公开(公告)号：US20120293353A1

公开(公告)日：2012-11-22

申请号：US13468126

申请日：2012-05-10

申请人： Atsushi OKUMURA ,  Ryusuke Sahara ,  Mitsugi Kusunoki

发明人： Atsushi OKUMURA ,  Ryusuke Sahara ,  Mitsugi Kusunoki

IPC分类号： H03M1/66 ,  H03F1/34

CPC分类号： H03F3/45475 ,  H03F3/45928 ,  H03F2200/447 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03F2203/45591 ,  H03F2203/45594 ,  H03F2203/45616

摘要： A temperature dependence adjustable operational amplifier circuit which suppresses a change in a gain caused by a change in an input voltage is provided. In an operational amplifier including a first input terminal and an output terminal, an operational amplifier having an inverting input terminal and a non-inverting input terminal, an input resistance circuit, and a feedback resistance circuit, each of the input and feedback resistor circuits has a resistor and a trimming resistor, which are different in temperature coefficient from each other, connected in series with each other, and a source-drain path of a MOS transistor included in the trimming resistor circuit is disposed between resistance and an inverting input terminal, and a substrate potential thereof is set to a potential of the inverting input terminal of the operational amplifier.

摘要翻译： 提供了抑制由输入电压变化引起的增益变化的温度依赖性可调运算放大器电路。 在包括第一输入端子和输出端子的运算放大器中，具有反相输入端子和非反相输入端子的运算放大器，输入电阻电路和反馈电阻电路，每个输入和反馈电阻电路具有 电阻和微调电阻彼此串联连接的温度系数彼此不同，并且包括在微调电阻电路中的MOS晶体管的源极 - 漏极路径被设置在电阻和反相输入端之间， 并且其衬底电位被设置为运算放大器的反相输入端的电位。