Fleming valve
E39372
The Fleming valve is an early thermionic vacuum tube diode invented by John Ambrose Fleming that enabled the rectification and detection of radio signals, laying groundwork for modern electronics.
Aliases (2)
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
electronic component
→
thermionic diode → vacuum tube → |
| alsoKnownAs |
Fleming diode
→
Fleming oscillation valve → |
| applicationDomain |
power rectification
→
wireless communication → |
| basedOn |
Edison effect
→
|
| countryOfOrigin |
United Kingdom
→
|
| electricalPolarity |
conducts in one direction
→
|
| electrodeType |
heated cathode
→
plate (anode) → |
| enables |
conversion of alternating current to direct current
→
wireless telegraphy reception → |
| era |
early 20th century
→
|
| field |
electronics
→
radio engineering → |
| hasPart |
anode
→
cathode → evacuated glass envelope → filament → |
| historicalSignificance |
first practical vacuum tube diode
→
first widely used thermionic valve → |
| inception |
1904
→
|
| influenced |
development of modern electronics
→
development of vacuum tube technology → |
| inventor |
John Ambrose Fleming
→
|
| material |
glass
→
|
| medium |
high vacuum
→
|
| namedAfter |
John Ambrose Fleming
→
|
| nonConductingDirection |
reverse bias
→
|
| numberOfActiveElectrodes |
2
→
|
| operatingPrinciple |
thermionic emission
→
unidirectional electron flow from cathode to anode → |
| patentHolder |
John Ambrose Fleming
→
|
| patentJurisdiction |
United Kingdom
→
United States → |
| patentStatus |
expired
→
|
| powerType |
thermionic
→
|
| replacedBy |
audion triode
→
semiconductor diode → |
| usedFor |
demodulation
→
detection of radio signals → rectification of radio signals → |
| usedIn |
early radio receivers
→
early rectifier circuits → wireless telegraph stations → |
Referenced by (3)
| Subject (surface form when different) | Predicate |
|---|---|
|
Fleming valve
("Fleming oscillation valve")
→
Fleming valve ("Fleming diode") → |
alsoKnownAs |
|
Audion
→
|
improvedUpon |