Widlar bandgap reference (attributed)
E1026751
The Widlar bandgap reference is an early, influential voltage reference circuit design that produces a temperature-stable output voltage by exploiting the bandgap energy of silicon, attributed to analog IC pioneer Bob Widlar.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Widlar bandgap reference (attributed) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13183668 — 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: Widlar bandgap reference (attributed) Context triple: [Bob Widlar, hasConceptNamedAfter, Widlar bandgap reference (attributed)]
-
A.
LM-series analog ICs
LM-series analog ICs are a widely used family of linear integrated circuits, including voltage regulators, operational amplifiers, and timers, originally introduced by National Semiconductor for general-purpose analog signal processing and power management.
-
B.
NE555 timer
The NE555 timer is a widely used integrated circuit that provides precise timing, pulse generation, and oscillator functions in countless electronic circuits.
-
C.
Lilienfeld field-effect transistor concept
The Lilienfeld field-effect transistor concept is an early theoretical design for a voltage-controlled semiconductor device that anticipated the modern field-effect transistor decades before it became practical.
-
D.
Esaki diode
The Esaki diode is a heavily doped semiconductor tunnel diode that exhibits negative differential resistance, enabling high-speed and microwave-frequency electronic applications.
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E.
µA741
µA741 is a classic general-purpose operational amplifier integrated circuit widely used in analog electronics for signal conditioning, filtering, and amplification.
- 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: Widlar bandgap reference (attributed) Target entity description: The Widlar bandgap reference is an early, influential voltage reference circuit design that produces a temperature-stable output voltage by exploiting the bandgap energy of silicon, attributed to analog IC pioneer Bob Widlar.
-
A.
LM-series analog ICs
LM-series analog ICs are a widely used family of linear integrated circuits, including voltage regulators, operational amplifiers, and timers, originally introduced by National Semiconductor for general-purpose analog signal processing and power management.
-
B.
NE555 timer
The NE555 timer is a widely used integrated circuit that provides precise timing, pulse generation, and oscillator functions in countless electronic circuits.
-
C.
Lilienfeld field-effect transistor concept
The Lilienfeld field-effect transistor concept is an early theoretical design for a voltage-controlled semiconductor device that anticipated the modern field-effect transistor decades before it became practical.
-
D.
Esaki diode
The Esaki diode is a heavily doped semiconductor tunnel diode that exhibits negative differential resistance, enabling high-speed and microwave-frequency electronic applications.
-
E.
µA741
µA741 is a classic general-purpose operational amplifier integrated circuit widely used in analog electronics for signal conditioning, filtering, and amplification.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
analog integrated circuit topology
ⓘ
bandgap voltage reference circuit ⓘ voltage reference circuit ⓘ |
| approximateBandgapEnergy | about 1.205 eV at 0 K (expressed as voltage) ⓘ |
| associatedWithOrganization | Fairchild Semiconductor ⓘ |
| associatedWithPerson | Bob Widlar ⓘ |
| attributedTo | Bob Widlar ⓘ |
| basedOn |
bandgap energy of silicon
ⓘ
difference of base-emitter voltages (ΔVbe) ⓘ proportional-to-absolute-temperature (PTAT) voltage generation ⓘ summation of PTAT and complementary-to-absolute-temperature (CTAT) voltages ⓘ |
| combines | PTAT voltage with CTAT Vbe ⓘ |
| compensatesFor | negative temperature coefficient of Vbe ⓘ |
| developedInContextOf | linear integrated circuits ⓘ |
| field |
analog circuit design
ⓘ
integrated circuit design ⓘ |
| generates | PTAT voltage from ΔVbe across resistor ⓘ |
| hasCharacteristic |
early bandgap reference implementation
ⓘ
influential in analog IC design ⓘ low temperature coefficient of output voltage ⓘ realizes bandgap voltage by extrapolation to 0 K ⓘ uses resistor ratioing ⓘ uses transistor area ratioing ⓘ |
| hasEffect | compensate temperature dependence of base-emitter voltage ⓘ |
| hasOutputQuantity | approximately temperature-independent voltage ⓘ |
| hasPurpose | provide temperature-stable reference voltage ⓘ |
| hasTemperatureBehavior | output voltage relatively constant over temperature ⓘ |
| historicalSignificance |
foundation for modern precision voltage references
ⓘ
one of the first practical bandgap reference circuits ⓘ |
| influenced | later bandgap reference topologies ⓘ |
| namedAfter | Bob Widlar ⓘ |
| operatesInMedium | monolithic bipolar integrated circuits ⓘ |
| typicalOutputVoltage | about 1.2 V ⓘ |
| usedFor |
analog-to-digital converters
ⓘ
on-chip voltage reference generation ⓘ precision analog circuits ⓘ voltage regulators ⓘ |
| usesComponent |
bipolar junction transistor
ⓘ
linked to:
The Transistor
operational amplifier or error amplifier ⓘ resistor ⓘ |
| usesSubstance | silicon ⓘ |
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: Widlar bandgap reference (attributed) Description of subject: The Widlar bandgap reference is an early, influential voltage reference circuit design that produces a temperature-stable output voltage by exploiting the bandgap energy of silicon, attributed to analog IC pioneer Bob Widlar.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.