Wien bridge oscillator

E812208

The Wien bridge oscillator is an electronic sine-wave generator that uses a Wien bridge network in its feedback loop to produce low-distortion audio-frequency signals.

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Statements (50)

Predicate Object
instanceOf audio-frequency oscillator
electronic oscillator
sine-wave generator
advantage good frequency stability
low noise
simple frequency adjustment
amplitudeStabilizationMethod diodes
incandescent lamp
nonlinear resistance
thermistor
basedOn lead-lag RC network
bridgeHasArms parallel RC arm
series RC arm
two purely resistive arms
category RC oscillator
commonlyImplementedWith operational amplifier
transistor amplifier
vacuum tube amplifier
designedBy William R. Hewlett NERFINISHED
disadvantage limited to relatively low frequencies
requires precise component matching
feedbackNetworkType bridge network
firstCommercializedIn HP 200A audio oscillator NERFINISHED
frequencyControlledBy capacitor values
resistor values
hasComponent amplifier
capacitor
nonlinear amplitude stabilizer
resistor
hasFeedbackType negative feedback
positive feedback
hasFrequencyFormula f = 1 / (2πRC)
hasTopology bridge oscillator
knownFor low distortion output
stable frequency
notBasedOn inductors
operatesAt audio frequencies
requires Barkhausen criterion for oscillation NERFINISHED
requiresCondition loop gain equal to one at oscillation frequency
total phase shift of zero degrees around loop
typicalDistortionLevel low harmonic distortion GENERATED
typicalOutputWaveform sinusoidal GENERATED
usedFor audio testing
laboratory instrumentation
measurement equipment calibration
signal generation
usedIn audio equipment design
education and laboratory experiments
uses Wien bridge network
yearOfFirstImplementation 1939

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HP 200A audio oscillator technology Wien bridge oscillator