What parts of the varactor act as the plates of a capacitor?How does capacitance vary with applied voltage?Do varactors operate with forward or reverse bias?What is the main reason why LC oscillators are not used in transmitters today?Can the most widely used type of carrier oscillator be frequency-modulated by a varactor?What is the main advantage of using a phase modulator rather than a direct frequency modulator?What is the term for frequency modulation produced by PM?What is the most basic FM detector circuit?What circuit compensates for the greater frequency deviation at the higher modulating signalfrequencies?What two IC demodulators use the concept of averaging pulses in a low-pass filter to recover theoriginal modulating signal?Which is probably the best FM demodulator of all those discussed in this module?What is a capture range? What is a lock range?What frequency does the VCO assume when the input is outside the capture range?What type of circuit does a PLL look like over its lock range?Name at least six types of FM demodulators.1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.

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1. What parts of the varactor act as the plates of a capacitor?

Introductory Circuit Analysis (13th Edition)

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Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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Capacitor

The capacitor is an element used to store electrical energy in the electrical field. A capacitor is a form of passive energy.

Question

What parts of the varactor act as the plates of a capacitor?
How does capacitance vary with applied voltage?
Do varactors operate with forward or reverse bias?
What is the main reason why LC oscillators are not used in transmitters today?
Can the most widely used type of carrier oscillator be frequency-modulated by a varactor?
What is the main advantage of using a phase modulator rather than a direct frequency modulator?
What is the term for frequency modulation produced by PM?
What is the most basic FM detector circuit?
What circuit compensates for the greater frequency deviation at the higher modulating signal
frequencies?
What two IC demodulators use the concept of averaging pulses in a low-pass filter to recover the
original modulating signal?
Which is probably the best FM demodulator of all those discussed in this module?
What is a capture range? What is a lock range?
What frequency does the VCO assume when the input is outside the capture range?
What type of circuit does a PLL look like over its lock range?
Name at least six types of FM demodulators.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.

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