CN105447242A - Method for analyzing state of power supply network of integrated circuit in real time - Google Patents

Abstract

The present invention discloses a method for analyzing a state of a power supply network of an integrated circuit in real time. The method comprises: 1, according to power supply routing of an integrated circuit layout, extracting a resistance-capacitance network and forming a power supply network model in a spice format; 2, setting up a power supply unit by utilizing a power supply module in the integrated circuit, and forming a power supply model in a spice format; 3, based on integral circuit simulation, extracting a dynamic power consumption state of each module in the integrated circuit to form a power consumption model; 4, based on the power supply network model and the power supply model, setting up a top layer simulated circuit, wherein the power supply model is connected to a power supply node, and the power consumption model is connected to a power consumption node; and 5, carrying out simulation on the top layer simulated circuit by utilizing a spice tool, and carrying out waveform observation on different nodes to know the state of the power supply network in real time. According to the method disclosed by the present invention, a pressure drop of each node of the power supply network can be accurately analyzed, so that advantages and disadvantages of power supply signal routing can be analyzed, or the pressure drop of each node is used as judgment basis of regulating the number and positions of power supply units.

Description

A kind of method of real-time analysis ic power network state

[technical field]

The present invention relates to integrated circuit (IC) design technical field, particularly a kind of method of real-time analysis ic power network state.

[background technology]

At the beginning of integrated circuit back-end design (or layout design), need to carry out integrated planning layout to its electric power network; In prior art, generally rule of thumb the structure of electric power network is assessed in estimation or the simulation of rough top layer, and not accurately, and the quality of electric power network directly affects the quality of product, therefore has design risk.

[summary of the invention]

The object of the present invention is to provide a kind of method of real-time analysis ic power network state, can the pressure drop of each node of the electric power network of real-time analysis accurately, for design optimization reference.

To achieve these goals, the present invention adopts following technical scheme:

A method for real-time analysis ic power network state, comprising: carry out extraction to the power supply cabling of integrated circuit diagram and form electric power network model, is formed for electric model and power consumption model based on power module and integrated circuit electricity consumption condition; And based on electric power network model, for electric model and power consumption model buildings top layer artificial circuit; Top layer artificial circuit is emulated, obtains the real-time pressure drop situation of different node.

Further, specifically comprise the following steps:

The first step, according to the power supply cabling of integrated circuit diagram, extracts resistance-capacitance network, forms electric power network model; Define supply node and power consumption node simultaneously;

Second step, utilizes the power supply module in integrated circuit to build power supply unit, is formed for electric model;

3rd step, based on integrated circuit emulation, extracts the dynamic power consumption state of modules in integrated circuit, describes it as excitation file, become power consumption model;

4th step, based on electric power network model with for electric model, builds top layer artificial circuit; Wherein power source model is connected to supply node, and power consumption model is connected to power consumption node;

5th step, emulates top layer artificial circuit; By understanding the state of electric power network in real time to the waveform observation of different node.

Further, in the first step, electric power network model, confession electric model, excitation file are spice form; Spice instrument is utilized to emulate top layer artificial circuit in 5th step.

Relative to prior art, the present invention has following beneficial effect:

The power supply cabling of the present invention to integrated circuit diagram carries out extraction and forms electric power network model, is formed for electric model and power consumption model based on power module and integrated circuit electricity consumption condition; And based on electric power network model, confession electric model and power consumption model buildings top layer artificial circuit, wherein power source model is connected to supply node, and power consumption model is connected to power consumption node; Utilize spice instrument to emulate top layer artificial circuit, just can obtain the real-time pressure drop situation of different node, to understand the state of electric power network; The present invention can by actual physics domain cabling and for based on power consumption data, the emulation of emulation tool is relied on to analyze the pressure drop of the namely corresponding domain node of each node of electric power network accurately, and then the quality of power supply signal cabling can be analyzed, or the basis for estimation of adjustment as power supply unit (LDO etc.) quantity and position.

[accompanying drawing explanation]

Fig. 1 is integrated circuit diagram power supply cabling schematic diagram;

Fig. 2 is resistance-capacitance network model schematic;

Fig. 3 is for supplying electric model, the dynamic power consumption view of power consumption model and each module thereof;

Fig. 4 is top layer artificial circuit topological structure schematic diagram.

[embodiment]

Refer to shown in Fig. 1 to Fig. 4, the method for a kind of real-time analysis ic power of the present invention network state, comprises the following steps:

The first step, according to the power supply cabling of integrated circuit diagram, extracts resistance-capacitance network, forms the electric power network model of spice form.Define supply node and power consumption node simultaneously.

Second step, utilizes the power supply module in integrated circuit to build power supply unit, and what form spice form supplies electric model.

3rd step, based on integrated circuit emulation, extracts the dynamic power consumption state of modules in integrated circuit, describes it as the excitation file of spice form, become power consumption model.

4th step, based on the electric power network model in the aforementioned first, two step with for electric model, builds top layer artificial circuit.Wherein power source model is connected to supply node, and the power consumption model that the 3rd step produces is connected to power consumption node.

5th step, utilizes spice instrument to emulate top layer artificial circuit.By can understand the state of electric power network in real time to the waveform observation of different node.

Claims (3)

1. the method for a real-time analysis ic power network state, it is characterized in that, comprise: extraction is carried out to the power supply cabling of integrated circuit diagram and forms electric power network model, formed for electric model and power consumption model based on power module and integrated circuit electricity consumption condition; And based on electric power network model, for electric model and power consumption model buildings top layer artificial circuit; Top layer artificial circuit is emulated, obtains the real-time pressure drop situation of different node.

2. the method for a kind of real-time analysis ic power network state according to claim 1, is characterized in that, specifically comprise the following steps:

The first step, according to the power supply cabling of integrated circuit diagram, extracts resistance-capacitance network, forms electric power network model; Define supply node and power consumption node simultaneously;

Second step, utilizes the power supply module in integrated circuit to build power supply unit, is formed for electric model;

3rd step, based on integrated circuit emulation, extracts the dynamic power consumption state of modules in integrated circuit, describes it as excitation file, become power consumption model;

4th step, based on electric power network model with for electric model, builds top layer artificial circuit; Wherein power source model is connected to supply node, and power consumption model is connected to power consumption node;

5th step, emulates top layer artificial circuit; By understanding the state of electric power network in real time to the waveform observation of different node.

3. the method for a kind of real-time analysis ic power network state according to claim 2, is characterized in that, in the first step, electric power network model, confession electric model, excitation file are spice form; Spice instrument is utilized to emulate top layer artificial circuit in 5th step.