Electrical computers and digital processing systems: support – Computer power control
Patent
1998-11-30
2000-09-12
Ray, Gopal C.
Electrical computers and digital processing systems: support
Computer power control
713340, 324522, 327143, 348730, G06F 130, H02M 700, H01F 1900
Patent
active
061192384
ABSTRACT:
An apparatus, for generating a power OFF/ON signal for a microprocessor which receives operating power from a secondary winding of a transformer, includes a detector for detecting the input voltage of the transformer. When this input voltage drops below a given threshold level, a low voltage detection circuit provided by the apparatus generates the power OFF/ON signal for the microprocessor. By detecting the input voltage as opposed to the operating power of the microprocessor, the apparatus allows the microprocessor sufficient time to perform its shut-down functions before the operating power drops below a minimum level.
REFERENCES:
patent: 4591914 (1986-05-01), Hakamada et al.
patent: 5446404 (1995-08-01), Badyal et al.
patent: 5682748 (1997-11-01), DeVilbiss et al.
patent: 5946209 (1999-08-01), Eckel et al.
EPO Search Report, Mar. 2000.
Erickson Earl J.
Jennings James R.
Goodman Edward W.
Philips Electronics North America Corporation
Ray Gopal C.
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