An Improved Synchronous Detector
- 1 August 1949
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 20 (8) , 566-568
- https://doi.org/10.1063/1.1741617
Abstract
The synchronous amplifier design of Michels and Curtis has been modified to minimize feedback and so to allow preamplification and high sensitivity. The resulting instrument has a voltage sensitivity of 2×105 mm/volt with an inductive input impedance of 2×106 ohms. The frequency selectivity is sufficiently sharp so that the band width is of the order of 0.25 c.p.s. at 800 c.p.s. Advantages and disadvantages of the synchronous detector are discussed.Keywords
This publication has 2 references indexed in Scilit:
- A Pentode Lock-In Amplifier of High Frequency SelectivityReview of Scientific Instruments, 1941
- A balance-detector for alternating-current bridgesProceedings of the Physical Society, 1934