Cirrus Logic (CRUS) is a fabless semiconductor supplier specializing in analog, mixed-signal, and audio DSP integrated circuits (ICs). They are presently headquartered in Austin, Texas. Their audio processors and audio converters are found in many professional audio and consumer entertainment products, including portable media players, home-theater receivers, TVs and set-top box hardware. Cirrus Logic's analog mixed-signal converter chips are also used in a wide variety of industrial energy-related applications. At one time, Cirrus Logic also designed and sold modem controllers, Hard Disk controller chips, CD-drive controller chips, PC sound-card controllers, and PC graphics chips (Cirrus Logic has ended these business operations.) It was started as Patil Systems, Inc., in Salt Lake City in 1981, by Dr. Suhas Patil and renamed as Cirrus Logic when it moved to Silicon Valley in 1984.
Cirrus Logic has more than 1,000 patents and more than 600 products serving more than 2,500 end customers globally.