Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Signal integrity simulation method for mixed encryption model

A technology of signal integrity and simulation methods, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to complete link simulation and distortion of simulation results, and achieve outstanding substantive features, reliable principles, and The effect of broad application prospects

Active Publication Date: 2018-11-02
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the used chip model is encrypted and inconsistent with other model types in the early signal integrity simulation of the high-speed circuit design with a relay chip, resulting in distortion of the simulation results or failure to complete the link simulation. Signal Integrity Simulation Method of Encrypted Hybrid Model

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Signal integrity simulation method for mixed encryption model
  • Signal integrity simulation method for mixed encryption model
  • Signal integrity simulation method for mixed encryption model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for simulating signal integrity of an encrypted mixed model provided in this embodiment includes:

[0037] Using transient simulation to extract the step response of the SPICE model;

[0038] Generate an external random code signal;

[0039] Import the extracted step response data as the input source of ADS channel simulation;

[0040] The ADS channel emulator calculates the eye diagram of the RX end according to the algorithm and the external random code signal, and completes the eye diagram measurement.

[0041] In this embodiment, the verification link needs to be carried out before the transient simulation, and the verification link is that the TX end is connected to the RX end through a wiring model; the TX end chip is an encrypted SPICE model, and the step response generated by the TX end chip is completely Contains the characteristics of the TX-side chip; the RX-side chip is an IBIS AMI model; the TX-side SPICE model is an RC circuit.

[0042] In this...

Embodiment 2

[0050] This embodiment provides a signal integrity simulation method of an encrypted mixed model. In this embodiment, the SPICE model at the TX end is an encrypted model, and the steps of the simulation method include:

[0051] 1) Transient simulation based on HSPICE, the encrypted SPICE model and link construction are used for transient step response simulation, and the step response output file with the suffix .lis is obtained; edit the format of the file so that it can be called by ADS The suffix is ​​.tim file;

[0052] 2) Carry out active simulation, import the step response data (.tim) into ADS for active simulation, call the step response data in ADS, and complete the active simulation with an external random code signal source; reserve the input interface of the model , it is convenient to input a step signal outside the model; import it into the channel simulation as the signal source of the RX terminal, add a random code signal, and set related parameters;

[0053] ...

Embodiment 3

[0055] The simulation link in this embodiment is as follows figure 1As shown, the TX end chip is an encrypted SPICE model, the relay system chip and the RX end chip are IBIS AMI models, and the Pre_channel and Post_channel in the link are both 5inch long PCB trace models; the TX end is Broadcom's PEX9797 chip , the Re-driver is TI's DS80PCI800 chip, and the RX end is the CPU model provided by Intel.

[0056] Since the SPICE model and the IBIS AMI model cannot exist in the simulation link at the same time, first figure 2 The verification link shown is for simulation verification, in which the TX and RX end chips are SPICE models and IBIS AMI models respectively, and the TX end SPICE model is an RC circuit, and the link only includes 5-inch length PCB traces.

[0057] In this embodiment, the SPICE model at the TX end is assumed to be an unencrypted model, and the simulation steps are as follows:

[0058] 1) SPICE model import. Import the SPICE model based on the Spice Wizard...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of high-speed signal quality evaluation, and particularly relates to a signal integrity simulation method for a mixed encryption model. The method comprises the steps of extracting a step response of an SPICE model through transient simulation; generating an external random code signal; importing extracted step response data to serve as an input sourcefor ADS channel simulation; and calculating out an eye diagram of an RX end according to an algorithm and the external random code signal by an ADS channel simulator, thereby finishing eye diagram measurement. The signal integrity simulation method for the mixed encryption model with an IBIS AMI model and the like can effectively solve the problem that the signal integrity simulation cannot be accurately performed or the simulation cannot be performed because a manufacturer provides encryption models or model types are inconsistent.

Description

technical field [0001] The invention belongs to the technical field of high-speed signal quality evaluation, and in particular relates to a signal integrity simulation method of an encrypted mixed model. Background technique [0002] With the continuous development of computer technology, among many factors that determine the performance of digital systems, the phenomenon of high-speed interconnection is playing a leading role. In the past, high-speed system design often used the "wiring-simulation-rewiring" method. This method required engineers to do wiring first, and then perform simulation operations; -simulation-rewiring" process. [0003] This design method takes a lot of time to meet the design requirements, so engineers must use appropriate methods and analysis and simulation tools to evaluate the design feasibility and risk points in advance, and optimize the design based on the simulation results to improve the success rate of system design and shorten the develop...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F17/50
CPCG06F30/392G06F30/367G06F30/398G06F30/3308
Inventor 荣世立王林
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com