Precision test frequency generator

Details Precision test frequency generator Precision test frequency generator

1975-07-30

1976-11-16

Kominski, John

Oscillators

Single oscillator with plural output circuits

Plural outputs of diverse wave form

331 51, 328 14, 328186, H03B 1900

Patent

active

039926800

ABSTRACT:
A precision test frequency generator capable of selectively providing a sinusoidal output wave within a frequency range simulating the output of a flowmeter yielding a sinusoidal signal whose frequency is proportional to flow rate, the signal having a noise component superimposed thereon. The generator is constituted by a stable high-frequency standard coupled to a selectable output counter providing intermediate-frequency pulses whose repetition rate is a sub-multiple of the high-frequency standard and a predetermined multiple of the desired output frequency of the generator. The pulses are converted into a triangular wave whose frequency corresponds to the desired output frequency, the triangular wave having a staircase formation whose number of steps is determined by the multiple. The triangular wave is converted into a sinusoidal wave of the same frequency with a staircase modulation component simulating the flowmeter output signal.

REFERENCES:
patent: 3532972 (1970-10-01), Wolfendale
patent: 3581212 (1971-05-01), McMurray
patent: 3657657 (1972-04-01), Jefferson
patent: 3714461 (1973-01-01), Dodson
patent: 3735269 (1973-05-01), Jackson

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