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
- Patent Classifications (CPCs):
-
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03F - AMPLIFIERS
- 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}
}
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