Accession Number : ADD009390

Title :   Fast Operating Switchable Operational Amplifier Driven Circuits.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Watkins,Grant H

Report Date : 06 Apr 1982

Pagination or Media Count : 8

Abstract : Faster switching speeds for switchable noise filters and faster sampling speeds for sample and hold circuits are realized by means of an operational amplifier driven circuit in which excess feedback loop gain of the operational amplifier is used to reduce the effective value of resistance in the device's capacitor charging circuit. Two operational feedback loops are used, one or the other of which is switched into the circuit to effect either an open loop or a closed loop condition. The time required to charge the device's capacitor is a function of the ratio of the operational amplifier's closed loop gain divided by its open loop gain. (Author)

Descriptors :   *Patents, *Operational amplifiers, Switching circuits, Feedback, Loops, Dual mode, Gain, Noise(Radar), Electric filters, High rate

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE