
a.
Worst case output voltage for given circuit.
a.

Answer to Problem 14.55P
The worst case output voltage is
Explanation of Solution
Given:
The given circuit is shown below.
Input offset voltage
Average input bias current
Input offset current
Calculation:
On applying
For given circuit
For an op-amp
Then,
Now, KCL at input nodes:
For op-amp circuit
Now, output voltage due to input bias current and input offset current is,
Due to offset voltage,
From equation (1)
So, the worst case output voltage for the circuit will be,
b.
Worst case output voltage for given circuit.
b.

Answer to Problem 14.55P
The worst case output voltage is
Explanation of Solution
Given:
The given circuit is shown below.
Input offset voltage
Average input bias current
Input offset current
Calculation:
Consider the circuit shwon below.
Apply KCL at non-inverting terminal
For op-amp
So,
Now, KCL at inverting terminal,
Putting
As,
And
Adding (4) and (5)
From (4)
For
For
For the circuit
If offset voltage is negative, then from (1)
Let
Putting
So, the worst case output voltage for circuit is
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Chapter 14 Solutions
Microelectronics: Circuit Analysis and Design
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