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A gain-variable amplifier circuit using the turn-on resistance characteristic of NMOS transistor
A gain-variable amplifier circuit using the turn-on resistance characteristic of NMOS transistor
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机译：利用NMOS晶体管的导通电阻特性的增益可变放大器电路
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摘要
In the present invention, when various internal characteristics such as PSRR, CMRR, CMR, and offset of a general operational amplifier are used for various purposes such as signal amplification and current driving capability, The present invention relates to a gain variable amplifier circuit capable of adjusting a gain by varying a voltage applied to a gate of an operational amplifier having differential amplifier means, gain means and compensation means, And a feedback resistor between the terminal and the output terminal is constituted by connecting an N-MOS transistor having a variable turn-on resistance according to a difference in gate applied voltage to a variable turn-on resistance of the N-MOS transistor.
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