Laytools.com Home
 
 

Expand All LevelsCollpase All Levels

HomeLayTOOLS Products → Electrical Design

Electrical Design

The key software for an analog electrical circuit designer is a simulator. There are two types of simulator; one is referred to as a device-level simulator (or Spice simulator), and the other is generically referred to as a logic simulator (or digital simulator). Some simulators integrate both device-level and logic simulation as a so-called mixed-mode simulator. Logic simulators use standard languages (hardware description languages, the most common being Verilog or VHDL) which allow different levels of circuit abstraction, namely behavioral, structural (RTL), and gate-level. Advanced logic simulators wrap in analog  and system-oriented variants of the hardware description language (including Verilog-A, VHDL-AMS, SystemC, ABCD) so that a true mixed-mode simulation at a level higher than device-level may be run.

The necessity for mixed-mode simulation and for analog hardware description is to accommodate the need to develop circuits of ever-increasing complexity. As circuit complexity increase, so does the simulation time. Traditional gate-level only simulations could become unwieldy for example, except perhaps for some fully analog circuits.

To work with leading-edge technologies, however, it is vital that the simulation tool adopted must have certain characteristics.

For example, a device-level simulator:

must fully support the latest standard device model parameter formats
must converge satisfactorily
must offer straightforward approaches to analysis (provide a graphics viewer, and handle jitter and power consumption analysis)
must be closely integrated with the schematic capture tool  to allow back-annotation of simulated parameters onto the schematic display

A mixed-mode simulator:

must have the logic module be fully integrated with the device-level simulator module
should use a multi-domain single-kernel approach rather than  a co-simulation technique and a co-simulation back-plane

LayTOOLS offers a number of simulation interfaces for the user:

LaySIM-A
 Integrated Full-featured Analog simulator (SPICE transient analysis, Verilog-A) Powered by SMASH kernel
LaySIM-LMS Integrated Logic and, mixed signal simulator - LaySIM-A with Verilog-HDL and Verilog-AMS
 Powered by SMASH kernel
LaySIM-MSIM Interface to Analog and PCB simulator with IBIS support
 Powered by MSIM kernel
LaySIM-ADS Interface with Agilent-ADS RF simulator Requires Agilent ADS
LaySIM-SMX Interface for SiMetrix simulator
 Requires SiMetrix simulator
LaySIM-SYMInterface for SymSPICE simulator from Symica
 Requires SymSPICE simulator

 



 
footer Home footer Software Source footer Products footer LaySIM footer LayMPW footer Support footer PDK footer Downloads footer Services footer Contact Us footer Press footer Privacy Policy footer