Operational Amplifier MCQs : This section focuses on the "Operational Amplifier" in Linear Integrated Circuits. These Multiple Choice Questions (MCQs) should be practiced to improve the Linear Integrated Circuits skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Operational Amplifier, also called as an ?
Explanation: Operational Amplifier, also called as an Op-Amp, is an integrated circuit, which can be used to perform various linear, non-linear, and mathematical operations
An op-amp is a direct coupled high gain amplifier.
C. Can be true or false
D. Can not say
Explanation: True, An op-amp is a direct coupled high gain amplifier.
op-amp can operate on?
A. AC signals
B. DC signals
C. AC and DC signals
D. VC signals
Explanation: You can operate op-amp both with AC and DC signals
An op-amp consists of ________ input terminals.
Explanation: An op-amp consists of two input terminals. One of those terminals is called as the inverting terminal and the other one is called as the non-inverting terminal.
The voltage present at the output of an op-amp when its differential input voltage is zero is called as?
A. Open loop voltage gain
B. Common Mode Rejection Ratio
C. Output offset voltage
D. Closed offset voltage
Explanation: The voltage present at the output of an op-amp when its differential input voltage is zero is called as output offset voltage.
CMRR can be represented as?
A. the addition of the closed loop differential gain and the common mode gain
B. the multiplication of the closed loop differential gain and the common mode gain
C. the subtraction of the closed loop differential gain and the common mode gain
D. the ratio of the closed loop differential gain and the common mode gain
Explanation: CMRR can be represented as the ratio of the closed loop differential gain and the common mode gain.
Op-amps are of ______ types.
Explanation: Op-amps are of two types: Ideal Op-Amp and Practical Op-Amp.
Which is not the internal circuit of operational amplifier?
A. Differential amplifier
C. Level translator
D. Output driver
Explanation: Clamper is an external circuit connected at the output of Operational amplifier, which clamp the output to desire DC level.
To increase the value of CMRR, which circuit is used to replace the emitter resistance Re in differential amplifier?
A. Resistor in parallel with Re
B. sistor in series with Re
C. Diode in parallel with Re
D. Constant current bias
Explanation: Constant current bias offers extremely large resistor under AC condition and thus provide high CMRR value.
Change in value of common mode input signal in differential pair amplifier make
A. Slight change in collector voltage
B. Collector voltage decreases to zero
C. Change in voltage across collector
D. None of the above
Explanation: In differential amplifier due to symmetry, both transistors are biased and matched. Therefore, Voltage at each collector will be same