(a).
The small-signal transistor parameters
(a).

Answer to Problem 6.14TYU
The values of small-signal parameters are,
Explanation of Solution
Given Information:
The circuit diagram is shown below.
Calculation:
The coupling and bypass capacitor act like open circuit for DC analysis. The AC voltage source ( vs ) is short circuited for DC analysis.
The modified figure is,
Applying Kirchhoff’s voltage law in base-emitter loop,
Determining the collector current,
Determining the Trans-conductance,
Determining the diffusion resistance
Determining the small-signal transistor output resistance
(b).
The small signal current gain
(b).

Answer to Problem 6.14TYU
The values of current and voltage gain,
Explanation of Solution
Given Information:
The circuit diagram is shown below.
Calculation:
The coupling and bypass capacitors are short circuited for small-signal analysis. The DC voltage source is short circuited for small−signal analysis.
The modified figure is,
Applying current division rule in output,
Considering input circuit,
Applying current division rule in input,
From equation (1),
Determining the small-signal voltage gain,
Applying voltage division rule in input,
Plugging the value of
(c).
The values of input and output resistance.
(c).

Answer to Problem 6.14TYU
The values of input and output resistance are,
Explanation of Solution
Given Information:
The circuit diagram is,
Calculation:
Considering the small signal equivalent circuit,
The value of input resistance is,
Determining the output resistance,
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Chapter 6 Solutions
MICROELECT. CIRCUIT ANALYSIS&DESIGN (LL)
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