2. Draw the normalized de transfer characteristic (va versus ic1,2/IQ) plot for a BJT differential amplifier following the 2 equations: ic₁ =IQ/(1+edVT) ic2 = IQ/(1+e+vVT) Find the forward transconductance, gffor a linear approximation of the plot at va =0. Prove the expression for the linear approximation: ici (linear) = 0.5IQ + (IQ/4VT)Vd. Following the transfer characteristic determine the maximum differential mode input signal Va (max) such that the difference between the linear approximation and the actual curve is 5%.

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2. Draw the normalized de transfer characteristic (va versus ic1,2/IQ) plot for a BJT differential
amplifier following the 2 equations:
ic₁ =IQ/(1+edVT)
ic2 = IQ/(1+e+vVT)
Find the forward transconductance, gffor a linear approximation of the plot at va =0.
Prove the expression for the linear approximation: ici (linear) = 0.5IQ + (IQ/4VT)Vd.
Following the transfer characteristic determine the maximum differential mode input signal
Va (max) such that the difference between the linear approximation and the actual curve is
5%.
Transcribed Image Text:2. Draw the normalized de transfer characteristic (va versus ic1,2/IQ) plot for a BJT differential amplifier following the 2 equations: ic₁ =IQ/(1+edVT) ic2 = IQ/(1+e+vVT) Find the forward transconductance, gffor a linear approximation of the plot at va =0. Prove the expression for the linear approximation: ici (linear) = 0.5IQ + (IQ/4VT)Vd. Following the transfer characteristic determine the maximum differential mode input signal Va (max) such that the difference between the linear approximation and the actual curve is 5%.
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