Circuit for selective power-down of unused circuitry

Details Circuit for selective power-down of unused circuitry Circuit for selective power-down of unused circuitry

1989-05-08

1990-10-16

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307468, 3072963, 364716, 365227, H03K 19173, H03K 19094

Patent

active

049637690

ABSTRACT:
A power reduction circuit for selectively providing power to circuitry associated with and coupled to the power reduction circuit, which includes two transistors having current paths coupled in parallel and a nonvolatile programmable storage device having a current path coupled in series with the current paths of the two transistors. A control transistor which is also part of the power reduction circuit includes a current path between a power supply and the circuitry associated with and coupled to the power reduction circuit to selectively provide power to the associated circuitry. The control transistor has a control gate electrode which is coupled between the current path of the nonvolatile programmable storage device and the current paths of the two transistors. The state of the storage device controls the state of the control gate electrode of the control transistor and accordingly controls whether the power is supplied to the associated circuitry. The power reduction circuitry consumes essentially zero power during normal operation because either the programmable storage device or the two transistors coupled in series with the current path of this storage device are off, thereby drawing essentially zero power.

REFERENCES:
patent: 3750116 (1973-07-01), Kemerer
patent: 4124899 (1989-04-01), Birkner et al.
patent: 4617479 (1986-10-01), Hartmann et al.
patent: 4670859 (1987-06-01), Furihata et al.
patent: 4774421 (1988-09-01), Hartmann et al.
patent: 4783606 (1988-11-01), Goetling
patent: 4851720 (1989-07-01), Pathak et al.
patent: 4894558 (1990-01-01), Conkle et al.
patent: 4906870 (1990-03-01), Gongwer

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