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发明公开
CN104734648A 差分放大器 有权

差分放大器
摘要：
本发明提供一种差分放大器，包括：运算放大器(OP AMP)，其具有反相输入端子、同相输入端子、反相输出端子和同相输出端子；第一反馈电容器，其与同相输入端子和反相输出端子连接；第二反馈电容器，其与反相输入端子和同相输出端子连接；第一四端子晶体管，其与同相输入端子和反相输出端子连接；第二四端子晶体管，其与反相输入端子和同相输出端子连接。第一晶体管的源极端子和漏极端子中的一个和其栅极端子与反相输出端子连接，源极端子和漏极端子中的另一个和体端子与同相输入端子连接，第二晶体管的源极端子和漏极端子中的一个和其栅极端子与同相输出端子连接，并且源极端子和漏极端子中的另一个和体端子与反相输入端子连接。
摘要（英）：

Provided is a differential amplifier including: an operational amplifier (OP AMP) having an inverting input, a non-inverting input, an inverting output, and a non-inverting output, a first feedback capacitor connected to the non-inverting input and the inverting output. A second feedback capacitor connected to the inverting input and the non-inverting output, a first four-terminal transistor connected to the non-inverting input and the inverting output. A second four-terminal transistor connected to the inverting input and the non-inverting output. One of source and drain of the first transistor and a gate thereof are connected to the inverting output, the other one of the source and drain and a bulk terminal are connected to the non-inverting input, one of source and drain of the second transistor and a gate thereof are connected to the non-inverting output, and the other one of the source and drain terminals and a bulk terminal are connected to the inverting input.

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