Oscillator with supply voltage changeover according to activated

Details Oscillator with supply voltage changeover according to activated Oscillator with supply voltage changeover according to activated

1992-10-29

1994-06-28

Grimm, Siegfried H.

Oscillators

Plural oscillators

331116FE, 331158, 331186, 364934, 364DIG2, 368159, 368204, 395550, 395750, H03B 536, H03L 300

Patent

active

053250745

ABSTRACT:
A microcomputer in which an oscillating circuit provided therein is activated both when the microcomputer is in an activated state and when it is in a disabled state is provided with a changeover circuit for changing over a supply voltage of the oscillating circuit between when the microcomputer is in the activated state and in the disabled state. The changeover circuit supplies to the oscillating circuit a high voltage when the microcomputer is in the activated state and a low voltage when the microcomputer is in the disabled state. As a result, the starting characteristic when the power is turned on is not deteriorated. Further, the power consumption of the oscillating circuit when the microcomputer is in the disabled state is reduced.

REFERENCES:
patent: 4641109 (1987-02-01), Yokouchi
patent: 5126695 (1992-06-01), Abe
patent: 5155453 (1992-10-01), Ruetz

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