Accession Number : ADD005134

Title :   Range Switching Circuit for Solid State Electrometer.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Nirschl,Joseph C

Report Date : 20 Sep 1977

Pagination or Media Count : 6

Abstract : This patent describes a range switching circuit for a solid state electrometer, e.g., for use in a radiacmeter, includes a substantially symmetrical circuit having an n-channel MOSFET and an NPN transistor in one branch and a p-channel MOSFET and a PNP transistor in the other branch. The electrometer includes an operational amplifier with two high value resistors in the feedback path. A latching reed relay selectively shorts out one of the feedback resistors when one of the transistors is gated on by the corresponding MOSFET. (Author)

Descriptors :   *Patents, *Switching circuits, *Electrometers, Field effect transistors, Metal oxide semiconductors, Radiometers, Feedback, Gates(Circuits), Circuit analysis

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE