a Find the input resistance output resistance and open circuit voltage gain of

# A find the input resistance output resistance and

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Consider the following BJT amplifier. (a) Find the input resistance, output resistance, and open-circuit voltage gain of the above amplifier. You may ignore the early effect. (b) Design the circuit by selecting the value of to maximize the output swing in other words, the circuit should have a nominal (collector voltage) that is half-way between the value of at the two edges of active mode (active/cut-off and active/saturation). Assume , , , , , , 𝑅 ? 𝑉 ??? 𝑉 𝐼? 𝑅 𝑅 𝑅 𝐸 𝑅 ??

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4 Question 3 Circuit Type CB Amplifier with Bypass Course Topics BJT DC, BJT Small Signal Difficulty Final Exam 2013 Consider the BJT circuit below. (a) Draw a complete small-signal equivalent model for the above circuit. INCLUDE the resistance in this part. You may use either BJT small signal model. (b) You MAY IGNORE in this part. Find expressions for the output resistance, , and the open- circuit voltage gain, , of the above circuit. Simplify your expressions as much as possible. (c) You MAY IGNORE in this part. Find an expression for the input resistance, . Assume that for THIS PART ONLY. Simplify your expressions as much as possible. (d) For a transistor with , resistor values , , , and supply voltage , determine the transistor operating mode, and all transistor currents ( , , and ). Assume that (DC) and that the B E forward drop is 0.7 V.
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