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Driving method for obtaining a gain linear variation of a transconductance amplifier and corresponding driving circuit
Driving method for obtaining a gain linear variation of a transconductance amplifier and corresponding driving circuit
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机译:获得跨导放大器的增益线性变化的驱动方法及相应的驱动电路
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摘要
The disclosure relates to a driving method for obtaining a linear gain variation of a transconductance amplifier that includes a first differential transistor cell, with adjustment of a driving voltage value of a degenerative driving transistor of the transconductance amplifier The method includes generating an output current signal of a second differential cell corresponding to the first differential transistor cell of the transconductance amplifier, the output current signal having a linear relationship with a transconductance value of the second differential cell as the driving voltage varies; generating a reference current signal having a linear relationship with a differential input voltage; comparing the output current signal and the reference current signal for adjusting the driving voltage value; and modifying the transconductance value of the second differential cell up to a balance of the current signals.
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