A particular circuit that rids FM of noise A. Detector B. Discriminator C. Phase Shifter D. Limiter

A particular circuit that rids FM of noise
A. Detector
B. Discriminator
C. Phase Shifter
D. Limiter
by

1 Answer

Answer :

D. Limiter
by

Related questions

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Last Answer : Amplitude limiter: The function of amplitude limiter is to remove all amplitude variation of FM carrier voltage that may occur due to atmospheric disturbances. Use of amplitude limiter makes the system less noisy  Circuit Diagram:

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Description : What condition must exist on both the limiter and quadrature grids for current to flow in a gated-beam detector?

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Last Answer : D. Angle

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Description : What are the problems associated with switch type phase detector?

Last Answer : 1.The output voltage Ve is proportional to the input signal amplitude.This is undesirable because it makes phase detector gain and loop gain dependent on the input signal amplitude. 2.The output is proportional to cosQ making it non linear.

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Description : What is a switch type phase detector?

Last Answer : An electronic switch is opened and closed by signal coming from VCO and the input signal is chopped at a repetition rate determined by the VCO frequency.This type of phase detector is called a ... detector since the phase information for only one half of the input signal is detected and averaged.

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Last Answer : 1.Analog phase detector . 2.Digital phase detector

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With the help of neat diagram, explain the working of phase discriminator.

Description : With the help of neat diagram, explain the working of phase discriminator.

Last Answer : Explanation:- This discriminator is also known as the center tuned discriminator or the Foster Seeley discriminator after its inventors. It is possible to obtain the same S- Shape response curve from a circuit in ... fin = fc, fin > fc + Δf and fin<fc- Δf should be given marks

Noise limiter is provided on AM receivers to

Last Answer : Noise limiter is provided on AM receivers to reduce interfering noise due to ignition system, reduce noise due to electrical storms, reduce interference due to electrical machinery.

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Description : What type of tank circuit is used in the Foster-Seeley discriminator?

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Last Answer : B. The combination of two signals to produce sum and difference frequencies.

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Last Answer : D. 8.8 dB

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Which circuit contributes most of the noise in a receiver? A. IF amplifier B. Demodulator C. AF amplifier D. Mixer

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Last Answer : D. Mixer

The noise figure of the first circuit in tandem connection is 10.5 dB while its power gain is 15, what is the over all noise figure if the second circuit has a noise figure of 11 dB? A. 11.59 dB B. 11.23 dB C. 10.79 dB D. 10.5 dB

Description : The noise figure of the first circuit in tandem connection is 10.5 dB while its power gain is 15, what is the over all noise figure if the second circuit has a noise figure of 11 dB? A. 11.59 dB B. 11.23 dB C. 10.79 dB D. 10.5 dB

Last Answer : C. 10.79 dB

_________ is measured on a circuit when it is correctly terminated but does not have any traffic. A. White noise B. Galactic noise C. Impulse noise D. Atmospheric noise

Description : _________ is measured on a circuit when it is correctly terminated but does not have any traffic. A. White noise B. Galactic noise C. Impulse noise D. Atmospheric noise

Last Answer : A. White noise

ECE Board Exam March 1996 What is the purpose of the receiver’s squelch circuit? A. To overcome fluctuations in the level the RF signal arriving at the receiver antenna B. To prevent fluctuations in the AGC bias level C. To reduce the receiver’s sensitivity to all incoming signals D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

Description : ECE Board Exam March 1996 What is the purpose of the receiver's squelch circuit? A. To overcome fluctuations in the level the RF signal arriving at the receiver antenna B. To prevent ... signals D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

Last Answer : D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

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Description : What is the name of system rids the body of liquid waste and regulates the water and chemical balance in the blood?

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What is the function of an fm detector?

Description : What is the function of an fm detector?

Last Answer : Converting frequency variations of received fm signals to amplitude variations

What is the simplest form of fm detector?

Description : What is the simplest form of fm detector?

Last Answer : Slope detector.

What are the different types of FM detector?

Description : What are the different types of FM detector?

Last Answer : The different types of FM Detectors are: 1. Simple Slope Detector 2. Balanced Slope Detector 3. Ratio Detector 4. Phase Discriminator 5. FM Detector using Phase Locked Loop (PLL) 

List the types of FM detector. Explain any one of them.

Description : List the types of FM detector. Explain any one of them.

Last Answer : Types of FM detector:- 1. Simple slope detector 2. Balanced slope detector 3. Phase discriminator(Foster seely discriminator) 4. Ratio detector 5. PLL detector Simple ... . If the IF amplitude is sufficiently limited prior to reaching the PLL and the loop is properly compensated 

Draw and label PLL based FM detector.

Description : Draw and label PLL based FM detector.

Last Answer : Draw and label PLL based FM detector.

What is the function of phase limiter ?

Description : What is the function of phase limiter ?

Last Answer : A special part of the FM radio receiver is the limiter. If any type of amplitude modulation is present within the specified amplitude of the FM signal, it can be removed with the help of limiter by FM detection method. As a result, the operation of the FM discriminator is well accomplished.

What is phase limiter ?

Description : What is phase limiter ?

Last Answer : The phase limiter is a special part of the FM radio receiver , which limits the amplitude of the variable FM input signal.

