Demodulators for FM, Electrical Engineering

Assignment Help:

Demodulators for FM

Figure  shows a block diagram of a general FM demodulator, which is implemented by generating an AM signal whose amplitude is proportional to the instantaneous frequency of the FM signal, and then using an AM demodulator to recover the message signal. Transforming the FM signal into an AM signal can be achieved by passing the FM signal through an LTI system whose frequency response is nearly a straight line in the frequency band of the FM signal.

FM demodulators mainly fall into two categories: frequency discriminators and locked-loop demodulators. While both give the same performance for relatively high signal levels, locked- loop demodulators provide better performance than the discriminator when signal levels are low and noise is a problem. The discriminator produces an output voltage proportional to the frequency variations that occur in the FMsignal at its input. Locked-loop demodulators are more cost-efficient when implemented in IC form.

1654_Demodulators for FM.png


Related Discussions:- Demodulators for FM

Explain ramp type dvm, SOL. Ramp Type VM: The operating principle of the r...

SOL. Ramp Type VM: The operating principle of the ramp type DVM is based on the measurement of the time it takes for a linear ramp voltage to rise from 0 V to the level of the inp

Benefits of digital systems, Q. Show Benefits of digital systems? Ever ...

Q. Show Benefits of digital systems? Ever since most digital systems have only two possible states, there is high degree of accuracy in the transmission of data. With an analog

Physics, what do we mean when we say that an equation is dimensionally corr...

what do we mean when we say that an equation is dimensionally correct?

Switching characteristics during turn on , Switching characteristics during...

Switching characteristics during turn on A positive  gate  pulse  between  gate and  cathodeis sufficient to turn  on a thyrisotr. In  this period  thyristor  changes its stat

MIMO, MIMO downlink mode uses

MIMO downlink mode uses

What is output impedance, Q. What is Output Impedance? Output Impedance...

Q. What is Output Impedance? Output Impedance : The output impedance of an amplifier is a measure of the impedance or resistance. It has nothing to do with the actual loading t

Transformers, A 440v 4-pole dc generator takes an armature current of 50A w...

A 440v 4-pole dc generator takes an armature current of 50A when rotating at 626 rpm. the armature circuit resistance is 0.25 ohms. determine the generated emf?

What are the functional types used in control words of 8251a, What are the ...

What are the functional types used in control words of 8251a? The control words of 8251A are divided into two functional types. 1. Mode Instruction control word 2. Comman

Various characterstics of a dc shunt generator. , Q.   Draw the various cha...

Q.   Draw the various characterstics of a DC shunt generator and explain critical resistance.   Sol.  Following are three most important characterstics or curves of a d.

Explain global positioning systems, Q. Explain Global Positioning Systems? ...

Q. Explain Global Positioning Systems? Modern communication systems abound in practice: cellular phones, computer networks, television satellites, and optical links for telepho

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd