Differential Amplifier Quiz

What is a differential amplifier?

• A type of musical amplifier

• A type of electronic amplifier that amplifies the difference between two input signals

• An amplifier that only amplifies one input signal

• A type of cooking utensil

How does a differential amplifier amplify the difference between two input signals?

• By using a pair of transistors in a configuration that amplifies the voltage difference between the two inputs.

• By using a capacitor to amplify the difference between the two input signals.

• By using a pair of resistors to amplify the sum of the two input signals.

• By using a single transistor to amplify the average of the two input signals.

What is the formula to calculate the common mode rejection ratio (CMRR) of a differential amplifier?

• CMRR = 10log10(Ad/Acm)

• CMRR = 20log(Ad/Acm)

• CMRR = 20log10(Ad/Acm)

• CMRR = Ad/Acm

Why is a high CMRR desirable in a differential amplifier?

• To amplify common mode signals

• To increase noise and interference

• To decrease the overall signal strength

• To reject common mode signals and reduce noise or interference.

How do you calculate the differential gain of a differential amplifier?

• By taking the ratio of the change in output voltage to the change in input voltage for the differential input signal.

• By calculating the frequency response of the amplifier

• By measuring the weight of the amplifier

• By counting the number of transistors in the amplifier

What are some common applications of a differential amplifier?

• Audio amplifiers, instrumentation amplifiers, and operational amplifiers

• Feedback amplifiers, isolation amplifiers, and distribution amplifiers

• Power amplifiers, voltage amplifiers, and current amplifiers

• Digital amplifiers, analog amplifiers, and hybrid amplifiers

What are the key components required in the circuit design of a differential amplifier?

• Four transistors and a battery

• Two transistors, resistors, and a power supply

• Five resistors and a solar panel

• Three capacitors and a transformer