Digital frequency display device

Details Digital frequency display device Digital frequency display device

1977-02-11

1978-09-12

Griffin, Robert L.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 78D, 324 79D, 324 78F, H04B 126

Patent

active

041141016

ABSTRACT:
A digital frequency display device for digitally displaying the operating frequency of a communication apparatus comprising a reference frequency oscillator, a first frequency mixer for mixing the output frequencies of a first oscillator of the communication apparatus and of the reference frequency oscillator, a second frequency mixer for mixing the output frequency of a second oscillator of the communication apparatus and the resultant frequency provided from the first frequency mixer to produce the display frequency shifted by the reference frequency, and a frequency counter for counting the output frequency from the second frequency mixer and for correcting the shifted frequency component to display the correct frequency.

REFERENCES:
patent: 3938048 (1976-02-01), Elliott

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