Shanghai Analogy Semiconductor Technology Ltd.

Zhian Zhang

Jun Zhang

The present application discloses a trimming circuit of differential amplifier, wherein an output end of the differential amplifier is coupled to a first input end of the differential amplifier through a first voltage-dividing resistor; a shift voltage is coupled to a second input end of the differential amplifier through a second voltage-dividing resistor; the first voltage-dividing resistor and the second voltage-dividing resistor respectively form a T-shaped resistor network structure; the T-shaped resistor network structure comprises: a k-bit resistive network coupled to a T-shaped node and a reference power supply end, wherein a low n-bits of the k-bit resistive network is an R-2R resistive network, and part of branches are connected in series with at least one trimming resistor, and each trimming resistor is connected in parallel with a switch.

Trimming circuit of differential amplifier

A digital-to-analog conversion circuit, comprising: an R&#x2212;2R resistive network () configured to be connected between an output end and a ground end; an output voltage selection unit () configured to be connected between the output end of the R&#x2212;2R resistive network () and a voltage output terminal; an output voltage trimming unit (), wherein the output voltage trimming unit () is provided between a 2R resistor on at least one branch of the R&#x2212;2R resistive network () and the ground end.

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Shanghai, China

Zhian Zhang