Q4. Find the input impedance of the circuit
The BJT transistor circuit below is shown with its parasitic capacitance C_{\pi} , C_{\mu} and C_{ ext{CS}} . Find the input impedance Z_{in}(s) using Miller's theorem. Assume \beta and g_m given for this setup. Here s is the Laplace variable.

Question

Q4. Find the input impedance of the circuit 
 The BJT transistor circuit below is shown with its parasitic capacitance   C_{\pi} ,    C_{\mu}  and    C_{	ext{CS}} . Find the input impedance   Z_{in}(s)  using Miller's theorem. Assume   \beta  and   g_m  given for this setup. Here   s  is the Laplace variable.

Answer

Z_{in} (s)= \frac{1}{sC_{\pi}}  +   \frac{\beta}{g_m}   +   \frac{sC_{	ext{CS}}}{sC_{\mu}(sC_{	ext{CS}} +\beta)}

Answer

Z_{in} (s)= \frac{1}{sC_{\pi}}  +   \frac{\beta}{g_m}   +   \frac{sC_{	ext{CS}}}{sC_{\mu}(sC_{	ext{CS}} +g_m)}

Answer

Z_{in} (s)= \frac{1}{sC_{\pi}}  | |    \frac{\beta}{g_m}   | |   \frac{sC_{	ext{CS}}}{sC_{\mu}(sC_{	ext{CS}} +g_m)}

Answer

Z_{in} (s)= \frac{\beta}{sC_{\pi}}  | |    \frac{1}{g_m}   | |   \frac{sC_{	ext{CS}}}{(sC_{	ext{CS}} +g_m)}

Answer

Z_{in} (s)= \frac{1}{sC_{\pi}}  | |    \frac{1}{g_m}   | |   \frac{sC_{	ext{CS}}}{sC_{\mu}(sC_{	ext{CS}} +\beta)}

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Q4. Find the input impedance of the circuit The BJT transistor circuit below i...

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