Symmetrical waveform signal generator having coherent frequency

Details Symmetrical waveform signal generator having coherent frequency Symmetrical waveform signal generator having coherent frequency

1980-04-10

1982-03-02

Smith, Alfred E.

328 14, H03K 384, H03K 2900, H03B 1900

Patent

active

043180450

ABSTRACT:
An apparatus for generating a signal having symmetrical waveform of frequency selectable according to a plurality of input signals. The frequency of the signal changes rapidly in response to changes in the input signals, and frequency changes occur in a coherent manner, with no perturbation of the output signal. A high speed clocking signal and the signals generated by its successive divisions are logically combined to produce a plurality of signals which are filtered to produce substantially symmetrical waveform signals which are maintained in periodic phase coherence. Under control of frequency select input signals, a selected one of the substantially symmetrical waveform signals is gated into a divider which provides a symmetrical waveform output signal having the selected frequency.

REFERENCES:
patent: 3702441 (1972-11-01), Thrower
patent: 3982199 (1976-09-01), Green
patent: 4025865 (1977-05-01), Munday

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