For amplifying low current double monitoring circuit, the amplification function separating device of function subassemblyTechnical field
The present invention relates to circuit monitorings, more particularly to a kind of for amplifying the low current double monitoring electricity of function subassemblyRoad, amplification function separating device.
Background technique
Amplification function subassembly function is that the four tunnels reception signal sent to antenna feeder amplifies function point with level assembly after satisfactionUse demand.Since four tunnels that antenna feeder is sent receive, dynamic range of signals is big, signal power is small, can not be using nowadays conventional functionRate observation circuit realizes the malfunction monitoring of component, and component requires faulty monitoring this functionality, therefore needs to provide one kindLow current double monitoring circuit can carry out undercurrent and overcurrent double monitoring, Huo Zheti to the low current of amplification function subassemblyComponent faults are monitored to realize for a kind of amplification function subassembly with low current double monitoring circuit.
Summary of the invention
The purpose of the present invention is to provide a kind of for amplifying the low current double monitoring circuit of function subassembly, to solveThe above problem.
In order to achieve the above objectives, the present invention adopts the following technical solutions:
First aspect present invention discloses a kind of for amplifying the low current double monitoring circuit of function subassembly, the small electricityFlowing double monitoring circuit includes:
Current detecting amplifying circuit, for detecting the current signal of power input amplification function subassembly and believing the electric currentOutput is to electric voltage observation circuit after number amplification；
The electric voltage observation circuit for amplified current signal to be converted to voltage signal, and is believed the voltageIt is handled after number being divided, to realize to the double of the overcurrent of the undercurrent and low current of the low current of amplification function subassemblyIt monitors again and exports monitoring voltage.
Preferably, the current detecting amplifying circuit includes:
Inductor is filtered for the current signal to power input；
First resistor device, for the filtered current signal of the inductor to be output to amplification function subassembly；And
The current sense amplifier, for detecting the current signal in first resistor device, and will be in first resistor deviceIt exports after current signal amplification to the electric voltage observation circuit.
Preferably, the input terminal of the inductor connects to power supply, the output end of the inductor and the first resistorThe input terminal of device connects；The input terminal of the first resistor device is connect with the end RS+ of the current sense amplifier, and described firstThe output end of resistor is connect with the end RS- of the current sense amplifier, the output end and amplification function of the first resistor deviceThe input terminal of subassembly connects；The output end of the current sense amplifier is connect with the input terminal of the electric voltage observation circuit.
Preferably, the electric voltage observation circuit includes:
Second resistor, the current signal for exporting current sense amplifier in the current detecting amplifying circuit turnIt is changed to first voltage signal；
3rd resistor device, the current signal for exporting current sense amplifier in the current detecting amplifying circuit turnIt is changed to second voltage signal, and is exported after being divided with the second resistor to voltage signal to common voltage monitor；
The common voltage monitor, using the two-way voltage monitor with OC, for respectively to first electricityPressure signal and the second voltage signal are handled and are exported monitoring voltage, wherein in OC two-way voltage monitorsPortion is containing there are two voltage detecting circuit, the reference voltage differences of two voltage detecting circuits, for monitoring the different electricity of two-wayPressure；
5th regulator block is secondary steady for carrying out the current signal after inductor filter in the current detecting amplifying circuitVoltage value needed for being pressed onto the common voltage monitor is powered for the common voltage monitor；And
4th resistor, for adjusting the monitoring voltage value of the common voltage monitor output.
Preferably, the electric voltage observation circuit further include: the 5th resistor, to control the low current double monitoring electricityThe undercurrent of the double monitoring or low current of the overcurrent of the undercurrent and low current of road progress low current is separately monitored.
Preferably, the output end of the current sense amplifier respectively with the input terminal of the second resistor and described logicalIt is connected with the end Input1 of voltage monitor；The input with the 3rd resistor device respectively of the output end of the second resistorEnd is connected with the end Input2 of the common voltage monitor；The power end of the common voltage monitor is respectively with describedThe output end of five regulator blocks is connected with the input terminal of the 4th resistor；The output end of 4th resistor respectively with it is describedThe end output1 of common voltage monitor is connected with the input terminal of the 5th resistor；The output of 5th resistorEnd is connect with the end output2 of the common voltage monitor；Wherein, the output end of the 4th resistor is the low currentThe monitoring voltage output end of double monitoring circuit.
