Concept explainers
A.
Worst case output voltages
A.

Answer to Problem D14.47P
Worst case output voltages are
Explanation of Solution
Given:
The given circuit is:
As
For first op-amp
Also
Now, KCL at input node
For second op-amp
Also
Now, KCL at input node
B.
To design:
Input bias current compensation circuit.
B.

Explanation of Solution
Given:
A simple compensation circuit can minimize the effect of bias currents in op-amp.
Consider the sketch ofinput bias current compensation circuit as,
Now, determine
For first op-amp:
KCL at non-inverting node,
As,
Therefore,
KCL at inverting node,
Putting
Now,
If
For second op-amp:
KCL at non-inverting node,
As,
Therefore,
KCL at inverting node,
Putting
Now,
If
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Chapter 14 Solutions
MICROELECT. CIRCUIT ANALYSIS&DESIGN (LL)
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