JPS5673984A - Audio circuit for television receiver - Google Patents
Audio circuit for television receiverInfo
- Publication number
- JPS5673984A JPS5673984A JP15116379A JP15116379A JPS5673984A JP S5673984 A JPS5673984 A JP S5673984A JP 15116379 A JP15116379 A JP 15116379A JP 15116379 A JP15116379 A JP 15116379A JP S5673984 A JPS5673984 A JP S5673984A
- Authority
- JP
- Japan
- Prior art keywords
- video
- detector
- output
- audio
- amplifier
- 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
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
- H04N5/62—Intercarrier circuits, i.e. heterodyning sound and vision carriers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
Abstract
PURPOSE:To obtain a TV receiver less in the cross modulation beat for 920kHz and buzz sound, by performing beat detection with an audio carrier, after completely rejecting the amplitude modulation components by providing an amplification limiter of video IF. CONSTITUTION:The IF output of video and audio from a tuner 1 is amplified at one amplifier 9. In this case, video carrier is picked up from the video carrier pickup section of a low level video detector 10 succeeded to the amplifier 9 and fed to an amplification limiter 11. Further, the output and the audio IF picked up before the detector 10 are mixed at a detector 12, and the intercarrier signal in the difference frequency 4.5MHz is output. The signal is restored in the original audio signal at the FM detector in 4.5MHz and output from a speaker 8 via an amplifier 7. Thus, a TV receiver less in the cross modulation beat for 920kHz and buzz tone is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15116379A JPS5673984A (en) | 1979-11-21 | 1979-11-21 | Audio circuit for television receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15116379A JPS5673984A (en) | 1979-11-21 | 1979-11-21 | Audio circuit for television receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5673984A true JPS5673984A (en) | 1981-06-19 |
Family
ID=15512699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15116379A Pending JPS5673984A (en) | 1979-11-21 | 1979-11-21 | Audio circuit for television receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5673984A (en) |
-
1979
- 1979-11-21 JP JP15116379A patent/JPS5673984A/en active Pending
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