Preferably, when the overcurrent for the undercurrent and low current for controlling the low current double monitoring circuit progress low currentDouble monitoring when, the 5th resistor be set as short circuit；Low current is carried out when controlling the low current double monitoring circuitWhen being separately monitored of undercurrent, the 5th resistor be set as open circuit.
Preferably, the current signal for the power input amplification function subassembly that the current detecting amplifying circuit will test is putIt is 50 times big.
Second aspect of the present invention discloses a kind of amplification function separating device, and the amplification function separating device includes: amplification function groupingPart and the low current double monitoring electricity for being used to amplify function subassembly as described above for being serially connected in the amplification function subassembly input terminalRoad.
Preferably, the amplification centimetre component includes the first regulator block, the second regulator block, third regulator block, the 4th pressure stabilizingBlock, the first amplification power-devided circuit, the second amplification power-devided circuit, third amplification power-devided circuit and the 4th amplification power-devided circuit, wherein
First regulator block amplifies function with first resistor device in the current detecting amplifying circuit and described first respectivelyParallel circuit connection；Second regulator block amplifies with first resistor device in the current detecting amplifying circuit and described second respectivelyPower-devided circuit connection；The third regulator block is put with first resistor device in the current detecting amplifying circuit and the third respectivelyBig power-devided circuit connection；4th regulator block respectively with first resistor device and the described 4th in the current detecting amplifying circuitAmplify power-devided circuit connection.
Beneficial effects of the present invention are as follows:
Technical solution of the present invention has the advantages that definite principle, design are simple, and the technical solution first uses electric currentDetection amplifier amplifies low current, then converts electrical current into voltage, and by reasonable distribution monitoring voltage and use hasOC common voltage monitors are realized to the quick undercurrent of amplification function subassembly low current and overcurrent double monitoring.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 shows the schematic illustration of the low current double monitoring circuit in one embodiment of the present of invention.
Fig. 2 shows the schematic illustrations of the amplification function subassembly in one embodiment of the present of invention
In figure: 1001, current detecting amplifying circuit；1002, amplify function subassembly；1003, electric voltage observation circuit；1, inductanceDevice；2, first resistor device；3, current sense amplifier；4, the first regulator block；5, the first amplification power-devided circuit；6, the second pressure stabilizingBlock；7, the second amplification power-devided circuit；8, third regulator block；9, third amplifies power-devided circuit；10, the 4th regulator block；11, it the 4th putsBig power-devided circuit；12, second resistor；13,3rd resistor device；14, common voltage monitor；15, the 5th regulator block；16,Four resistors；17, the 5th resistor.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawingsIt is bright.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that institute is specific belowThe content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
As shown in Figure 1, it is double to disclose a kind of low current for amplifying function subassembly in one embodiment of the inventionWeight observation circuit, the low current double monitoring circuit includes: current detecting amplifying circuit 1001 and current monitoring circuit 1003.Current detecting amplifying circuit 1001 is used to detect the current signal of power input amplification function subassembly and puts the current signalIt exports after big to electric voltage observation circuit；The electric voltage observation circuit 1003 is used to being converted to amplified current signal into voltage letterNumber, and handled after being divided to the voltage signal, to realize to the undercurrent of the low current of amplification function subassembly andThe double monitoring of the overcurrent of low current simultaneously exports monitoring voltage.
