JPS5535544A - Sound buzz erasing unit of television receiver - Google Patents
Sound buzz erasing unit of television receiverInfo
- Publication number
- JPS5535544A JPS5535544A JP10877278A JP10877278A JPS5535544A JP S5535544 A JPS5535544 A JP S5535544A JP 10877278 A JP10877278 A JP 10877278A JP 10877278 A JP10877278 A JP 10877278A JP S5535544 A JPS5535544 A JP S5535544A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- sound
- inputted
- signals
- terminal
- 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
- 230000005236 sound signal Effects 0.000 abstract 5
- 238000001514 detection method Methods 0.000 abstract 3
- 230000001419 dependent effect Effects 0.000 abstract 1
Landscapes
- Picture Signal Circuits (AREA)
- Television Receiver Circuits (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE: To use a logical operation circuit to erase buzz dependent upon non- linearity of an amplifier when the sound signal amplitude is small in a television receiver.
CONSTITUTION: Video signals from terminal a are inputted to video signal border part detection circuit d to detect the border part of video signals, and the output is inputted to one input of logical operation circuit f, and then, sound signals inputted from terminal b are inputted to sound signal level detection circuit e to detect the low amplitude level of sound signals, and the detected level is inputted to the other input of circuit f. AND between two inputs is operated by circuit f, and the output is appled to sound muting circuit g to turn on and off muting, and the time relation is so adjusted that sound signals having the same time as the amplitude change of video signals may be led out at a turn-on time. In circuit d, video signals from terminal 1 have the border part outputted to terminal 3 by a differential amplifier consisting of transistors 5 and 6, and detection signals of rise and break of the border part are detected by transistors 7 and 8.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10877278A JPS5535544A (en) | 1978-09-05 | 1978-09-05 | Sound buzz erasing unit of television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10877278A JPS5535544A (en) | 1978-09-05 | 1978-09-05 | Sound buzz erasing unit of television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5535544A true JPS5535544A (en) | 1980-03-12 |
Family
ID=14493087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10877278A Pending JPS5535544A (en) | 1978-09-05 | 1978-09-05 | Sound buzz erasing unit of television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5535544A (en) |
-
1978
- 1978-09-05 JP JP10877278A patent/JPS5535544A/en active Pending
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