Bandgap voltage reference circuits and methods for producing...

Details Bandgap voltage reference circuits and methods for producing... Bandgap voltage reference circuits and methods for producing...

2011-01-04

2011-01-04

Sterrett, Jeffrey L (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S273000, C323S315000

Reexamination Certificate

active

07863882

ABSTRACT:
A bandgap voltage reference circuit includes a first circuit portion and a second circuit portion. The first circuit portion generates a voltage complimentary to absolute temperature (VCTAT). The second circuit portion generates a voltage proportional to absolute temperature (VPTAT) that is added to the VCTAT to produce a bandgap voltage reference output. The first circuit portion includes a plurality of delta base-emitter voltage (VBE) generators, connected as a plurality of stacks of delta VBE generators. Each delta VBE generator can include a pair of transistors that operate at different current densities and thereby generate a difference in base-emitter voltages (ΔVBE). The plurality of delta VBE generators within each stack are connected to one another, and the plurality of stacks of delta VBE generators are connected to one another, such that the ΔVBEs generated by the plurality of delta VBE generators are arithmetically added to produce the VPTAT.

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