In the present embodiment, the current detecting amplifying circuit includes: that inductor 1, first resistor device 2 and current detecting are putBig device 3.The current signal of power input is filtered by the inductor 1；Recycle the first resistor device 2 describedThe filtered current signal of inductor 1 is output to amplification function subassembly, realizes circuit concatenation connection, and and current sense amplifier3 connections are to detect the current signal for being output to amplification function subassembly；The current sense amplifier 3 passes through the first resistorDevice 2 detects the current signal for being output to amplification function subassembly, and exports after 50 times of the current signal amplification that will test to describedElectric voltage observation circuit 1003, wherein can be detected to different electric currents by the resistance value for changing the first resistor device 2.It is describedThe input terminal of inductor 1 connects to power supply, and the output end of the inductor 1 is connect with the input terminal of the first resistor device 2；InstituteThe input terminal for stating first resistor device 2 is also connect with the end RS+ of the current sense amplifier 3, the output of the first resistor device 2End is connect with the end RS- of the current sense amplifier 3, the output end of the first resistor device 2 also with amplify function subassemblyInput terminal connection；The output end (i.e. OUT pin in Fig. 1) and the electric voltage observation circuit of the current sense amplifier 31003 input terminal connection.
In the present embodiment, the electric voltage observation circuit includes: second resistor 12,3rd resistor device 13, common voltageMonitor 14, the 5th regulator block 15 and the 4th resistor 16.The second resistor 12 is by the current detecting amplifying circuitThe current signal that current sense amplifier 3 exports in 1001 is converted to first voltage signal；The 3rd resistor device 13 will be describedThe current signal that current sense amplifier 3 exports in current detecting amplifying circuit 1001 is converted to second voltage signal, and with instituteIt states and exports after second resistor divides voltage signal to common voltage monitor 14.Respectively determine first resistor device,When second resistor and 3rd resistor device, total threshold value is determined according to the high and low thresholds of total current demand in amplification function subassembly,The intrinsic standoff ratio that second resistor Yu 3rd resistor device are determined according to the lower limit of the upper limit of undercurrent and overcurrent, according to comparatorThe current range of trigging signal and normal work determines first resistor device resistance value, and then according to the clear second resistance of above-mentioned intrinsic standoff ratioDevice and 3rd resistor device Standard resistance range, when wherein total current refers to normal work monitoring in need output electric current it is (i.e. above-mentionedIn be known as low current), total threshold value refers to the boundary value that overcurrent or undercurrent are judged when monitoring, common voltage when reaching the boundary valueMonitor, which is converted to analog level, indicates normal or abnormal digital quantity, provides instruction for monitoring result or feeds back to downThe control circuit of grade, for the circuit in protection system or is alerted.
The common voltage monitor 14, using the two-way voltage monitor with OC, respectively to the first voltageSignal and the second voltage signal are handled, and judge to amplify whether the electric current of function subassembly is undercurrent by voltage signalOr overcurrent, and to junior's circuit output monitoring voltage, to realize the protection etc. to amplification function subassembly, wherein with OCContaining there are two voltage detecting circuit inside two-way voltage monitor, only reference voltage is different for two voltage detecting circuits, to be used forMonitor the different voltage of two-way.Since respective reference voltage is different, it can be used for monitoring the different voltage of two-way, therefore can be used for instituteState the undercurrent and overcurrent double monitoring of amplification function subassembly.5th regulator block 15 is by the current detecting amplifying circuitIn 1001 the filtered current signal of inductance 1 carry out secondary pressure to the common voltage monitor 10 needed for voltage value, beThe common voltage monitor 14 is powered.The 4th resistor 16 in the electric voltage observation circuit 1003 can adjust described generalThe monitoring voltage value that voltage monitor 14 exports, to realize the matching to junior's circuit.
In the present embodiment, the electric voltage observation circuit 1003 further include: the 5th resistor 17.5th resistor 17Switching can be adjusted to the circuit in electric voltage observation circuit, carry out low current to control the low current double monitoring circuitUndercurrent and the double monitoring of overcurrent or the undercurrent of low current of low current be separately monitored.The current detecting amplificationThe output end of device 3 is connected with the end Input1 of the input terminal of the second resistor 12 and the common voltage monitor 14 respectivelyIt connects；The output end of the second resistor 12 respectively with the input terminal of the 3rd resistor device 13 and the common voltage monitor14 end Input2 is connected；The power end (i.e. the end Vc in Fig. 1) of the common voltage monitor 14 is respectively with the described 5thThe output end of regulator block 15 is connected with the input terminal of the 4th resistor 16；The output end of 4th resistor 16 respectively withThe end output1 of the common voltage monitor 14 is connected with the input terminal of the 5th resistor 17；5th resistanceThe output end of device 17 is connect with the end output2 of the common voltage monitor 14；At this time using the 4th resistor 16Output end is the monitoring voltage output end of the low current double monitoring circuit.
