Electrical circuitry for measuring low level signals

Details Electrical circuitry for measuring low level signals Electrical circuitry for measuring low level signals

1978-02-24

1979-11-27

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2700

Patent

active

041763122

ABSTRACT:
Electrical circuitry for measuring low level signals comprising a source of ac signals to be measured, a synchronous detector clocked at the frequency of said ac, and a transformer coupling the source to the detector, improved in that, between the transformer and the detector, there are provided a wideband amplifier for amplifying both the information signal and noise present in the transformer output, followed by a filter having a passband of width intermediate those of the amplifier and the detector and centered on the clock frequency of the detector.

REFERENCES:
patent: 3501694 (1970-03-01), Ito

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