Voltage regulator usable without discrimination between input an

Details Voltage regulator usable without discrimination between input an Voltage regulator usable without discrimination between input an

1997-07-25

1998-10-27

Hecker, Stuart N.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

G05F 140

Patent

active

058282084

ABSTRACT:
A voltage regulator has a pair of common terminals (101, 102) and a pair of rectifying diodes (103, 104) which are connected to the common terminals, respectively. The rectifying diodes supplies an input voltage which is supplied to one of the common terminals to a connecting point (105) of the rectifying diodes. Resistors (107, 108, 109, 110), a comparator (111), and a switch (112) selectively couple a dividing resistor (17) with one of the common terminals that is not supplied with the input voltage. A MOSFET (106) is connected to the common terminals so as to amplify an input voltage supplied to one of the common terminals and so as to provide an output voltage to the other terminal. A constant current source (14), a start up circuit (15), a reference voltage producing circuit (16), an error amplifier (19) control the MOSFET so that a reference voltage V.sub.REF produced by the reference voltage producing circuit is equal to a divided voltage V.sub.O produced by dividing resistor (17,18).

REFERENCES:
patent: 5397976 (1995-03-01), Madden et al.
patent: 5469046 (1995-11-01), Wong et al.
patent: 5604426 (1997-02-01), Okamura et al.

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