
(a)
Value of current IDQ1 and ICQ2 .
(a)

Answer to Problem 12.40P
Value of current is,
Explanation of Solution
Given:
The given values are:
The given circuit is shown below.
Calculation:
Modified circuit diagram is shown below.
Neglecting base current.
Equation of current ID1 is,
Equation of voltage VD is,
Equation of current IC2 is,
Value of voltage VGS is,
Value of current IDQ1 is,
Value of current ICQ2 is,
(b)
Value of small signal voltage gain.
(b)

Answer to Problem 12.40P
Value of small signal voltage gain is 0.88.
Explanation of Solution
Given:
Given values are:
Calculation:
Small signal circuit is shown below.
Value of trans-conductance of transistor 1 is,
Value of trans-conductance of transistor 2,
Value of small signal resistance is,
Applying KCL at node (2),
Equation of output voltage is,
Applying KCL at node (1),
Value of small signal voltage gain is,
(c)
Value of small signal output resistance.
(c)

Answer to Problem 12.40P
Value of small signal output resistance is
Explanation of Solution
Given:
Given values are,
Calculation:
Small signal circuit for output resistance calculation ( Vi =0) is,
Applying KCL at node 3 for output resistance,
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Chapter 12 Solutions
Microelectronics: Circuit Analysis and Design
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