A fast desktop calculator for analog and RF circuit designers. Calculate bias settings,
device sizes, and operating points — per transistor, in real time, with no "Run" button.
ProMOST is ChipDesignWorks' transistor sizing tool for CMOS technologies. It is meant to be used as a fast desktop calculator that lets designers quickly estimate optimum bias settings and device sizes, per device — resulting in extremely fast circuit dimensioning, easy porting, and easy bottleneck analysis.
Calculate operating point information for specific bias settings, device sizes and temperature
Calculate dimensions or bias conditions given a set of target performance metrics
Perform constrained or unconstrained sweeps for optimum performance
Calculate AC/RF properties: OIP, IIP, harmonic content, s-parameters and more
No "Run" button. Every change to a bias setting, device size, or operating condition recalculates instantly — typical response times well below 1 second, even for compound models.
Design speed improvement
Fourfold speed advantages
ProMOST accelerates the design process at every stage. Here is how:
01
Divide & conquer
Optimizing dimensions and bias conditions N transistors one-by-one is fundamentally faster than solving an MN-dimensional non-linear optimization problem simultaneously.
02
Near-optimum starting point
Using ProMOST for initial dimensioning means your first circuit simulator run will already be close to the optimum.
03
Simulator-accurate results
ProMOST runs the actual model in background solvers (ac, op, dc, noise) — results match your circuit simulator with sub-second response times.
04
Bottleneck identification
Optimizing single transistors efficiently pinpoints performance bottlenecks in your circuit design.
Deployment
Platform & integration
ProMOST supports many transistor models, including MOS11, PSP, and BSIM families plus compound models (transistors with diodes, passives, juncaps). It is used within major electronics companies and design houses worldwide.
ProMOST runs on Linux and macOS, either stand-alone or integrated in select IC design suites. It ships with add-ins for distortion, RF, small-signal, and switched-as configurations.
The ProMOST main GUI — select process, transistor type, corner and temperature. OP data, noise, mismatch and sweep panes update in real time.
Updates
News & releases
ProMOST is updated on average once a year with bug fixes, new features, added transistor models, and performance enhancements. A full update log is included with every software distribution package.
Latest release: ProMOST 4.11 (2026). Now available for Linux and macOS (Apple Silicon & Intel).
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