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Electronics and Communications Engineering review notes and materials including rare materials. Online review, discussion, and answers to questions also available. | |
on Jan 22, 2012 in: Frenzel, Electronics Systems Technologies
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...
on Jan 22, 2012 in: Frenzel, Electronics Systems Technologies
CHAPTER 6Radio Transmitters 1. A radio transmitter generates the carrier signal, provides power amplification, and applies modulation. 2. The simplest transmitt...
on Jan 22, 2012 in: Frenzel, Electronics Systems Technologies
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. &...
on Jan 22, 2012 in: Frenzel, Electronics Systems Technologies
CHAPTER 8Multiplexing 1. Multiplexing is the process of transmitting multiple signals over a single communications channel. 2. The primary benefit of multiplex...
on Jan 22, 2012 in: Frenzel, Electronics Systems Technologies
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...;
on Jan 22, 2012 in: Frenzel, Electronics Systems Technologies
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...
on Jan 22, 2012 in: Frenzel, Electronics Systems Technologies
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...
