superheterodyne receiver
E169
The superheterodyne receiver is a radio receiver architecture that improves selectivity and sensitivity by converting incoming radio signals to a fixed intermediate frequency before final detection.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
heterodyne receiver
→
radio receiver architecture → |
| canHave |
double conversion architecture
→
single conversion architecture → triple conversion architecture → |
| convertsFrom |
radio frequency
→
|
| convertsTo |
fixed intermediate frequency
→
intermediate frequency → |
| enables |
high gain at intermediate frequency
→
narrow bandwidth filtering → use of fixed-tuned IF filters → |
| hasAbbreviation |
superhet
→
|
| hasAdvantage |
better selectivity than tuned radio frequency receivers
→
better sensitivity than tuned radio frequency receivers → stable performance over wide tuning range → |
| hasDisadvantage |
image frequency interference
→
spurious responses → |
| improves |
selectivity
→
sensitivity → |
| isStandardArchitectureFor |
modern radio receivers
→
|
| isUsedIn |
AM broadcast receivers
→
FM broadcast receivers → cellular radio receivers → communications receivers → radar receivers → satellite receivers → shortwave receivers → television receivers → two-way radio equipment → |
| keyConcept |
heterodyning
→
image frequency → intermediate frequency → selectivity → sensitivity → |
| operatesOn |
radio frequency signals
→
|
| requires |
frequency-stable local oscillator
→
good front-end filtering → |
| uses |
frequency conversion
→
|
| usesComponent |
RF amplifier
→
audio frequency amplifier → detector → intermediate frequency amplifier → local oscillator → mixer → tuned circuits → |
| wasDevelopedDuring |
World War I
→
|
| wasInventedBy |
Edwin Howard Armstrong
→
|
| wasInventedInYear |
1918
→
|
Referenced by (1)
| Subject (surface form when different) | Predicate |
|---|---|
|
Edwin H. Armstrong
→
|
notableWork |