A Stable d.c. Amplifier Using 7567A Tubes
- 1 August 1934
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 5 (8) , 289-291
- https://doi.org/10.1063/1.1751853
Abstract
Two single‐tube d.c. amplifiers with 7567A tubes have been constructed which are extremely stable in operation. Following the design of DuBridge and Brown, a modified balanced bridge circuit is described wherein the drifts are not due to fluctuations in battery potentials or changes in filament emission. Data on the determination of circuit constants necessary for the elimination of drifts are given. Currents of 3×10−15 ampere give galvanometer deflections of one cm and readings can be obtained every 15 seconds.This publication has 3 references indexed in Scilit:
- An Improved d.c. Amplifying CircuitReview of Scientific Instruments, 1933
- An Improved Balanced Circuit for Use with Electrometer TubesReview of Scientific Instruments, 1933
- ONE-TUBE BALANCED CIRCUIT FOR D.C. VACUUM TUBE AMPLIFIERS OF VERY SMALL CURRENTSReview of Scientific Instruments, 1932