Apparatus for synchronously switching frequency source

Details Apparatus for synchronously switching frequency source Apparatus for synchronously switching frequency source

1987-12-22

1989-08-08

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307480, 307510, 307522, 307524, 307527, 307582, 328 72, 328 63, H03K 513, H03K 906, H03K 117, H03K 1700

Patent

active

048556165

ABSTRACT:
A circuit responsive to a switching signal for dynamically changing the frequency source of a system clock. The circuit allows addition of new frequency sources without substantial changes to the circuit because its circuitry for detecting an inactive cycle period of the new frequency source is asynchronous (i.e. not clocked by the new frequency source).

REFERENCES:
patent: 3904977 (1975-09-01), Barsotti
patent: 3932816 (1976-01-01), McGregor
patent: 4156200 (1979-05-01), Gomez
patent: 4229699 (1980-10-01), Frissell
patent: 4398155 (1983-08-01), Atwell, Jr. et al.
patent: 4419629 (1983-12-01), O'Brien
patent: 4748417 (1988-05-01), Spengler

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