FR2448822A1 - Multi-standard TV receiver - eliminates tunable audio IF amplifier by incorporating extra mixer and oscillator - Google Patents
Multi-standard TV receiver - eliminates tunable audio IF amplifier by incorporating extra mixer and oscillatorInfo
- Publication number
- FR2448822A1 FR2448822A1 FR8001342A FR8001342A FR2448822A1 FR 2448822 A1 FR2448822 A1 FR 2448822A1 FR 8001342 A FR8001342 A FR 8001342A FR 8001342 A FR8001342 A FR 8001342A FR 2448822 A1 FR2448822 A1 FR 2448822A1
- Authority
- FR
- France
- Prior art keywords
- oscillator
- audio
- amplifier
- mixer
- receiver
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Superheterodyne Receivers (AREA)
Abstract
The T.V. receiver has an extra mixer connected to the input side of the audio i.f. amplifier. The extra mixer is connected to an extra oscillator whose frequency can be changed over. The mixer is fed by the oscillator's output and the t.v. signal from the receive stage. The oscillator's frequencies are chosen to comply with the various standards of t.v. signal. The extra oscillator operates at a frequency equal to the difference between the audio i.f. signal from the receive stage and the pass band frequency of the audio i.f. amplifier. The advantage lies in avoiding the tendency of tunable audio i.f. amplifiers to oscillate and frequency-dependent gain.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792904565 DE2904565B2 (en) | 1979-02-07 | 1979-02-07 | Multi-standard television receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2448822A1 true FR2448822A1 (en) | 1980-09-05 |
Family
ID=6062356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8001342A Pending FR2448822A1 (en) | 1979-02-07 | 1980-01-22 | Multi-standard TV receiver - eliminates tunable audio IF amplifier by incorporating extra mixer and oscillator |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2904565B2 (en) |
FR (1) | FR2448822A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2559634A1 (en) * | 1984-02-15 | 1985-08-16 | Alps Electric Co Ltd | Wideband tuner for TV receiver |
FR2602388A1 (en) * | 1986-07-29 | 1988-02-05 | Standard Elektrik Lorenz Ag | Dual standard reception tuner for TV receiver |
FR2717335A1 (en) * | 1994-03-08 | 1995-09-15 | Samsung Electronics Co Ltd | Audio demodulator of a PAL television system, and more particularly, a circuit for using a common audio demodulator in the television system Pal. |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI63508C (en) * | 1981-02-11 | 1983-06-10 | Salora Oy | KOPPLING VID EN TELEVISIONSMOTTAGARE FOER DETEKTERING AV LJUDSIGNALER SOM SAENTS ENLIGT OLIKA SAENDNINGSNORMER |
DE3346981A1 (en) * | 1983-12-24 | 1985-07-04 | Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover | Audio IF amplifier for a multi-standard television receiver |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1093380A (en) * | 1953-02-20 | 1955-05-03 |
-
1979
- 1979-02-07 DE DE19792904565 patent/DE2904565B2/en not_active Withdrawn
-
1980
- 1980-01-22 FR FR8001342A patent/FR2448822A1/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1093380A (en) * | 1953-02-20 | 1955-05-03 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2559634A1 (en) * | 1984-02-15 | 1985-08-16 | Alps Electric Co Ltd | Wideband tuner for TV receiver |
FR2602388A1 (en) * | 1986-07-29 | 1988-02-05 | Standard Elektrik Lorenz Ag | Dual standard reception tuner for TV receiver |
FR2717335A1 (en) * | 1994-03-08 | 1995-09-15 | Samsung Electronics Co Ltd | Audio demodulator of a PAL television system, and more particularly, a circuit for using a common audio demodulator in the television system Pal. |
Also Published As
Publication number | Publication date |
---|---|
DE2904565B2 (en) | 1981-05-07 |
DE2904565A1 (en) | 1980-08-14 |
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