Capacitively-coupled amplifier with improved low frequency response

作者: John M. Heumann , Thomas F. Uhling , Ronald J. Peiffer

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摘要: A capacitively-coupled amplifier circuit includes an for receiving input signal via a coupling capacitance and amplifying the to produce output signal. resistor provides bias voltage amplifier. The is bootstrapped using positive feedback with loop gain of slightly less than one. bootstrapping causes increase in value lower cut-in (pole) frequency or roll-off at below This prevents phase shift from adversely effecting high response resulting exhibits wide passband excellent low despite having capacitively coupled

参考文章(1)
Ed O. Schlotzhauer, John M. Heumann, David T. Crook, John E. McDermid, Ronald J. Peiffer, Capacitively-coupled test probe ,(1992)