Basic IntroductionThe Frequency Modulation The frequency modulation is a sub-type of the process for analogue oscillation modulation
PM: instantaneous phase deviation of the carrier phase is proportional to the amplitude of m(t) volt radians inD p •Modulation Constant
A frequency discriminator is a device that converts a received FM signal into a voltage that is proportional to the instantaneous frequency of its input without
A frequency discriminator is a device that converts a received FM signal into a voltage that is an estimate of the instantaneous frequency of its input without
to derive an expression for the instantaneous voltage of an FM signal in order to understand the basic principles The definition of angular frequency
As stated earlier, the input signal (analog or digital) changes the characteristics of the carrier waveform Therefore, there are two basic modulation schemes
Understanding Frequency Modulation (FM), Frequency Shift Keying (FSK), The basic idea behind a FM spectrum is that it is a superimposition of impulses
A process that causes a shift in the range of frequencies of a signal Analog: AM (DSB, SSB, VSB), FM, Delta modulation Basic Type of Modulation
FM – frequency modulation, used since 1920s to transmit by Means of Frequency Modulation” Operator is a basic building block of FM synthesis
Frequency Modulation Frequency modulation and phase modulation are closely related A PLL consists of three basic components: ❑ Phase detector
frequency :FM for constant modulation or y sensitivit phase :PM for : signal modulated - angle Figure 5–9 FM with a sinusoidal baseband modulating signal