CircuitLab Online Simulator

If you don't mind having your circuits in the public domain, then CircuitLab is a very nice FREE, online SPICE type circuit simulator with a professional quality user interface and output graph function. CircuitLab handles analog, digital, and mixed-mode simulations with DC, AC, swept time domain and frequency responses. After signing up for an account, you have access to a large number of user-generated circuits that are available for use as-is or for modifying to meet your particular needs. You can use CircuitLab without creating an account, but then you will not be able to save or recall your circuits. A large library of pre-defined components are available, and standard SPICE expressions can also be entered.

Posted May 2013

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...

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