Power reduction circuit

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage

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327374, 326 17, G05F 110

Patent

active

060492457

ABSTRACT:
A power reduction circuit is provided that includes a first switching device between a first operating voltage terminal and a second operating voltage terminal being controlled by a first active signal. A second switching device is between a third operating voltage terminal and a fourth operating voltage terminal is controlled by the inverse active signal. A signal transfer gate logic coupled between the second and the fourth operating voltage terminals to selectively output one of the second and the fourth operating voltages. A first voltage drop device is between the first and the second operating voltage terminals and is selectively activated by a first control device according to one of a first and a second operating modes. A second voltage drop device is between the third and the fourth operating voltage terminals and is selectively activated by a second control device according to one of the first and the second operating modes. The first and second voltage drop devices have predetermined turn-on resistances. The power reduction circuit provides for each mode and a high-speed operation for switching from the standby mode to the active mode.

REFERENCES:
patent: 5274601 (1993-12-01), Kawahara et al.
patent: 5583457 (1996-12-01), Horiguchi et al.
patent: 5614847 (1997-03-01), Kawahara et al.
patent: 5781062 (1998-07-01), Mashiko et al.
patent: 5821769 (1998-10-01), Douseki
patent: 5828235 (1998-10-01), Horiguchi et al.

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