Transistor Multipliers MCQ’s

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

1. A major characteristic property required by frequency multipliers for frequency multiplication to happen is:
a) High gain
b) High conversion efficiency
c) Non linearity
d) None of the mentioned

2. If the input power for a frequency doubler is 10.7 mW and the output measured after the frequency doubling process is 21 mW, then the conversion gain for the frequency doubler is:
a) 4.5 dB
b) 8.4 dB
c) 9.8 dB
d) 2.9 dB

3. Transistor multipliers are more efficient compared to diode multipliers from all operational aspects.
a) True
b) False

4. An ideal _______ produces an output consisting of the sum and difference frequencies of the two input signals.
a) Mixer
b) Amplifier
c) Product modulator
d) Phase modulator

5. A mixer can be used for both up conversion and down conversion at the transmitter and receiver respectively.
a) True
b) False

6. The IS-54 digital cellular telephone system uses a receive frequency band of 869-894 MHz, with a first IF frequency range of 87 MHz, one possible range of local oscillator frequency is:
a) 956 to 981 MHz
b) 750 to 784 MHz
c) 869 to 894 MHz
d) None of the mentioned

7. A mixer consists of a non-linear device that produces various harmonics of the input frequency.
a) True
b) False

8. A mixer having high conversion loss is said to have very high:
a) Gain
b) Loss
c) Bandwidth
d) None of the mentioned

9. The curve of FET transconductance v/s gate-to-source voltage is a straight line through origin.
a) True
b) False

10. RF input matching and RF-LO isolation can be improved through the use of:
a) Balanced mixer
b) Single-ender diode mixer
c) Single ended FET mixer
d) Image reject mixer

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