0195136047.pdf

INDEX 869

Variable-reluctance position sensor,
479
Variac, 492
VARs (unit), 207
VCO.SeeVoltage-controlled
oscillator
Very large-scale integration (VLSI),
270
Vestigial-sideband (VSB) AM,
690–91, 692, 698, 699
VHF band, 669
Video signal, 702
Videodisks, 313
Virtual ground, 245
Virtual short circuit, 231
VLSI.SeeVery large-scale
integration
Voice-band modems, 324–25
Volt-ampere equations, 528
Volt-amperes (unit), 455
Volta, Alessandro, 666
Voltage, 11
Voltage amplifier, 14, 799
Voltage drop, 12
Voltage follower, 402
Voltage regulation:
dc motor, 597
transformers, 486
Voltage rise, 12
Voltage sources, 11, 13
Voltage-controlled oscillator
(VCO), 694, 726
Voltage-current product, 11
Voltage-load characteristics, 540
Voltmeter, 47–48, 269

Vom, 48

VSB AM.SeeVestigial-sideband

AM

W

WAN (wide-area network), 320

Ward-Leonard system, 799–801

Wattmeter, 208

Watts (unit), 455

Wave windings, 518

Waveforms, 14–15

Waveguides, 671, 674

Weber (unit), 29

Weber-turns (unit), 29

WECSs.SeeWind-energy-

conversion systems

Weighted differencing amplifier,

250

Weighted-resistor D/A converter,

307

Wheatstone bridge, 49–50

Wide-area network.SeeWA N

Wide-band FM, 693, 694

Wide-band modems, 325

Winchester disks, 313

Wind-energy-conversion systems

(WECSs), 610–12

Windage losses, electromechanical

device, 540

Windings:

compensating winding, 596

emf produced by, 514–22

transformers, 490

wave windings, 518

Wire antennas, 680

Wire-line channels, 667

Wire-wound resistors, 17

Wireless communication systems,

668

Wireless electromagnetic channels,

668

World Wide Web, 320

Wound rotor, 558

Wye, 199, 202

Wye-connected load, balanced,

203–4

Wye-delta transformation, 83–84

X

X.25, 321

XOR gate.SeeEXCLUSIVE OR

gate

Y

yparameters, 163

Y-delta transformation.See

Wye-delta transformation

YAGI-UDA array, 680, 682

Z

zparameters, 163–64z-transform,

814 Zener diodes, 353–55