Reference voltage generating circuit

Details Reference voltage generating circuit Reference voltage generating circuit

1998-06-23

1999-07-20

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327513, 323315, G05F 316, G05F 110

Patent

active

059260629

ABSTRACT:
A reference voltage generating circuit includes a constant current circuit, a current mirror circuit, and a load resistor. The constant current circuit generates a constant current proportional to a thermal electromotive force. The current mirror circuit uses the constant current generated by the constant current circuit as a reference current. The load resistor converts the output current of the current mirror circuit into a voltage. The current mirror circuit is constituted by a first transistor having a collector connected to the constant current circuit, a first resistor having one terminal connected to the emitter of the first transistor, a second transistor having a base connected to the base of the first transistor and a collector connected to the load resistor, a second resistor having one terminal connected to the emitter of the second transistor, a third transistor having a base connected to the collector of the first transistor and an emitter connected to the bases of the first and second transistors, and a third resistor connecting the base and emitter of the first transistor.

REFERENCES:
patent: 5430395 (1995-07-01), Ichimaru
patent: 5594382 (1997-01-01), Kato et al.
patent: 5619163 (1997-04-01), Koo
patent: 5637993 (1997-06-01), Whitney et al.
patent: 5644269 (1997-07-01), Wong et al.
patent: 5783936 (1998-07-01), Girard et al.
patent: 5815012 (1998-09-01), Rivoir et al.

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