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A simulation method and system for a periodic signal in a chip circuit

A technology of periodic signal and simulation method, which is applied in the fields of electrical digital data processing, instrumentation, calculation, etc., and can solve problems such as unsatisfactory periodic signal effect, time step size, and simulation speed cannot be improved.

Active Publication Date: 2019-07-26
INSPUR BEIJING ELECTRONICS INFORMATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of the predicted value of the periodic signal is not ideal, and the decrease in the efficiency of the predicted value further affects the time step, resulting in the failure to improve the simulation speed.

Method used

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  • A simulation method and system for a periodic signal in a chip circuit
  • A simulation method and system for a periodic signal in a chip circuit
  • A simulation method and system for a periodic signal in a chip circuit

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Experimental program
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Effect test

Embodiment 1

[0034] The invention provides a simulation method of a periodic signal, figure 1 A flow chart of Embodiment 1 of the daimyo periodic signal simulation method is shown, including:

[0035] Step S101: Obtain node information at each moment of a cycle and store it as historical cycle information;

[0036] Obtain a cycle of NODE nodes, and store the node information at each moment in the form of a historical information matrix, such as figure 2 As shown, it is a historical information matrix, where NodeXz represents the NODE whose periodic signal of the circuit is coded as z, Nx* represents the *th historical value of a certain NODE, Kx represents the xth slope of the NODE, and △t represents the time step , the linked list length of each NODE can be different. The historical information matrix is ​​composed of multiple linked lists, which can be dynamically adjusted to meet the simulation requirements of different circuit scales.

[0037] Step S102: Obtain the node value at th...

Embodiment 2

[0045] The invention also provides a simulation system of a periodic signal, Figure 5 The schematic diagram showing the second embodiment of the simulation system of the periodic signal of the present invention includes:

[0046] The historical cycle information acquisition module 101 is used to obtain node information at each moment of a cycle, and store it as historical cycle information;

[0047] The starting moment node acquisition module 102 is used to obtain the node value at the current moment obtained by simulation and the node value at two moments before the current moment, and combine the node at the current moment with the node at the two moments before the current moment The node is used as the three starting time nodes;

[0048] A matching module 103, configured to match three consecutive historical time nodes corresponding to the three starting time node information in the stored historical cycle information;

[0049] The calculation module 104 is used to calc...

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Abstract

The invention discloses a periodic signal simulation method and system. Node information of all moments in a period is obtained and stored as historical period information; the node value of a current moment and node values of two moments before the current moment obtained through simulation are obtained; a node of the current moment and nodes of the two moments before the current moment serve as three start moment nodes; three continuous historical moment nodes corresponding to information of the three start moment nodes are matched in the stored historical period information; the node value of the next moment is calculated through the differential fitting algorithm according to the historical period information and the information of the three start moment nodes; an equation set is solved through the value till the right item converges and a real value of the moment is obtained; by means of a node value of a new moment, node values of subsequent periods are calculated through the interpolation fitting algorithm, and stimulation computation can be accurately carried out on period signal values of circuits.

Description

technical field [0001] The invention relates to the field of circuit simulation, in particular to a method and system for simulating periodic signals in chip circuits. Background technique [0002] Now, with the rapid expansion of the chip circuit scale, the demand for productization has also increased, and there are higher requirements for the simulation accuracy and speed of the circuit. In order to meet the needs of circuit simulation speed, various emulator manufacturers use linear interpolation and quadratic interpolation to improve the accuracy of predicted values ​​in order to improve the circuit simulation speed. However, the effect of the predicted value of the periodic signal is not ideal, and the decrease in the efficiency of the predicted value further affects the time step, resulting in that the simulation speed cannot be improved. It is urgent to propose a simulation method for periodic signals. Contents of the invention [0003] In view of this, the main p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 刘同强刘刚童圆满李仁刚
Owner INSPUR BEIJING ELECTRONICS INFORMATION IND