Further, the control of the common voltage monitor 14 is switched about the 5th resistor 17: works as controlWhen the double monitoring of the overcurrent of the undercurrent and low current of the low current double monitoring circuit progress low current, the described 5thResistor 17 is set as short circuit；When being separately monitored for the undercurrent for controlling the low current double monitoring circuit progress low currentWhen, the 5th resistor 17 is set as open circuit.
Above-described embodiment small current double monitoring circuit uses a current sense amplifier, passes through an external flow measurementResistance (i.e. first resistor device) amplifies the electric current of function subassembly to detect；The current signal that current detecting amplifying circuit is exported againVoltage signal is converted to, by reasonable distribution voltage signal and using the two-way voltage monitor with OC, realizes amplificationThe double monitoring of the overcurrent of the undercurrent and low current of function subassembly low current provides support to the status monitoring of system.
A kind of amplification function separating device is disclosed in another embodiment of the present invention, comprising: amplification function subassembly 1002With the above-mentioned low current double monitoring circuit for being used to amplify function subassembly for being serially connected in amplification 1002 input terminal of function subassembly.As shown in Fig. 2, four tunnel radiofrequency signals of input can be amplified function point to meet late-class circuit by the amplification function subassemblyUse demand, while can also realize itself monitoring and protecting based on low current double monitoring circuit.
In the present embodiment, the amplification function subassembly 1002 includes the first regulator block 4, the second regulator block 6, third pressure stabilizingBlock 8, the 4th regulator block 10, first amplification power-devided circuit 5, second amplifies power-devided circuit 7, third amplifies power-devided circuit 9 and the 4thAmplify power-devided circuit 11, wherein first regulator block 4 respectively with first resistor device 2 and institute in the current detecting amplifying circuitState the connection of the first amplification power-devided circuit 5；Second regulator block 6 respectively with first resistor device in the current detecting amplifying circuit2 and described second amplify the connection of power-devided circuit 7；The third regulator block 8 is respectively in the current detecting amplifying circuit firstResistor 2 and third amplification power-devided circuit 9 connect；4th regulator block 10 respectively with the current detecting amplifying circuitMiddle first resistor device 2 and the 4th amplification power-devided circuit 11 connect.
Specifically, the output end of the first resistor device 2 also respectively with the input terminal of first regulator block 4, describedThe input terminal of two regulator blocks 6, the third regulator block 8 input terminal be connected with the input terminal of the 4th regulator block 10；InstituteThe output end of the first regulator block 4 is stated to connect with the input terminal of the first amplification power-devided circuit 5, second regulator block 6 it is defeatedOutlet is connect with the input terminal of the second amplification power-devided circuit 7, and the output end of the third regulator block 8 and the third are amplifiedThe input terminal of power-devided circuit 9 connects, the input of the output end of the 4th regulator block 10 and the 4th amplification power-devided circuit 11End connection.First regulator block 4 carries out the first via power supply signal that first resistor device 2 exports in the current detecting amplifying circuitSecondary pressure is to required voltage value, for the amplifier power supply in the first amplification power-devided circuit；First amplification power-devided circuit will be defeatedThe first via radiofrequency signal entered amplifies function point to meet the use demand of late-class circuit；Second regulator block examines the electric currentThe the second road power supply signal for surveying first resistor device output in amplifying circuit carries out secondary pressure to required voltage value, puts for secondAmplifier power supply in big power-devided circuit；Second amplification power-devided circuit by the second tunnel radiofrequency signal of input amplify function point withMeet the use demand of late-class circuit；The third that third regulator block exports first resistor device in the current detecting amplifying circuitRoad power supply signal carries out secondary pressure to required voltage value, amplifies the amplifier power supply in power-devided circuit for third；Third is putThe third road radiofrequency signal of input is amplified function point to meet the use demand of late-class circuit by big power-devided circuit；4th pressure stabilizingThe four-way power supply signal that block exports first resistor device in the current detecting amplifying circuit carries out secondary pressure to requiredVoltage value, for the amplifier power supply in the 4th amplification power-devided circuit；4th amplification power-devided circuit believes the 4th road radio frequency of inputFunction point number is amplified to meet the use demand of late-class circuit.
