Periodic Sampling Logarithmic Amplifier
- 1 January 1957
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 28 (1) , 37-40
- https://doi.org/10.1063/1.1715703
Abstract
The logarithmic response of the amplifier described in this paper is derived by extracting an output proportional to the time required for the voltage across a parallel resistance condenser combination to decay to a small fixed value. The input voltage is sampled with a 400‐cy converter. Accordingly, the amplifier is restricted to a resolving time of 1/400th of a second. A logarithmic response over four decades with a deviation of less than 1% of the maximum output is secured. The immediate purpose of the amplifier is to aid in the study of the transients associated with photocells.This publication has 3 references indexed in Scilit:
- The High-Accuracy Logarithmic ReceiverProceedings of the IRE, 1954
- A Sampling Analogue ComputerProceedings of the IRE, 1952
- Acorn Diode Has Logarithmic Range of 109Review of Scientific Instruments, 1951