Simucad is a provider of circuit simulation and CAD software tools used in the design of analog, mixed-signal, and RF integrated circuits. The company was incorporated in Delaware in June 2004 as a spin-off from Silvaco Data Systems.[1] Simucad acquired ownership all of Silvaco's simulation and CAD products and intellectual property, most notably the SmartSpice circuit simulator[2] Simucad's headquarters are in Santa Clara, California. There are three other direct sales offices in North Chelmsford, MA, Austin, TX, Phoenix, AZ. International sales and distribution is handled through Silvaco's existing network of offices in Japan, Korea, Taiwan, China, Singapore and the UK.