Control circuits of collector current of substrate bipolar junction transistors and circuits of compensating for base current for generating a proportional to absolute temperature (PTAT) voltage using the control circuits
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United States of America Patent
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Mar 6, 2018
Grant Date -
Jan 4, 2018
app pub date -
Jan 31, 2017
filing date -
Jul 1, 2016
priority date (Note) -
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Abstract
A circuit for controlling a collector current of a substrate bipolar junction transistor (BJT) is provided. The circuit includes a first current mirror configured to generate a first mirroring base current corresponding to a replicate current of a base current of the substrate BJT, a current transmitter configured to transmit the first mirroring base current, a second current mirror configured to generate a second mirroring base current corresponding to a replicate current of the first mirroring base current received from the current transmitter and configured to supply the second mirroring base current to an emitter of the substrate BJT, and a current source configured to supply a drive current corresponding to a collector current of the substrate BJT to the emitter of the substrate BJT.
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