07-07-2023 дата публикации
Номер: CN116400283A
Принадлежит:
The invention discloses a resistance self-correcting circuit and a correcting method. The resistance self-correcting circuit comprises a resistance testing circuit and a current testing circuit, wherein the resistance test circuit is used for connecting a calibration resistor to the current test circuit, and the current test circuit is used for measuring current; the resistance test circuit comprises a switch S1, a switch S2, a first operational amplifier, a second operational amplifier and a test resistor Rcal; the current test circuit comprises a third operational amplifier, a fourth operational amplifier, a switch S3, a switch S4, a switch S5, a switch Sx1 and a test resistor Rx1. According to the method provided by the invention, in a resistor test circuit, the principle of virtual disconnection of an operational amplifier is adopted, so that the current of a tested and measured resistor Rcal is the same as the current of a resistor Rx1, and the resistance value of the resistor Rx1 ...
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