Band gap reference voltage generation circuit

Details Band gap reference voltage generation circuit Band gap reference voltage generation circuit

2006-12-27

2009-10-13

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S541000

Reexamination Certificate

active

07602236

ABSTRACT:
There is provided a band gap reference voltage generation circuit capable of reducing wake up time during transition from an idle mode to a normal mode and further capable of removing the RF noise of an output voltage. The band gap reference voltage generation circuit includes an operation amplifier for outputting a uniform voltage in accordance with a reference voltage input to an inversion terminal and a non-inversion terminal; a first-type first transistor for outputting a power source voltage in accordance a power down signal; a first-type second transistor for outputting bias current corresponding to an output voltage from the operation amplifier using an output voltage from the first-type first transistor; a reference voltage circuit for supplying a reference voltage to the inversion terminal and the non-inversion terminal using the bias current; a second-type first transistor different from the first-type first transistor for supplying a base voltage to the output port of the operation amplifier in accordance with the power down signal; a start up circuit for driving the entire circuit during power up; a first node between the second-type second transistor and the reference voltage circuit; and an output terminal connected to the first node.

REFERENCES:
patent: 5818292 (1998-10-01), Slemmer
patent: 5900773 (1999-05-01), Susak
patent: 6121813 (2000-09-01), Furuchi
patent: 6707343 (2004-03-01), Franca-Neto
patent: 6774711 (2004-08-01), Bernard
patent: 7148672 (2006-12-01), Holmes
patent: 7199646 (2007-04-01), Zupcau et al.
patent: 7397279 (2008-07-01), Bhattacharya et al.

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