Linear Diode Detector or Envelope Detector: Diode detection is called the envelope detection as it recovers the audio frequency signal envelope from the composite signal. Diode detector is also called the linear detector as its…
Square Law Detector Circuit and Working Principle: The square law detector circuit is used for demodulating modulated signal of small amplitude (i.e., below 1 V) so that the operating region may be restricted to the…
Amplitude Detection Process: Amplitude Detection - The process of demodulation demands that the modulated wave has some definite average value and the carrier wave is separated out. Hence in demodulation of an AM wave two…
What is Demodulation or Detection? - Need of demodulation: Demodulation or detection is a process of recovering the original modulating signal (intelligence) from the modulated carrier wave i.e., the demodulation is a process reverse of…
Difference Between Frequency Modulation and Phase Modulation: The Difference Between Frequency Modulation and Phase Modulation are discussed below FM and PM are quite similar except by the manner in which the modulation index is defined.…
Difference Between Frequency Modulation and Amplitude Modulation: The Difference Between Frequency Modulation and Amplitude Modulation are discussed below The frequency modulation (FM) has the following advantages over the amplitude modulation (AM) : 1. FM receivers…
Single Sideband Modulation (SSB): Single Sideband Modulation (SSB) can he obtained by passing the output of a carrier suppressor (product modulator) through filter circuits that are selective to transmit one sideband while suppressing the other.…
Generation of DSBSC Signal using Balanced and Ring Modulator: DSBSC signal can be obtained by simply multiplying the modulating signal with the carrier signal. By simple multiplication of Vc sin ωct and Vm sin ωmt, we have the…
Square Law Diode Modulator - Circuit Diagram and its V-I Characteristics: Basic circuit of a square law diode modulator is shown in Fig. 22.30. It utilizes the nonlinear region of voltage-current dynamic characteristic of a…
Emitter Modulation - Circuit Diagram and its Operation: The circuit for emitter modulation is shown in Fig. 22.29. It is essentially a CE amplifier. The carrier signal from a crystal oscillator is coupled to the…
