Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1978-06-27
1980-06-24
Hix, L. T.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307297, 323 22T, H02J 906, H03K 114
Patent
active
042097100
ABSTRACT:
In an energization circuit for a memory module, the primary energization is derived from a primary power supply source fed through an isolating diode to a regulating circuit. The regulating circuit includes a series regulator device such as a darlington amplifier. A voltage detector module is provided which is characterized in very accurate operation while drawing a negligible amount of current for its own operation. The output of the voltage detector is used to control the operation of the series regulator. A stand-by, or back-up, power supply, which may be a battery is connected to the regulator circuit through a further isolating diode. The sensing circuit for the voltage detector module is so arranged that, when the primary power supply is operational, one level of output voltage for the regulator will be required to effect a controlled operation of the voltage detector; and when the back-up power supply is operational, a different voltage level output signal is required to effect a corresponding control of the voltage detector module.
REFERENCES:
patent: 3778634 (1973-12-01), Hanrihan
patent: 3816768 (1974-06-01), Stein
patent: 3912940 (1975-10-01), Vince
patent: 3916294 (1975-10-01), Kennedy
patent: 3979610 (1976-09-01), Gordon
patent: 4065676 (1977-12-01), Elias
Micropower Voltage Detector-Design Spec. ICL8211, ICL8212, Intersil, pp. 63-72.
Burton Lockwood D.
Hix L. T,.
Honeywell Inc.
Marhoefer Laurence J.
Schreyer S. D.
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