Multiple clock switching circuit

Details Multiple clock switching circuit Multiple clock switching circuit

1981-06-15

1983-08-09

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328154, 328 55, 307480, 375107, H03K 526, H03L 700

Patent

active

043981550

ABSTRACT:
A circuit for switching between multiple asynchronous clocks is provided. A synchronizer comprising D-type flip-flops, which are controlled by a clock change signal, are provided for each control signal being switched. Output signals provided by the synchronizers are used to control MOS transistor gates which switch the asynchronous clocks to the circuit output. The synchronizers also control a clamping transistor gate which clamps the circuit output to a reference during a switching operation. An additional synchronizer provides synchronization between the clock change signal and the circuit output allowing the circuit output to be interrupted at a known state.

REFERENCES:
patent: 3029389 (1962-04-01), Morphet
patent: 3996523 (1976-12-01), Schmid
patent: 4039960 (1977-08-01), Clark
patent: 4206414 (1980-06-01), Chapman

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