Power down circuit for use in intergrated circuits

Details Power down circuit for use in intergrated circuits Power down circuit for use in intergrated circuits

1995-05-12

1996-12-24

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327545, 327143, 327198, G05F 110, H03K 1722

Patent

active

055876846

ABSTRACT:
A method of including power control features to analog integrated circuits does not require the addition of separate power control input signal pin(s). One or more existing externally applied reference signals are sensed to determine if the signals are within specified operational limits. When the reference signals are outside of the operational limits the internal circuit blocks are switched off to their non-power dissipating state. When the reference signals are within the operational limits the internal circuit blocks are switched on to their normal operating state. This switching can be accomplished in various ways, including but not limited to a single switch in a series with the power supply or many distributed switches in each circuit block or stage.

REFERENCES:
patent: 4428020 (1984-01-01), Blanchard, Jr.
patent: 4473762 (1984-09-01), Iwahashi et al.
patent: 4599672 (1986-07-01), Planer et al.
patent: 4774497 (1988-09-01), Taylor
patent: 5130580 (1992-07-01), Min et al.
patent: 5373227 (1994-12-01), Keeth
patent: 5394104 (1995-02-01), Lee
patent: 5420539 (1995-05-01), Fensch
patent: 5434533 (1995-07-01), Furutani

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