Combined bias supply and power shut-off circuit with selective b

Details Combined bias supply and power shut-off circuit with selective b Combined bias supply and power shut-off circuit with selective b

1990-12-21

1991-09-03

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072961, 307592, 365227, H03K 301, H03K 513

Patent

active

050457179

ABSTRACT:
A microcircuit bias-current supply in a wristwatch-pager. An FM-radio receiver in a microcircuit paging device operates intermittently with a short on-time and long off-time to reduce power consumption and preserve battery life. The bias-supply circuit distributes predetermined bias currents to a plurality of functional circuit areas of the microcircuit die, the bias currents being disabled during off-time of the receiver such that the current drain of the entire microcircuit is virtually zero, being in the range of nanoamps. The inefficiencies and disadvantages of a series switch to stitch power on and off are eliminated by providing a plurality of switched current sources which perform the dual function of circuit biasing and current switching.

REFERENCES:
patent: 4323881 (1982-04-01), Mori
patent: 4645953 (1987-02-01), Wong
patent: 4999519 (1991-03-01), Kitsukawa et al.

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