William C. K. Petersen

Supertex, Inc. produces high voltage analog and mixed signal semiconductor components. It designs, develops, manufactures and markets integrated circuits, DMOS, HVCMOS and HVBiCMOS analog and mixed signal technologies. The company's integrated circuits are used in the medical ultrasound imaging, LCD TV LED backlighting, LED general lighting, telecommunications, printer, flat panel display, and industrial and consumer product industries. Their product includes high voltage analog multiplexer switches, pulsers, beam formers, transmit/receive switches, low noise amplifiers and high-speed MOSFET drivers. The company was founded by Henry C. Pao, Benidict C. K. Choy in 1976 and is headquartered in Sunnyvale, CA.

Siemens Corp. manufactures electrical hardware and software for the communication, power, medical and other industries. The company was founded in 1847 and is headquartered in Washington, DC.