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WorksheetsFMSS Quiz #1
Total questions: 20
Worksheet time: 18mins
Negative feedback in op-amps is used to:
Increase open-loop gain
Reduce stability
Stabilize and control closed-loop gain
Eliminate bandwidth
Without negative feedback, op-amps are primarily useful as:
Linear amplifiers
Filters
Comparators
Oscillators
The resistance viewed from the output terminal of an op-amp is:
Output impedance
Frequency response
Input impedance
Slew rate
The maximum rate of change of output voltage with respect to time is:
The small DC voltage required between inputs to make output zero is called:
CMRR (Common-Mode Rejection Ratio) measures:
Bandwidth
Ability to reject noise common to both inputs
Maximum output swing across the output
Slew rate
A higher CMRR value indicates:
Poor noise rejection
Higher output impedance
Lower input impedance
Better noise rejection
The term "operational amplifier" was originally derived from its ability to perform:
Power amplification
Voltage regulation
Mathematical operations
Current multiplication
An ideal op-amp has:
Infinite input impedance
Zero input impedance
Infinite output impedance
Low voltage gain
The practical op-amp differs from the ideal op-amp in that:
It has noise and offset voltages
It has exactly infinite gain
It has infinite bandwidth
It has zero noise
Which of the following is not an ideal op-amp characteristic?
Infinite voltage gain
Zero output impedance
Infinite bandwidth
Finite input impedance
Practical op-amps typically have:
Very high input impedance
Very low voltage gain
Infinite output impedance
Zero input impedance
In differential mode, the op-amp amplifies:
The average of both input signals
The difference between input signals
The sum of input signals
Only the positive input
In a non-inverting amplifier, the closed-loop gain is determined by:
Input voltage only
External resistor values
Supply voltage
Open-loop gain
The frequency range over which gain remains within 3dB of its midrange value is:
Slew rate
Bandwidth
Unity-gain frequency
Gain margin
The main advantage of a differential amplifier is its ability to:
Provide infinite gain
Cancel common-mode signals
Work without power supply
Amplify only noise
If both inputs of a differential amplifier are equal, the output is:
Maximum positive
Maximum negative
Infinite
Zero
A differential amplifier can work in which input mode?
Differential mode
Common mode
All of these
As the closed-loop gain of an op-amp increases, the bandwidth:
Decreases
Increases
Remains constant
Becomes infinite
The frequency where the gain becomes unity is called:
