WActive filter
WAnalog delay line
WAnalog front-end
WAsymptotic gain model
WAudio crossover
WAutomatic gain control
WBiryukov equation
WBridged T delay equaliser
WBrokaw bandgap reference
WBucket-brigade device
WCommensurate line circuit
WCurrent divider
WCurrent source
WDamping factor
WDecade box
WDriven right leg circuit
WDriver circuit
WElectrical ballast
WElectronic mixer
WFlyback diode
WFrequency dependent negative resistor
WGrid-leak detector
WGyrator
WHybrid LC Filter
WImpulse response
WL pad
WLambda diode
WLattice phase equaliser
WLC circuit
WLED circuit
WLinear circuit
WLow-noise block downconverter
WMechanical filter
WMultivibrator
WNegative feedback
WNorator
WNullator
WNullor
WPassive integrator circuit
WPearson–Anson effect
WPhase detector
WPhase splitter
WΠ pad
WPlate detector (radio)
WPrototype filter
WRandles circuit
WRC time constant
WRLC circuit
WStep response
WT pad
WTelegraph sounder
WTransimpedance amplifier
WVoltage divider
WVoltage regulator
WVoltage source
WWidlar current source
WWien bridge oscillator
WZobel network