Single-power ADC differential drive circuit

The utility model provides a single power supply ADC differential drive circuit comprising an input signal buffer processing circuit U1, a common mode voltage buffer processing circuit U4, a single-ended to differential circuit U2, a single-ended to differential circuit U3, a resistor R1, a resistor...

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Bibliographische Detailangaben
1. Verfasser: ZENG HUAXIONG
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The utility model provides a single power supply ADC differential drive circuit comprising an input signal buffer processing circuit U1, a common mode voltage buffer processing circuit U4, a single-ended to differential circuit U2, a single-ended to differential circuit U3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and a resistor R9. According to the embodiment of the invention, the independent operational amplifier is adopted to realize single-power supply, single-end analog input is converted into ADC differential input, the ADC input common-mode voltage can be set to be an optimal value, and the single-power-supply analog-to-digital converter can replace a current imported differential amplifier and is adaptive to various differential input ADCs. 本实用新型提供了一种单电源ADC差分驱动电路,包括:输入信号缓冲处理电路U1、共模电压缓冲处理电路U4、单端转差分电路U2、单端转差分电路U3,以及电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、电阻R6、电阻R7、电阻R8和电阻R9。本实施例采用独立运放实现单电源供电,单端模拟输入转换为ADC差分输入,ADC输入共模电压可设置为最佳值,可以替换目前进口差分放大器,适配