Low-Level dc Amplifier with Whole-Loop Feedback
- 1 December 1958
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 29 (12) , 1120-1124
- https://doi.org/10.1063/1.1716092
Abstract
The chopper amplifier described herein, using a 60-cps vibrating-contact modulator and whole-loop negative feedback, has a stabilized gain of 107 from dc to 10 cps. After the input circuits have reached thermal equilibrium, the zero drift is less than ±10−9 v per hour and less than 2×10−9 v per day.Keywords
This publication has 5 references indexed in Scilit:
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- D-C Amplifier Stabilized for Zero and GainTransactions of the American Institute of Electrical Engineers, 1948
- A Contact Modulated Amplifier to Replace Sensitive Suspension GalvanometersReview of Scientific Instruments, 1946
- Some Experiments on the Amplification of Thermocouple Electromotive ForcesReview of Scientific Instruments, 1938
- Principles of a New Portable ElectrometerPhysical Review B, 1932