WorksheetsExpt 3 - Study of OPAMP amplifiers
Total questions: 10
Worksheet time: 5mins
When a differential amplifier is operated single-ended,
The output is grounded
One input is grounded and signal is applied to the other
Both inputs are connected together
The output is not inverted
The common-mode gain is ………..
Very high
Very low
Always unity
Unpredictable
The output of a particular Op-amp increases 8V in 12μs. The slew rate is
90 V/μs
0.67 V/μs
1.5 V/μs
None of the above
The input offset current equals the
Difference between two base currents
Average of two base current
Collector current divided by current gain
None of these
If ADM = 3500 and ACM = 0.35, the CMRR is
1225
10000
80 dB
Option 2 & 3
The Op-amp can amplify
A.C. signals only
D.C. signals only
Both A.C. and D.C. signals
Neither D.C. nor A.C. signals
A certain non-inverting amplifier has Ri of 1 kΩ and Rf of 100 kΩ. The closed-loop voltage gain is ………
100,000
1000
101
100
Op-Amp has _______ gain
High
Low
Zero
Medium
Which of the following electrical characteristics is not exhibited by an ideal op-amp
Infinite voltage gain
Infinite bandwidth
Infinite output resistance
Infinite slew rate
In a typical op-amp, which stage is supposed to be a dual-input unbalanced output or single-ended output differential amplifier
Input stage
Intermediate stage
Level shifting stage
Output stage
