JPS5735490A - Switching circuit for television audio signal - Google Patents
Switching circuit for television audio signalInfo
- Publication number
- JPS5735490A JPS5735490A JP11090480A JP11090480A JPS5735490A JP S5735490 A JPS5735490 A JP S5735490A JP 11090480 A JP11090480 A JP 11090480A JP 11090480 A JP11090480 A JP 11090480A JP S5735490 A JPS5735490 A JP S5735490A
- Authority
- JP
- Japan
- Prior art keywords
- audio signal
- turned
- modulation circuit
- playback
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE:To make smooth the transition to a recording mode and to surely prevent the interference of FM audio signal to a reproduced video luminance signal, by making oscillation waiting state without disconnecting the power source of an FM audio modulation circuit in a playback mode. CONSTITUTION:In recording mode, a switch 39 is turned off, and a recording audio signal from a terminal 25 is picked up from a terminal 45 via an FM modulation circuit 13 consisting of transistors TRs 28, 29 and a TR42 to execute magnetic recording. When the switch 39 is turned on to assume playback mode, a bias higher than an emitter potential Ve is given to the base of a TR43 by a power source V0 to constitute a switching circuit 14. At the same time, a TR37 is turned on, the oscillation of an FM modulation circuit 13 is stopped, the TR24 is turned off, and a playback FM input audio signal from a terminal 40 can be picked up from an output terminal 45. Thus, at playback, no interference of audio signal for the video signal at the oscillation waiting state in the FM modulation circuit is given and audio signals with good quality can be obtained at recording mode immediately.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11090480A JPS5735490A (en) | 1980-08-12 | 1980-08-12 | Switching circuit for television audio signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11090480A JPS5735490A (en) | 1980-08-12 | 1980-08-12 | Switching circuit for television audio signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5735490A true JPS5735490A (en) | 1982-02-26 |
Family
ID=14547606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11090480A Pending JPS5735490A (en) | 1980-08-12 | 1980-08-12 | Switching circuit for television audio signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5735490A (en) |
-
1980
- 1980-08-12 JP JP11090480A patent/JPS5735490A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MY100692A (en) | Videorecorder with recording of a videotext signal. | |
JPS5738091A (en) | Color television receiver | |
JPS5735490A (en) | Switching circuit for television audio signal | |
GB931525A (en) | Systems for preventing drop-out in video tape reproduction | |
JPS5780879A (en) | Magnetic recording and reproducing device | |
KR960008728B1 (en) | High frequency switching circuit of vcr | |
JPS5746369A (en) | Signal switching circuit of magnetic picture recorder and reproducer | |
JPS5717277A (en) | Raster blanking circuit | |
JPS57190473A (en) | Switching unit for high frequency video signal | |
KR890004966Y1 (en) | Automatic tv channel selecting circuit | |
JPS5635586A (en) | Burst gate amplifying circuit | |
JPS645276A (en) | Video telephone system | |
KR940001617Y1 (en) | Audio recording control circuit for hi-fi vtr | |
JPS6476558A (en) | Video signal recorder | |
JPS54146925A (en) | Magnetic recording and reproducing device | |
JPS5787681A (en) | Automatic mode switching device | |
JPS6424580A (en) | Picture in-picture vtr | |
JPS6460158A (en) | Television receiver | |
KR910008978Y1 (en) | Rf signal selection circuit for vtr | |
KR870002269Y1 (en) | Image signal automatic selection circuit of vtr | |
JPS6441587A (en) | Magnetic recording and reproducing device | |
JPS6468186A (en) | Reproducing device | |
JPS53111707A (en) | Tv receiver with video recording function | |
JPS57123775A (en) | Video tape recorder | |
JPS5465008A (en) | Television receiver with magnetic video recorder- reproducer |