Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1977-08-04
1978-12-12
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 2700
Patent
active
041298314
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 and a phase discriminator and wherein the output of the phase discriminator is supplied to a detector which supplies an input to a voltage comparator that also receives a reference voltage and which produces an output signal during the overshooting of the reference voltage by the output voltage of the phase discriminator and wherein a pulse counter which counts the occurrence of such overshoots is provided.
REFERENCES:
patent: 3384818 (1968-05-01), Longerich et al.
patent: 3414809 (1968-12-01), Hoffmann et al.
patent: 3737766 (1973-06-01), Lubarsky, Jr.
patent: 3818331 (1974-06-01), Schlosser
patent: 3818332 (1974-06-01), Schlosser
Fink Helmuth
Wess Guenter
Krawczewicz Stanley T.
Siemens Aktiengesellschaft
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