Current reference circuit
A current reference and reference current technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of collector voltage deviation, current mirror current mismatch, and inability to accurately offset, so as to achieve accurate voltage equalization and increase Good effect of PSRR and temperature coefficient
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[0026] Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail:
[0027] Such as image 3 As shown, a current reference circuit proposed by the present invention includes a first current reference unit, a second current reference unit and a maximum current selection circuit, and the output end of the first current reference unit is connected to the first current selection circuit of the maximum current selection circuit. The input terminal is connected, the output terminal of the second current reference unit is connected to the second input terminal of the maximum current selection circuit, and the output terminal of the maximum current selection circuit is the output terminal of the current reference circuit; wherein,
[0028] The first current reference unit and the second current reference unit are used to generate an independent reference current output respectively, and the reference current generated by the first curr...
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