Method and apparatus for a sweep oscillator

Details Method and apparatus for a sweep oscillator Method and apparatus for a sweep oscillator

1991-11-18

1993-07-06

Mis, David

Oscillators

With frequency adjusting means

Cyclic frequency sweeping means

331 4, 331 17, 331 74, H03B 2300, H03L 708

Patent

active

052257940

ABSTRACT:
A method and apparatus for a sweep oscillator and a spectrum analyzer containing the sweep oscillator having a precisely determined center frequency includes a sweep circuit having a sawtooth waveform, a reference oscillator, a microprocessor controller and a modified phase-locked loop. The modified phase-locked loop further includes a control signal summer, a voltage controlled oscillator coupled to the control signal summer, a sweep oscillator output, and a sample and hold circuit including a switching circuit.

REFERENCES:
patent: 4001726 (1977-01-01), Sanford, Jr. et al.
patent: 4130808 (1978-12-01), Marzalek
patent: 4316154 (1982-02-01), Krause

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