Broadband Transistor Amplifier Design MCQ’s

Electronics & Communication Engineering RF & Microwave Circuit Design

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “Broadband Transistor Amplifier Design”.

1. To flatten the gain response of a transistor:
a) biasing current has to be increased
b) input signal level has to increased
c) increase the operational bandwidth
d) give negative feedback to the amplifier

2. In conventional amplifiers, a flat gain response is achieved at the cost of reduced gain. But this drawback can be overcome by using:
a) balanced amplifiers
b) distributed amplifiers
c) differential amplifiers
d) none of the mentioned

3. High gain is not achievable at microwave frequencies using BJT amplifiers because:
a) device construction
b) complex architecture
c) ports are not matched at high frequencies
d) none of the mentioned

4. Bandwidth of balanced amplifier can be an octave or more, but is limited by the bandwidth of the coupler.
a) true
b) false

5. Distributed amplifiers offer very high _________
a) gain
b) bandwidth
c) attenuation
d) none of the mentioned

6. ____________ uses balanced input and output, meaning that there are 2 signal lines, with opposite polarity at each port.
a) differential amplifier
b) distributed amplifier
c) balanced amplifier
d) none of the mentioned

7. Coupler that is mostly used in balanced amplifiers to achieve the required performance is:
a) branch line coupler
b) wilkinson coupler
c) lange coupler
d) waveguide coupler

8. In distributed amplifiers, all the FET stages in the amplifier are connected in series to one another.
a) true
b) false

9. A major advantage of differential amplifiers is:
a) high gain
b) low input impedance
c) higher output voltage swing
d) none of the mentioned

10. Along with a differential amplifier, 1800 hybrid is used both at the input and output.
a) true
b) false

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