| dbo:abstract |
In a low-IF receiver, the RF signal is mixed down to a non-zero low or moderate intermediate frequency, typically a few megahertz (instead of 33–40 MHz) for TV, and even lower frequencies (typically 120–130 kHz instead of 10.7–10.8 MHz or 13.45 MHz) in the case of FM radio band receivers or (455–470 kHz for) AM (MW/LW/SW) receivers. Low-IF receiver topologies have many of the desirable properties of zero-IF architectures, but avoid the DC offset and 1/f noise problems. The use of a non-zero IF re-introduces the image issue. However, when there are relatively relaxed image and neighbouring channel rejection requirements they can be satisfied by carefully designed low-IF receivers. Image signal and unwanted blockers can be rejected by quadrature down-conversion (complex mixing) and subsequent filtering. This technique is now widely used in the tiny FM receivers incorporated into MP3 players and mobile phones and is becoming commonplace in both analog and digital TV receiver designs. Using advanced analog- and digital signal processing techniques, cheap, high quality receivers using no resonant circuits at all are now possible. * v * t * e * v * t * e (en) |
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3160940 (xsd:integer) |
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1745 (xsd:nonNegativeInteger) |
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1044909396 (xsd:integer) |
| dbo:wikiPageWikiLink |
dbr:Electronic_filter dbr:Intermediate_frequency dbr:Quadrature_down-conversion dbr:Analog_signal_processing dbr:Mobile_phone dbr:MP3 dbr:Signal_(electrical_engineering) dbc:Receiver_(radio) dbr:Analog_television dbc:Radio_electronics dbr:Hertz dbc:Communication_circuits dbr:Digital_signal_processing dbr:Digital_television dbr:Frequency_modulation dbr:DC_offset dbr:Radio_Frequency dbr:Selectivity_(radio) dbr:Image_response dbr:Resonant_circuit dbr:1/f_noise dbr:Zero-IF_receiver |
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dbt:Radio-stub dbt:Short_description dbt:Unreferenced dbt:Electronics-stub |
| dct:subject |
dbc:Receiver_(radio) dbc:Radio_electronics dbc:Communication_circuits |
| rdf:type |
yago:WikicatCommunicationCircuits yago:Artifact100021939 yago:Circuit103033362 yago:Device103183080 yago:ElectricalDevice103269401 yago:Instrumentality103575240 yago:Object100002684 yago:PhysicalEntity100001930 yago:Whole100003553 |
| rdfs:comment |
In a low-IF receiver, the RF signal is mixed down to a non-zero low or moderate intermediate frequency, typically a few megahertz (instead of 33–40 MHz) for TV, and even lower frequencies (typically 120–130 kHz instead of 10.7–10.8 MHz or 13.45 MHz) in the case of FM radio band receivers or (455–470 kHz for) AM (MW/LW/SW) receivers. Low-IF receiver topologies have many of the desirable properties of zero-IF architectures, but avoid the DC offset and 1/f noise problems. * v * t * e * v * t * e (en) |
| rdfs:label |
Low IF receiver (en) |
| owl:sameAs |
freebase:Low IF receiver yago-res:Low IF receiver wikidata:Low IF receiver https://global.dbpedia.org/id/4qcYu |
| prov:wasDerivedFrom |
wikipedia-en:Low_IF_receiver?oldid=1044909396&ns=0 |
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wikipedia-en:Low_IF_receiver |
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dbr:Low-IF_receiver dbr:Low-intermediate-frequency_receiver dbr:Low_intermediate-frequency_receiver dbr:Low_intermediate_frequency_receiver |
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dbr:Intermediate_frequency dbr:Low-IF_receiver dbr:Low-intermediate-frequency_receiver dbr:Low_intermediate-frequency_receiver dbr:Low_intermediate_frequency_receiver dbr:Tuned_radio_frequency_receiver dbr:Direct-conversion_receiver dbr:Neutrodyne |
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wikipedia-en:Low_IF_receiver |