Bandgap reference circuit

Details Bandgap reference circuit Bandgap reference circuit

2007-10-16

2007-10-16

Lam, Tuan T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S545000, C327S546000, C323S313000

Reexamination Certificate

active

11037389

ABSTRACT:
A bandgap reference circuit is proposed. To remove parasitic effects, this includes the combination of a first circuit section (1), which generates a temperature-proportional voltage, and a second circuit section (2), which generates an inversely temperature-proportional voltage. The bandgap reference circuit generates a bandgap reference voltage (Ubg) as the sum of the temperature-proportional voltage of the first circuit section (1) and the inversely temperature-proportional voltage of the second circuit section (2). To remove the parasitic effects, both circuit sections (1, 2) include bipolar transistor circuits with multiple bipolar transistors (Q1-Q4; Q5-Q8), so that both the temperature-proportional voltage and the inversely temperature-proportional voltage are generated in the form of a sum and difference formation of multiple base-emitter voltages of the appropriate bipolar transistors.

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