Level conversion circuit and control method

Abstract

The invention discloses a level conversion circuit and a control method, and the circuit comprises a parasitic capacitance circuit which is used for generating a first common-mode current to a first current mirror circuit based on the voltage change of a first floating voltage point, and generating a second common-mode current to a second current mirror circuit; the common-mode current difference compensation circuit is used for generating detection current based on the voltage change of a first floating voltage point, the detection current forms compensation current through the bias current generation circuit, and the compensation current is compensated to the first current mirror circuit or the second current mirror circuit; and the output circuit is used for outputting a target level corresponding to the input signal according to an output voltage, and the output voltage is generated at the output end of the first current mirror circuit or the second current mirror circuit. According to the technical scheme, the common-mode current difference caused by parasitic capacitance mismatch is effectively compensated by using the common-mode current difference compensation circuit, and the accuracy and reliability of signal transmission of the level conversion circuit are ensured.

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