In order to reach the dual prison of the undercurrent of the low current preferably to amplification function subassembly and the overcurrent of low currentEffect is surveyed, embodiment, which is disclosed, in the present invention first amplifies low current using current sense amplifier, then electric current is convertedFor voltage, double monitoring is carried out using common voltage monitor.In low current double monitoring circuit work, external inputPower supply signal be introduced into the inductor 1, the power supply signal of 1 pair of inductor input is filtered.Through the electricityThe filtered power supply signal of sensor 1 enters the first resistor device 2 and the current sense amplifier 3, the first resistor device 2It is connected between power supply and rear end amplification power-devided circuit 1002, the electricity of amplification function subassembly is detected based on the first resistor device 2Stream, the resistance value for changing the first resistor device 2 can detect different electric currents.Since the electric current of amplification function subassembly is less than500mA, therefore defining low current in the present invention is the electric current less than 500mA, current sense amplifier 3 passes through first resistor deviceThe electric current of function subassemblies is amplified in 2 detections, and defeated through OUT pin after 50 times of Current amplifier for amplifying function subassembly detectedOut.It is steady that power supply signal by first resistor device 2 (current sensing resistance) enters the first regulator block 4, the second regulator block 6, third simultaneouslyBriquetting 8 and the 4th regulator block 10, again to corresponding after voltage value needed for each regulator block pressure stabilizing to corresponding amplification power-devided circuitAmplify the amplifier power supply in power-devided circuit.
Electric current through the amplified amplification function subassembly of current sense amplifier 3 sequentially enters second resistor 12, thirdThe current signal that current sense amplifier 3 exports is converted to voltage by resistor 13, second resistor 12 and 3rd resistor device 13Signal, and voltage signal is suitably divided, it exports to common voltage monitor 14.Common voltage monitor 14 is to secondThe voltage signal that resistor 12 and 3rd resistor device 13 are converted is monitored, and utilizes its two internal identical voltage detecting electricityRoad (only voltage reference is different, and voltage reference is decided according to the actual requirements), the different voltage of monitoring two-way, to realize to amplification functionThe undercurrent and overcurrent double monitoring of subassembly small current.The 5th regulator block 5 is by the filtered electricity of the inductor 1 simultaneouslyVoltage value needed for source signal carries out secondary pressure to common voltage monitor 14 is powered for common voltage monitor 14.Through logicalThe 4th resistor 16, the adjustable common voltage prison of the 4th resistor 16 are output to the monitoring voltage that voltage monitor 14 exportsThe monitoring voltage value for surveying device A14 output, for preferably being connected with late-class circuit.5th resistor 17 is to select low current doubleOnly realize that undercurrent is separately monitored or the double monitoring of undercurrent and overcurrent in weight observation circuit.Using low current double monitoringThe circuit monitoring voltage output end final as the electric voltage observation circuit using the voltage of the output end of the 4th resistor 16.
Small current double monitoring circuit of the present invention can be realized to the quick undercurrent of amplification function subassembly low current and mistakeElectric current double monitoring, overcoming amplification function subassembly can not realize that component faults are supervised using nowadays conventional power monitoring circuitThe shortcomings that survey.The amplification function separating device disclosed in embodiment realizes the monitoring to itself amplification function subassembly simultaneously, equallyAlso overcome the monitoring that cannot achieve in ordinary power observation circuit to amplification function subassembly low current.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pairThe restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the artTo make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hairThe obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.