ECE Board Exams



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Electronics and Communications Engineering review notes and materials including rare materials. Online review, discussion, and answers to questions also available.



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CHAPTER 5Frequency Modulation Circuits  1.        The component most widely used for FM or PM is the varactor diode or voltage variable capacitor (VVC). 2.        A VVC is a...

CHAPTER 6Radio Transmitters  1.        A radio transmitter generates the carrier signal, provides power amplification, and applies modulation. 2.        The simplest transmitt...

CHAPTER 2Amplitude Modulation and Single-Sideband Modulation1.        Modulation is the process of having the information to be communicated modifies a higher frequency signal called a carrier. 2.   &...

CHAPTER 8Multiplexing  1.        Multiplexing is the process of transmitting multiple signals over a single communications channel. 2.        The primary benefit of multiplex...

CHAPTER 7Communications Receivers  1.        The simplest form of communications receiver is the tuned radio-frequency (TRF) receiver which provides RF and AF gain, selectivity, and a demodulator. 2. &nbs...;

CHAPTER 4Frequency Modulation  1.        In FM, the information signal varies the frequency of the carrier. 2.        The amount of frequency change from the carrier center f...

CHAPTER 3Amplitude Modulation Circuits  1.        Amplitude modulation can be accomplished by multiplying the carrier sine wave by a gain or attenuation factor that varies in accordance with the intelligence si...







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