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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Wien bridge oscillator canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9632291 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Wien bridge oscillator Context triple: [HP 200A audio oscillator, technology, Wien bridge oscillator]
-
A.
Kelvin Bridge
Kelvin Bridge is a historic stone bridge spanning the River Kelvin in Glasgow, Scotland, linking the city’s West End to the Kelvinbridge area.
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B.
Wheatstone bridge
The Wheatstone bridge is an electrical circuit used to precisely measure unknown resistances by balancing two legs of a bridge network.
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C.
HP 200A audio oscillator
The HP 200A audio oscillator was Hewlett-Packard’s first commercial product, a pioneering low-distortion audio signal generator that helped launch the company and became widely used in electronics testing, including by Walt Disney Studios.
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D.
Tomlinson Bridge
Tomlinson Bridge is a movable drawbridge in New Haven, Connecticut, carrying traffic over the Quinnipiac River and serving as a key local transportation link.
-
E.
Butterworth
Butterworth is a major town in Penang, Malaysia, serving as an important transport and industrial hub with key road, rail, and ferry links.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Wien bridge oscillator Target entity description: 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.
-
A.
Kelvin Bridge
Kelvin Bridge is a historic stone bridge spanning the River Kelvin in Glasgow, Scotland, linking the city’s West End to the Kelvinbridge area.
-
B.
Wheatstone bridge
The Wheatstone bridge is an electrical circuit used to precisely measure unknown resistances by balancing two legs of a bridge network.
-
C.
HP 200A audio oscillator
The HP 200A audio oscillator was Hewlett-Packard’s first commercial product, a pioneering low-distortion audio signal generator that helped launch the company and became widely used in electronics testing, including by Walt Disney Studios.
-
D.
Tomlinson Bridge
Tomlinson Bridge is a movable drawbridge in New Haven, Connecticut, carrying traffic over the Quinnipiac River and serving as a key local transportation link.
-
E.
Butterworth
Butterworth is a major town in Penang, Malaysia, serving as an important transport and industrial hub with key road, rail, and ferry links.
- F. None of above. chosen
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 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Wien bridge oscillator Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.