# HW_10 - EE338K HOMEWORK Discrete Single Stage Feedback...

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EE338K HOMEWORK ASSIGNMENT #10 Discrete Single Stage Feedback Amplifiers 1. _ + V BB V DD R E R L E s + _ E o R s r π BJT Model β I b I b c b e The circuit above is a discrete BJT single stage feedback amplifier. The values of the components in the circuit are shown in the Multisim file “HW#10_BJT_Feedback_Amplifier.ms8”. The (small) signal model for the BJT is also given. In the model β = 100. The value of the r resistor must be computed from the expression m g r / = where T C m V I g / = (expressions used in EE 438). I C is the DC collector current and V T = 25.88 mV is the thermal voltage at 300 ° K. (a) Perform a simulation with the circuit in the file “HW#10_BJT_Feedback_Amplifier.ms8” with E s = 0 to determine the DC collector current, I C . Use this current in the expressions given above to compute the values g m and r . (b) Using the given BJT Model draw a (small) signal equivalent circuit arranged in the four-box format and identify the topology. (c) Use asymptotic conditions in the equivalent circuit to compute

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HW_10 - EE338K HOMEWORK Discrete Single Stage Feedback...

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