Question

Which statement is true about frequency multipliers?

(a) they are essentially balanced modulators

(b) they are essentially class C amplifiers

(c) they are essentially class AB amplifiers

(d) they are essentially mixers

I have been asked this question in a job interview.

I'm obligated to ask this question of Instantaneous Frequency and Frequency Modulation in section Angle Modulation of Analog Communications

Answer 1

Right option is (b) they are essentially class C amplifiers

For explanation: Frequency multiplier multiplies the frequency of the input by an integer, such that the output is a multiple of the input. Frequency multipliers are generally class C amplifiers.