DE3223904C2 - - Google Patents
Info
- Publication number
- DE3223904C2 DE3223904C2 DE19823223904 DE3223904A DE3223904C2 DE 3223904 C2 DE3223904 C2 DE 3223904C2 DE 19823223904 DE19823223904 DE 19823223904 DE 3223904 A DE3223904 A DE 3223904A DE 3223904 C2 DE3223904 C2 DE 3223904C2
- Authority
- DE
- Germany
- Prior art keywords
- filter
- pass
- circuit
- channel
- voltage
- 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 - Lifetime
Links
Classifications
-
- 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
- H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for
-
- 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
- H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
- H03D3/003—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback
- H03D3/004—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback wherein the demodulated signal is used for controlling an oscillator, e.g. the local oscillator
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
- Transmitters (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823223904 DE3223904A1 (de) | 1982-06-26 | 1982-06-26 | Filter- und demodulationsschaltung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823223904 DE3223904A1 (de) | 1982-06-26 | 1982-06-26 | Filter- und demodulationsschaltung |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3223904A1 DE3223904A1 (de) | 1983-12-29 |
DE3223904C2 true DE3223904C2 (fr) | 1991-02-28 |
Family
ID=6166926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19823223904 Granted DE3223904A1 (de) | 1982-06-26 | 1982-06-26 | Filter- und demodulationsschaltung |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3223904A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3606250A1 (de) * | 1986-02-24 | 1987-08-27 | Hansen Elektronic & Co | Verfahren und vorrichtung zum umsetzen frequenzmodulierter signale ueber mindestens eine zwischenfrequenz in niederfrequenzsignale |
US7596195B2 (en) * | 2004-03-31 | 2009-09-29 | Broadcom Corporation | Bandpass filter with reversible IQ polarity to enable a high side or low side injection receiver architecture |
US7603098B2 (en) | 2004-03-31 | 2009-10-13 | Broadcom Corporation | Programmable IF frequency filter for enabling a compromise between DC offset rejection and image rejection |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3873931A (en) * | 1973-10-05 | 1975-03-25 | Comstron Corp | FM demodulator circuits |
-
1982
- 1982-06-26 DE DE19823223904 patent/DE3223904A1/de active Granted
Also Published As
Publication number | Publication date |
---|---|
DE3223904A1 (de) | 1983-12-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8125 | Change of the main classification |
Ipc: H03D 3/00 |
|
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licenses declared (paragraph 23) |