Circuit arrangement for measuring the phase modulation disturban

Details Circuit arrangement for measuring the phase modulation disturban Circuit arrangement for measuring the phase modulation disturban

1976-03-10

1977-09-20

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2700

Patent

active

040500144

ABSTRACT:
A circuit arrangement for measuring the phase modulation disturbance of a test signal which is passed through a test object and wherein a heterodyne oscillator supplies an input to a mixer which receives the input signal and supplies an output to a detector and display device and wherein the output of the mixer is applied to an automatic frequency control loop including a reference oscillator phase discriminator and a low pass filter which supplies an input to the frequency control input of the heterodyne oscillator.

REFERENCES:
patent: 3414809 (1968-12-01), Hoffmann et al.
patent: 3818331 (1974-06-01), Schlosser
patent: 3818332 (1974-06-01), Schlosser

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