To minimize the interference form impulsive noise as well as the AM transmissions.
It is to reduce interference form impulsive noise and even a.m. transmissions. If the receiver uses a ratio detector instead of the normal frequency discriminator it will be self limiting, thus eliminating the need for a separate stage.
The discriminator, and the ratio detector, perform the same function in an f.m. receiver as the detector does in an a.m. receiver, i.e. it recovers the modulation.
After FM demodulation to the original AF signal it is necessary to amplify the weak AF signal to have enough power to drive speakers. That is the purpose.
The limiter clips the top and bottom of the FM signal to remove any AM signal or static that was picked up. This prevents the FM discriminator from seeing those unwanted signals and inadvertently converting them to audio, scrambling the intended audio signal. Simply put, the limiter blocks interference and static making FM reception very clean.
limiter mainly used to limit the amplitude of FM waveform.because of, in FM the frequency only varied but amplitude also varied due to noise . to cancel the amplitude variation limiter mainly used
Because in radio communication a signal is specified by its frequency, In AM the carrier frequency is fixed.. we cant limit or manipulate it as it will might switch us to another carrier in the atmosphere... manipulating however amplitude (as in FM) doesn't switch us to another channel... so remember in radio communication signal is specified by its frequency whether FM or AM..
Niigata Kenmin FM Broadcast was created on 2000-12-20.
97.6 Fm
TYPES OF RADIO RECEIVER • Basic crystal set. • A T.R.F. Receiver. • A Superhetrodyne Receiver. • the Reflex Receiver.
The radio station Maxima FM broadcasts from South America, in Argentina. Maxima FM is broadcast directly from the city of Venado Tuerto, in north-east Argentina.
FM broadcasting is a broadcast technology invented by Edwin Armstrong that used Frequency Modulation (FM) to provide high fidelity sound over broadcast radio
75khz