If a circuit breaker that utilizes built-in, current limiting fuses (CLF's) cannot be closed, the problem may be traced to __________. A. a blown CLF plunger holding the trip bar in the open position B. a missing CLF C. a misaligned limiter housing assembly D. all of the above

Description : If a circuit breaker that utilizes built-in, current limiting fuses (CLF's) cannot be closed, the problem may be traced to __________. A. a blown CLF plunger holding the trip bar in the open position B. a missing CLF C. a misaligned limiter housing assembly D. all of the above

Last Answer : Answer: D

Draw the circuit diagram of limiter and explain its working.

Description : Draw the circuit diagram of limiter and explain its working.

Last Answer : Circuit diagram of amplitude limiter:- Explanation:- 1. In frequency modulation, the signal amplitude is held constant while the carrier frequency is varied. 2. Any noise that contaminates ... V p-p instead of the alternately driven into saturation and cutoff, it limits the signal amplitude

______ polarization is employed in FM broadcasting A. Horizontal B. Vertical C. Circular D. Bidirectional

Description : ______ polarization is employed in FM broadcasting A. Horizontal B. Vertical C. Circular D. Bidirectional

Last Answer : A. Horizontal

Which does not use vertical polarization antenna? A. AM Broadcasting B. FM Broadcasting C. Mobile Communications D. Satellite Communications

Description : Which does not use vertical polarization antenna? A. AM Broadcasting B. FM Broadcasting C. Mobile Communications D. Satellite Communications

Last Answer : B. FM Broadcasting

What modulation is normally used with digital data? A. AM B. FM C. SSB D. QPSK

Description : What modulation is normally used with digital data? A. AM B. FM C. SSB D. QPSK

Last Answer : D. QPSK

What type of modulation is used on voice and video signals? A. AM B. FM C. SSB D. QPSK

Description : What type of modulation is used on voice and video signals? A. AM B. FM C. SSB D. QPSK

Last Answer : B. FM

What is the spectrum of stereophonic FM signal? A. 19 to 38 kHz B. 30 to 53 kHz C. 59.5 to 74.5 kHz D. 88 to 108 MHz

Description : What is the spectrum of stereophonic FM signal? A. 19 to 38 kHz B. 30 to 53 kHz C. 59.5 to 74.5 kHz D. 88 to 108 MHz

Last Answer : B. 30 to 53 kHz

What is the channel number of an FM station with a carrier frequency of 99.5 MHz? A. 256 B. 258 C. 257 D. 259

Description : What is the channel number of an FM station with a carrier frequency of 99.5 MHz? A. 256 B. 258 C. 257 D. 259

Last Answer : B. 258

What is the approximate bandwidth of an FM system with 10 kHz of modulating frequency and a 150 kHz of frequency deviation? A. 300 kHz B. 320 kHz C. 150 kHz D. 200 kHz

Description : What is the approximate bandwidth of an FM system with 10 kHz of modulating frequency and a 150 kHz of frequency deviation? A. 300 kHz B. 320 kHz C. 150 kHz D. 200 kHz

Last Answer : B. 320 kHz

Cellular radios use FM with a maximum deviation of A. ±30 khz B. ±75 khz C. ±25 khz D. ±12 khz

Description : Cellular radios use FM with a maximum deviation of A. ±30 khz B. ±75 khz C. ±25 khz D. ±12 khz

Last Answer : D. ±12 khz

An FM receiver whose intermediate frequency is 10.7 MHz, is experiencing image channel interference from a station transmitting on 121.1 MHz. If the local oscillator is tracking above, the receiver is tuned to A. 131.8 MHz B. 110.4 MHz C. 142.5 MHz D. 99.7 MHz

Description : An FM receiver whose intermediate frequency is 10.7 MHz, is experiencing image channel interference from a station transmitting on 121.1 MHz. If the local oscillator is tracking above, the receiver is tuned to A. 131.8 MHz B. 110.4 MHz C. 142.5 MHz D. 99.7 MHz

Last Answer : D. 99.7 MHz

Most AM broadcasts employ ___ polarization while most FM broadcasts employ ___ polarization of the radio wave. A. vertical, vertical B. vertical, horizontal C. horizontal, vertical D. horizontal, horizontal

Description : Most AM broadcasts employ ___ polarization while most FM broadcasts employ ___ polarization of the radio wave. A. vertical, vertical B. vertical, horizontal C. horizontal, vertical D. horizontal, horizontal

Last Answer : B. vertical, horizontal

What is the deviation ratio for an FM-phone signal having a maximum frequency swing of plus or minus 5 kHz and accepting a maximum modulation rate of 3kHz? A. 60 B. 0.16 C. 0.6 D. 1.66

Description : What is the deviation ratio for an FM-phone signal having a maximum frequency swing of plus or minus 5 kHz and accepting a maximum modulation rate of 3kHz? A. 60 B. 0.16 C. 0.6 D. 1.66

Last Answer : D. 1.66

How many FM stations would be accommodated I an ordinary TV channel? A. 33 B. 30 C. 40 D. 25

Description : How many FM stations would be accommodated I an ordinary TV channel? A. 33 B. 30 C. 40 D. 25

Last Answer : B. 30

With which emission type is the capture-effect most pronounced? A. CW B. FM C. SSB D. AM

Description : With which emission type is the capture-effect most pronounced? A. CW B. FM C. SSB D. AM

Last Answer : B. FM