Digital-to-analog converter output circuit and digital-to-analog converter
By introducing a combination of a current inverting unit and a transimpedance amplifier unit into the output circuit of the digital-to-analog converter, analog positive and negative voltage signal outputs are achieved using only one transimpedance amplifier, solving the problems of high power consumption and output deviation in the prior art, and realizing low power consumption, low cost and high accuracy output.
CN116260465BActive Publication Date: 2026-06-19上海米硅科技有限公司
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 上海米硅科技有限公司
- Filing Date
- 2023-03-21
- Publication Date
- 2026-06-19
Smart Images
Figure CN116260465B_ABST
Abstract
This application provides a digital-to-analog converter (DAC) output circuit and a DAC. The output circuit includes: a first switching unit, a second switching unit, a current inverting unit, and a transimpedance amplifier unit. A first terminal of the first switching unit is used to receive an analog current signal, and a second terminal of the first switching unit is connected to the input terminal of the transimpedance amplifier unit. A first terminal of the second switching unit is used to receive an analog current signal, and a second terminal of the second switching unit is connected to the first terminal of the current inverting unit. A third terminal of the second switching unit is connected to the second terminal of the current inverting unit, and a fourth terminal of the second switching unit is connected to the input terminal of the transimpedance amplifier unit. This application can significantly reduce the power consumption of the output circuit and also avoid deviations between the output voltage of the transimpedance amplifier unit and the output voltage of the output port.
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