Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-02-02
1997-07-15
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340661, 340664, 364483, 364426015, G08B 2100
Patent
active
056487592
ABSTRACT:
A voltage regulator, a device driver, and a warning signal driver are provided on a single voltage regulator integrated circuit. The voltage regulator provides a regulated voltage for external logic such as a microcontroller. The device driver selectively turns on or turns off an external device such as a relay. The warning signal driver outputs a warning signal. The integrated circuit contains sensing circuits which sense if the output voltage is out of proper regulation. In the event of a malfunction, for example when the output voltage is outside a desired voltage range, the device driver shuts off the external device and the warning signal driver generates a warning signal. The integrated circuit may also receive signals from the external logic which cause the integrated circuit to shut off the device or to generate a warning signal.
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Miller Roger L.
Regan Timothy T.
Hofsass Jeffery
Lieu Julie B.
National Semiconductor Corporation
Wallace T. Lester
Winters Paul J.
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