The 9812D low-frequency 1/f noise measurement system is designed to measure low-frequency noise characteristics of on-wafer or packaged semiconductor devices, including MOSFETs, bipolar junction transistors (BJTs), junction field effect transistors
(JFETs), diodes and diffusion resistors.
InterFET Corporation, a privately-held company founded in 1982, is a leading manufacturer and global supplier of discrete Junction Field Effect Transistors
(JFETs), custom integrated circuits, hybrid integrated circuits (MCM-C) and related semiconductor devices.
US Patent 8,169,022 was issued on May 1, 2012, and is entitled "Vertical Junction Field Effect Transistors
and Diodes Having Graded Doped Regions and Methods of Making.