Reference voltage generating circuit

Details Reference voltage generating circuit Reference voltage generating circuit

1986-01-10

1987-01-20

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

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

323280, 323314, G05F 320

Patent

active

046382399

ABSTRACT:
A reference voltage generating circuit has a control transistor whose collector-emitter path is connected between the output terminal and an input terminal, first and second resistors connected in series with the collector-emitter path of a current detection transistor between the output terminal and ground with the base of the current detection transistor being connected to a connection point between the first and second resistors, a third transistor whose base-emitter path is connected in parallel to the collector-emitter path of the current detection transistor and which has an emitter periphery area n times an emitter periphery area of the current detection transistor, a fourth transistor of the same conductivity type as the current detection transistor and the base of which is connected to the base of the current detection transistor, and a circuit in which a difference between the collector currents of the third transistor and the fourth transistor is detected and a corresponding signal is negatively fed back to the base of the control transistor for ensuring that a constant reference voltage is provided at the output terminal.

REFERENCES:
patent: 4064448 (1977-12-01), Eatock
patent: 4095164 (1978-06-01), Ahmed
patent: 4260946 (1981-04-01), Wheatley, Jr.
patent: 4339707 (1982-07-01), Gorecki
patent: 4559488 (1985-12-01), Minakuchi

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