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Title: ULTRA-STABILIZED D. C. AMPLIFIER

Abstract

An improved circuit is described for stabilizing the drift and minimizing the noise and hum level of d-c amplifiers so that the output voltage will be zero when the input is zero. In its detailed aspects, the disclosed circuit incorporates a d-c amplifier having a signal input, a second input, and an output circuit coupled back to the first input of the amplifier through inverse feedback means. An electronically driven chopper having a pair of fixed contacts and a moveable contact alternately connects the two inputs of a difference amplifier to the signal input. The A. E. error signal produced in the difference amplifier is amplified, rectified, and applied to the second input of the amplifier as the d-c stabilizing voltage.

Inventors:
; ;
Issue Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4246065
Patent Number(s):
2874235
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-13-015330
NSA Number:
NSA-13-015330
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-59
Country of Publication:
United States
Language:
English
Subject:
INSTRUMENTS; AMPLIFIERS; BACKGROUND; CHOPPERS; ELECTRIC POTENTIAL; ELECTRONIC EQUIPMENT; PLANNING; PULSE GENERATORS; RECTIFIERS; STABILITY

Citation Formats

Hartwig, E.C., Kuenning, R.W., and Acker, R.C. ULTRA-STABILIZED D. C. AMPLIFIER. United States: N. p., 1959. Web.
Hartwig, E.C., Kuenning, R.W., & Acker, R.C. ULTRA-STABILIZED D. C. AMPLIFIER. United States.
Hartwig, E.C., Kuenning, R.W., and Acker, R.C. Tue . "ULTRA-STABILIZED D. C. AMPLIFIER". United States.
@article{osti_4246065,
title = {ULTRA-STABILIZED D. C. AMPLIFIER},
author = {Hartwig, E.C. and Kuenning, R.W. and Acker, R.C.},
abstractNote = {An improved circuit is described for stabilizing the drift and minimizing the noise and hum level of d-c amplifiers so that the output voltage will be zero when the input is zero. In its detailed aspects, the disclosed circuit incorporates a d-c amplifier having a signal input, a second input, and an output circuit coupled back to the first input of the amplifier through inverse feedback means. An electronically driven chopper having a pair of fixed contacts and a moveable contact alternately connects the two inputs of a difference amplifier to the signal input. The A. E. error signal produced in the difference amplifier is amplified, rectified, and applied to the second input of the amplifier as the d-c stabilizing voltage.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {2}
}