A feedback amplifier is shown in Fig 8 49 Device data are as follows Icirc sup2 npn 200, Icirc sup2 pnp 100, V BE(on) 0 7V, r b 0, and V A If the dc input voltage is zero, calculate the overall gain v o v i , the loop gain, and the input and output impedance at low frequencies Compare your answers ...

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A feedback amplifier is shown in Fig. 8.49. Device data are as follows: Î² npn = 200,

Question:

A feedback amplifier is shown in Fig. 8.49. Device data are as follows: Î²_npn= 200, Î²_pnp= 100, |V_BE(on)| = 0.7V, r_b= 0, and |V_A| = ˆž. If the dc input voltage is zero, calculate the overall gain v_o/v_i, the loop gain, and the input and output impedance at low frequencies. Compare your answers with a SPICE simulation. Also use SPICE to plot the complete large-signal transfer characteristic and find the second and third harmonic distortion in v_ofor a sinusoidal input voltage with peak-peak amplitude of 0.5 V at v_i.

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