Question

Which of the following is the advantage of base modulation over collector modulation of a class C amplifier?

(a) lower modulation power is required

(b) higher power output per transistor

(c) better efficiency

(d) better linearity of modulation

I have been asked this question in an internship interview.

My doubt is from Disadvantages of Filter Method topic in division SSB Modulation of Analog Communications

Answer 1

The correct answer is (a) lower modulation power is required

To explain: Base modulation is preferred over collector modulation of a class C transistor because  low modulating power is required and collector saturation prevents complete modulation of a signal. Generally, Collector modulation has more advantages over Base modulation like high linearity, better collector efficiency and such like.