µA709
E79823
analog integrated circuit
monolithic integrated circuit
operational amplifier integrated circuit
voltage-feedback operational amplifier
The µA709 is an early monolithic operational amplifier integrated circuit that became widely used in analog electronics and helped establish the commercial op-amp market.
All labels observed (2)
| Label | Occurrences |
|---|---|
| µA709 operational amplifier | 2 |
| µA709 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T638453 — 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: µA709 Context triple: [Fairchild Semiconductor, notableProduct, µA709]
-
A.
Mogami
Mogami was a lead ship of a class of Japanese World War II heavy cruisers known for their high speed, heavy armament, and participation in major Pacific naval battles.
-
B.
Fairchild Semiconductor
Fairchild Semiconductor was a pioneering American semiconductor company that played a central role in the development of Silicon Valley and the modern integrated circuit industry.
-
C.
RCA 1802 microprocessor
The RCA 1802 microprocessor is an early CMOS-based 8-bit CPU notable for its low power consumption, radiation hardness, and use in spacecraft and embedded systems in the 1970s and 1980s.
-
D.
Audion
Audion is an early triode vacuum tube invented by Lee de Forest that enabled the amplification of electrical signals and was crucial to the development of radio and electronics.
-
E.
Philortyx
Philortyx is a genus of New World quails known for their ground-dwelling habits and occurrence in scrub and grassland habitats of the Americas.
- 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: µA709 Target entity description: The µA709 is an early monolithic operational amplifier integrated circuit that became widely used in analog electronics and helped establish the commercial op-amp market.
-
A.
Mogami
Mogami was a lead ship of a class of Japanese World War II heavy cruisers known for their high speed, heavy armament, and participation in major Pacific naval battles.
-
B.
Fairchild Semiconductor
Fairchild Semiconductor was a pioneering American semiconductor company that played a central role in the development of Silicon Valley and the modern integrated circuit industry.
-
C.
RCA 1802 microprocessor
The RCA 1802 microprocessor is an early CMOS-based 8-bit CPU notable for its low power consumption, radiation hardness, and use in spacecraft and embedded systems in the 1970s and 1980s.
-
D.
Audion
Audion is an early triode vacuum tube invented by Lee de Forest that enabled the amplification of electrical signals and was crucial to the development of radio and electronics.
-
E.
Philortyx
Philortyx is a genus of New World quails known for their ground-dwelling habits and occurrence in scrub and grassland habitats of the Americas.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
analog integrated circuit
ⓘ
monolithic integrated circuit ⓘ operational amplifier integrated circuit ⓘ voltage-feedback operational amplifier ⓘ |
| alsoManufacturedBy | other second-source semiconductor vendors ⓘ |
| applicationDomain | analog electronics ⓘ |
| category | linear IC ⓘ |
| configuration | internally compensated with external components ⓘ |
| designer | Bob Widlar ⓘ |
| hasArchitecture |
bipolar differential input stage
ⓘ
output stage ⓘ voltage gain stage ⓘ |
| hasPin |
compensation pins
ⓘ
inverting input ⓘ negative supply ⓘ non-inverting input ⓘ output ⓘ positive supply ⓘ |
| hasSuccessor | µA741 ⓘ |
| historicalSignificance | early standard op-amp building block in analog design ⓘ |
| influenced | later general-purpose op-amp designs ⓘ |
| introducedBy | Fairchild Semiconductor ⓘ |
| introducedInDecade | 1960s ⓘ |
| manufacturer | Fairchild Semiconductor ⓘ |
| marketImpact | popularized integrated operational amplifiers ⓘ |
| marketPosition | general-purpose op-amp of its era ⓘ |
| notableFor |
being one of the first widely used monolithic op-amps
ⓘ
helping establish the commercial operational amplifier market ⓘ |
| packageType | 8-pin DIP ⓘ |
| requires |
dual power supply
ⓘ
external frequency compensation components ⓘ |
| stability | requires careful external compensation for stability ⓘ |
| supplyVoltageType | dual-rail ⓘ |
| supplyVoltageTypical | ±15 V ⓘ |
| technology | bipolar junction transistor ⓘ |
| usedFor |
active filters
ⓘ
closed-loop amplification ⓘ comparators (with limitations) ⓘ |
| usedIn |
analog signal conditioning circuits
ⓘ
audio and low-frequency amplifiers ⓘ control systems ⓘ instrumentation circuits ⓘ |
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: µA709 Description of subject: The µA709 is an early monolithic operational amplifier integrated circuit that became widely used in analog electronics and helped establish the commercial op-amp market.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
µA709 operational amplifier
this entity surface form:
µA709 operational amplifier