Related InterviewSolutions

• Colpitts oscillator is used in frequency modulation.(a) True(b) FalseThe question was posed to me in a job interview.The doubt is from Superhetrodyne Receiver topic in chapter Receivers & Transducers of Analog Communications
• The frequency deviation is proportional to both amplitude and frequency in the phase modulated signal.(a) True(b) FalseThis question was posed to me in homework.My question is taken from Superhetrodyne Receiver in section Receivers & Transducers of Analog Communications
• The difference between phase and frequency modulation ________(a) lies in the poorer radio response of phase modulation index(b) lies in the different definition of modulation index(c) is too great to make the two systems compatible(d) is purely theoreticalThis question was addressed to me in class test.My question is taken from Superhetrodyne Receiver in division Receivers & Transducers of Analog Communications
• Which of the following statement is true about frequency modulation?(a) noise gets decrease if we decrease deviation(b) noise gets decrease if we increase deviation(c) noise gets decrease by maintaining deviation constant(d) noise relates parabolically to deviationThe question was posed to me in homework.The question is from Superhetrodyne Receiver in division Receivers & Transducers of Analog Communications
• De-emphasis circuit is used in circuit before detection.(a) True(b) FalseI have been asked this question in an interview for internship.This interesting question is from Superhetrodyne Receiver in section Receivers & Transducers of Analog Communications
• In a frequency modulated signal, the power _________ as the modulation index increases.(a) remains constant(b) increase(c) decrease(d) becomes 0The question was posed to me in a national level competition.The doubt is from Superhetrodyne Receiver topic in division Receivers & Transducers of Analog Communications
• Pre-emphasis circuit is used ________(a) before detection(b) after detection(c) before encoding(d) after encodingThis question was addressed to me in final exam.My question is taken from Superhetrodyne Receiver topic in section Receivers & Transducers of Analog Communications
• Frequency fogging is used to reduce noise in a carrier system.(a) True(b) FalseThis question was posed to me by my school principal while I was bunking the class.The doubt is from Superhetrodyne Receiver topic in portion Receivers & Transducers of Analog Communications
• For a periodic function, the spectral density and auto-correlation functions are ________(a) Laplace transform pair(b) Fourier transform pair(c) Gauss transform pair(d) Z-transform pairI have been asked this question in my homework.This intriguing question originated from RF Mixing topic in section Receivers & Transducers of Analog Communications
• Spectral density express ________(a) Average voltage(b) Average power in a waveform as a function of frequency(c) Average noise voltage(d) Average channel capacityI have been asked this question in an internship interview.Question is taken from RF Mixing topic in chapter Receivers & Transducers of Analog Communications