Physics Quiz: Unit III - Multistage Amplifiers and Differential Amplifier

What is the purpose of a cascode amplifier?

• To increase the input-output impedance of a basic amplifier

• To decrease the gain and bandwidth of a basic amplifier

• To improve the gain, bandwidth, and input-output impedance of a basic amplifier.

• To reduce the overall performance of a basic amplifier

How does a cascode amplifier differ from a single-stage amplifier?

• A cascode amplifier has the same gain and frequency response as a single-stage amplifier.

• A cascode amplifier is used for audio signals while a single-stage amplifier is used for digital signals.

• A cascode amplifier provides lower gain and worse frequency response compared to a single-stage amplifier.

• A cascode amplifier provides higher gain and better frequency response compared to a single-stage amplifier.

What are the advantages of using a cascode amplifier?

• High gain, high bandwidth, and low output impedance

• Low gain, low bandwidth, and high output impedance

• High gain, low bandwidth, and high output impedance

• Low gain, low bandwidth, and low output impedance

Explain the working principle of a differential amplifier.

• The working principle of a differential amplifier is to amplify the voltage sum of two input signals.

• The working principle of a differential amplifier is to suppress the voltage difference between two input signals.

• The working principle of a differential amplifier is to amplify the common-mode signals while suppressing any differential signals.

• The working principle of a differential amplifier is to amplify the voltage difference between two input signals while suppressing any common-mode signals.

What is the significance of the differential amplifier in electronic circuits?

• It amplifies the difference between two input signals while rejecting any common-mode signals.

• It reduces the difference between two input signals

• It amplifies all input signals equally

• It only amplifies common-mode signals

How does a differential amplifier reject common-mode signals?

• By amplifying all signals equally

• By ignoring all input signals

• By amplifying only the common-mode signals

• By amplifying the difference between the two input signals while suppressing any signals that are common to both inputs.

What are the applications of a differential amplifier?

• Video games, social media, and online shopping

• Cooking recipes, gardening tips, and fashion advice

• Instrumentation amplifiers, operational amplifiers, and communication systems

• Car maintenance, home improvement, and pet care

Compare the performance of a cascode amplifier and a differential amplifier.

• The performance of a cascode amplifier is always better than a differential amplifier

• The performance of a differential amplifier is always better than a cascode amplifier

• The performance of a cascode amplifier and a differential amplifier is exactly the same

• The performance of a cascode amplifier and a differential amplifier depends on the specific requirements of the application.