Bandgap reference circuit
A reference circuit and reference voltage technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as poor driving ability and easy drop of reference voltage VBG
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[0039] Such as figure 2 Shown is a schematic structural diagram of the bandgap reference source of the embodiment of the present invention; the bandgap reference circuit of the embodiment of the present invention includes: a start-up circuit 1, a PTAT current generation circuit 2, and an output buffer and reference voltage generation circuit 3.
[0040] The start-up circuit 1 is connected to the PTAT current generating circuit 2 and provides a start-up current when the bandgap reference circuit is turned on.
[0041] The PTAT current generating circuit 2 outputs a first current I 1 , and the first current I 1 is a PTAT current.
[0042] Described output buffering and reference voltage generation circuit 3 comprise:
[0043] The first triode Q1 and the second triode Q2, the first triode Q1 is connected to form a diode structure in which the base and the collector are short-circuited, and the second triode Q2 is connected to form the base and the collector shorted diode struc...
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Abstract
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