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CustomSim Native Circuit Checks
Find Electrical Rule Violations and Power Management Failures Before Tape-out
Consider the number of checks that an IC design team has to go through before tape-out. In each
company, chip failures ultimately translate into additional checks in the sign-off flow. Technology and
design trends are responsible for further increasing the number of checks. In the design flow, mature
solutions exist for verifying compliance with physical design rules (DRC). However, when it comes to
verifying electrical rules, the solutions have been piecemeal and, in many cases, homegrown. This
is because individual electrical rules need to be checked at different phases of the design either in
schematic or layout, requiring knowledge of circuit functionality, operating regions, and physical design.
Until now, no single solution has been available that can address all of these individual checks across
the complete design flow and provide the capability for designers to add additional checks through a
programmable interface. Often, it has only been possible to check for certain failure mechanisms by
eyeballing the design or manually inspecting layout—a process that is time-consuming and error-prone.
The CustomSimTM circuit simulation solution introduces native circuit checks into the AMS domain,
providing a single solution for electrical rule checking. In this white paper we will discuss some
examples of the failure mechanisms that are detected by the native circuit checks, how native circuit
checks enable verification of power management techniques, as well as discuss how customized checks
can be implemented.
Electrical Rule Circuit Checking
The CustomSim native circuit checks provide a comprehensive set of static and dynamic checks.
These checks are invoked at different stages of the design cycle including pre-simulation design analysis,