CA2381998C - Technique et dispositif ameliores pour transposition elevatrice de signaux de radiofrequence (rf) - Google Patents
Technique et dispositif ameliores pour transposition elevatrice de signaux de radiofrequence (rf) Download PDFInfo
- Publication number
- CA2381998C CA2381998C CA2381998A CA2381998A CA2381998C CA 2381998 C CA2381998 C CA 2381998C CA 2381998 A CA2381998 A CA 2381998A CA 2381998 A CA2381998 A CA 2381998A CA 2381998 C CA2381998 C CA 2381998C
- Authority
- CA
- Canada
- Prior art keywords
- phi
- signal
- convertor
- radio frequency
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/30—Circuits for homodyne or synchrodyne receivers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
- H03D3/008—Compensating DC offsets
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
- H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
- H03D7/166—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Superheterodyne Receivers (AREA)
Abstract
Cette invention concerne une technique et un dispositif permettant de résoudre le problème de fuite au niveau de l'oscillateur local en cas de conversion directe et emploi d'émetteurs RF analogues. Pour résoudre ce problème, on génère au sein de la bande de base un signal d'oscillateur local virtuel qui est syntonisé avec le signal RF entrant. Le signal d'oscillateur local virtuel (VLO) est obtenu au moyen de signaux n'ayant pas de puissance significative (voire n'ayant aucune puissance) à la fréquence RF d'entrée recherchée. Toute erreur survenue dans la production du signal de l'oscillateur local virtuel est réduite au minimum au moyen d'un système de correction à boucle fermée.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2381998A CA2381998C (fr) | 1999-09-01 | 2000-09-01 | Technique et dispositif ameliores pour transposition elevatrice de signaux de radiofrequence (rf) |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2281236A CA2281236C (fr) | 1999-09-01 | 1999-09-01 | Methodes rf de conversion directe au moyen d'un signal virtuel d'oscillateur local |
| CA2,281,236 | 1999-09-01 | ||
| PCT/CA2000/000995 WO2001017121A1 (fr) | 1999-09-01 | 2000-09-01 | Technique et dispositif ameliores pour transposition elevatrice de signaux de radiofrequence (rf) |
| CA2381998A CA2381998C (fr) | 1999-09-01 | 2000-09-01 | Technique et dispositif ameliores pour transposition elevatrice de signaux de radiofrequence (rf) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2381998A1 CA2381998A1 (fr) | 2001-03-08 |
| CA2381998C true CA2381998C (fr) | 2010-02-16 |
Family
ID=25681159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2381998A Expired - Fee Related CA2381998C (fr) | 1999-09-01 | 2000-09-01 | Technique et dispositif ameliores pour transposition elevatrice de signaux de radiofrequence (rf) |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2381998C (fr) |
-
2000
- 2000-09-01 CA CA2381998A patent/CA2381998C/fr not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2381998A1 (fr) | 2001-03-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |