High voltage electronic amplifiers

摘要

PCT No. PCT/US95/00933 Sec. 371 Date Oct. 23, 1995 Sec. 102(e) Date Oct. 23, 1995 PCT Filed Jan. 24, 1995 PCT Pub. No. WO95/20266 PCT Pub. Date Jul. 27, 1995Novel high voltage electronic amplifiers that are capable of being monolithically integrated using low voltage semiconductor fabrication processes are described and claimed. A cascade of low voltage current mirrors is described that can act as a high voltage amplifier output circuit. A transconductor and level shift circuit is also described that can be employed in the high voltage amplifier output circuit. A high voltage current source is described and is constructed from the series combination of a low voltage transistor and a parasitic field oxide transistor. Additionally, a differential amplifier having bias-current shunting transistors is described that can be used to limit quiescent current from the output power supply of the high voltage amplifiers.