Power-on clearing circuit in semiconductor IC

Details Power-on clearing circuit in semiconductor IC Power-on clearing circuit in semiconductor IC

1991-06-18

1992-12-15

Howell, Janice A.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307594, 307597, 3072965, H03K 1722

Patent

active

051720124

ABSTRACT:
The pulse generator is provided in a semiconductor integrated circuit device, in the form of a power-on clearing circuit. The generator is comprised of a capacitor chargeable to produce a power-on clearing pulse, a current-flow regulating element for regulatively charging the capacitor to output a state signal, and a voltage detector operative in an active condition for monitoring a level of a rising power source voltage to control the current-flow regulating element and being responsive to the state signal to switch to a rest condition. By such construction, a power-on clearing pulse is stably generated regardless of a rising rate of the power source voltage while eliminating a current consumption after completion of the generation of the power-on clearing pulse.

REFERENCES:
patent: 4633107 (1986-12-01), Norsworthy
patent: 4818904 (1989-04-01), Kabayashi
patent: 4873458 (1989-10-01), Yoshida
patent: 4902907 (1990-02-01), Haga et al.
patent: 4922133 (1990-05-01), Iwahashi et al.
patent: 5008566 (1991-04-01), Hashimoto
patent: 5030845 (1991-07-01), Lowe et al.
patent: 5039875 (1991-08-01), Chang

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