Bandgap voltage reference circuit

Details Bandgap voltage reference circuit Bandgap voltage reference circuit

2008-11-30

2010-10-12

Lam, Tuan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S540000, C327S541000, C327S543000, C323S313000, C323S316000

Reexamination Certificate

active

07812663

ABSTRACT:
A bandgap voltage reference circuit includes an operational amplifier, a first transistor, a second transistor, a third transistor, a first resistor, a second resistor, a first diode, a second diode, and a divider. The first transistor, the second transistor, and the third transistor form current mirrors. The reference current of the current mirrors is generated according to the first diode, the second diode, and the first resistor. The reference voltage of the voltage reference circuit is output from the first end of the second resistor. The divider is coupled to the second end of the second resistor so that the reference voltage of the voltage reference circuit can be reduced.

REFERENCES:
patent: 6075407 (2000-06-01), Doyle
patent: 6563371 (2003-05-01), Buckley et al.
patent: 7411380 (2008-08-01), Chang et al.
patent: 7495505 (2009-02-01), Chang et al.
patent: 7570107 (2009-08-01), Kim et al.
patent: 2005/0206443 (2005-09-01), Chatal et al.
patent: 2008/0042737 (2008-02-01), Kim et al.
patent: 2009/0174468 (2009-07-01), Yoshida et al.
patent: 2009/0189591 (2009-07-01), Sperling et al.

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