Differential Amplifier Calculator
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The wideband differential amplifier has high gain and high band
width. It overcomes the Miller capacitance limitations of the common
emitter amplifier by tying the collector of Q1, and the base of Q2 to
signal ground. As a result it can achieve gain bandwidths orders of
magnitude larger than the common emitter amplifiers. The only cost
is that a second transistor is needed.
This calculator computes bias voltage and current
levels, as well as gain and frequency response.
VC= VP - IC*RC/2
gm = Ic/25mA
The lower pole is dominate:
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