Question

Q3) The figure below shows the small signal equivalent circuit of a single stage transistor amplifier. The transistor has the following small signal parameters: $h_{ie} = 3k\Omega$, $h_{fe} = 90$ a) The input signal to the amplifier, $V_i$, is a sinewave of 10mV amplitude at a frequency of 1kHz. Assuming that the reactance of $C_1$ is small at 1kHz, calculate i) The amplitude of the output signal $V_o$. ii) The amplitude of the output signal $V_o$ when the output of the amplifier is connected to a further circuit that has an input impedance of $10k\Omega$. (b) Calculate a value for $C_1$ if the above amplifier is to have a low frequency cut-off of 40Hz.

          Q3) The figure below shows the small signal equivalent circuit of a single stage transistor amplifier. The transistor has the following small signal parameters: $h_{ie} = 3k\Omega$, $h_{fe} = 90$

a) The input signal to the amplifier, $V_i$, is a sinewave of 10mV amplitude at a frequency of 1kHz. Assuming that the reactance of $C_1$ is small at 1kHz, calculate

i) The amplitude of the output signal $V_o$.

ii) The amplitude of the output signal $V_o$ when the output of the amplifier is connected to a further circuit that has an input impedance of $10k\Omega$.

(b) Calculate a value for $C_1$ if the above amplifier is to have a low frequency cut-off of 40Hz.

q3 the figure below shows the small signal equivalent circuit of a single stage transistor amplifier the transistor has the following small signal parameters hie 3komega hfe 90 a the input 55176

Added by Mar P.

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