Question

For the circuit shown below $V_T = 0.026$ V and the transistor has a $\beta = 100$. Considering that all capacitors at midband conditions act as short circuits. Using the hybrid-$\pi$ small signal model for the BJT transistor determine: a) This amplifier's voltage gain: $A_v = \frac{v_o}{v_{sig}}$ b) The input resistance $R_{in}$ c) If the 250 $\Omega$ resistor is replaced with a wire what will be the new voltage gain?

          For the circuit shown below $V_T = 0.026$ V and the transistor has a $\beta = 100$. Considering that all capacitors at
midband conditions act as short circuits. Using the hybrid-$\pi$ small signal model for the BJT transistor determine:
a) This amplifier's voltage gain: $A_v = \frac{v_o}{v_{sig}}$
b) The input resistance $R_{in}$
c) If the 250 $\Omega$ resistor is replaced with a wire what will be the new voltage gain?

For the circuit shown below VT = 0.026 V and the transistor has a β = 100. Considering that all capacitors at
midband conditions act as short circuits. Using the hybrid-π small signal model for the BJT transistor determine:
a) This amplifier's voltage gain: Av = (vo)/(vsig)
b) The input resistance Rin
c) If the 250 Ω resistor is replaced with a wire what will be the new voltage gain?

Added by Rachel G.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

08/19/2023

Step 1

Given that the transistor has a β = 100, we can calculate the transconductance (gm) of the transistor using the formula gm = β / (V_T), where V_T = 0.026V. gm = 100 / 0.026 = 3846.15 mS The voltage gain (Av) of the amplifier can be calculated using the formula Show more…

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For the circuit shown below, V_T = 0.026V, and the transistor has a β = 100. Considering that all capacitors at midband conditions act as short circuits. Using the hybrid-π small signal model for the BJT transistor, determine: a) This amplifier's voltage gain: Av = (vo) / (vsig) b) The input resistance Rin c) If the 250Ω resistor is replaced with a wire, what will be the new voltage gain? able[[Av,],[Rin,],[vo,],[Av,new,]]