Title:
【発明の名称】バイアス供給回路と電力遮断回路とが結合された集積回路
Document Type and Number:
Japanese Patent JP3484191
Kind Code:
B2
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. Ths 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 switch 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.
Inventors:
Moin Russell Earl Jr.
Suter Richard Earl
Suter Richard Earl
Application Number:
JP51104290A
Publication Date:
January 06, 2004
Filing Date:
July 13, 1990
Export Citation:
Assignee:
Hattori Seiko Co., Ltd.
Seiko Epson Corporation
Seiko Epson Corporation
International Classes:
G04G99/00; G05F1/56; G05F3/26; G05F3/30; G08B21/00; H02J1/00; H02J7/00; H04B1/16; (IPC1-7): G05F3/30; G05F1/56; G05F3/26
Domestic Patent References:
| JP62210724A | ||||
| JP1154610A |
Attorney, Agent or Firm:
Minoru Nakamura (5 others)