Signal tuning with variable intermediate frequency for image rejection and methods
The invention relates to signal tuning with variable intermediate frequency for image rejection and methods. In a method and apparatus for operating a super-heterodyne receiver, a tuning circuit has a local oscillator for frequency shifting a desired channel to a selected frequency and a controller...
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| Main Authors | , , , |
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| Format | Patent |
| Language | Chinese English |
| Published |
14.11.2012
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| Subjects | |
| Online Access | Get full text |
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| Abstract | The invention relates to signal tuning with variable intermediate frequency for image rejection and methods. In a method and apparatus for operating a super-heterodyne receiver, a tuning circuit has a local oscillator for frequency shifting a desired channel to a selected frequency and a controller for controlling the local oscillator. The controller determines for each of a number of identified channels, whether an image signal is present at frequencies in the spectrum that when tuned to a first selected frequency interfere, and is operable to select a modified selected frequency at which interference between the image signal and the identified channel is reduced. |
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| AbstractList | The invention relates to signal tuning with variable intermediate frequency for image rejection and methods. In a method and apparatus for operating a super-heterodyne receiver, a tuning circuit has a local oscillator for frequency shifting a desired channel to a selected frequency and a controller for controlling the local oscillator. The controller determines for each of a number of identified channels, whether an image signal is present at frequencies in the spectrum that when tuned to a first selected frequency interfere, and is operable to select a modified selected frequency at which interference between the image signal and the identified channel is reduced. |
| Author | CHENG GARY JANTZI STEPHEN A TRYHUB JOHN GREGGAIN LANCE |
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| Notes | Application Number: CN2011805760 |
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| RelatedCompanies | FRESCO MICROCHIP INC |
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| Snippet | The invention relates to signal tuning with variable intermediate frequency for image rejection and methods. In a method and apparatus for operating a... |
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| SubjectTerms | BASIC ELECTRONIC CIRCUITRY DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY SELECTING RESONANT CIRCUITS TRANSMISSION TUNING RESONANT CIRCUITS |
| Title | Signal tuning with variable intermediate frequency for image rejection and methods |
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