JPS5778283A - Video detection circuit - Google Patents
Video detection circuitInfo
- Publication number
- JPS5778283A JPS5778283A JP15437780A JP15437780A JPS5778283A JP S5778283 A JPS5778283 A JP S5778283A JP 15437780 A JP15437780 A JP 15437780A JP 15437780 A JP15437780 A JP 15437780A JP S5778283 A JPS5778283 A JP S5778283A
- Authority
- JP
- Japan
- Prior art keywords
- video detection
- detection circuit
- base
- reliability
- ground
- 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
- H04N5/455—Demodulation-circuits
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To increase the reliability of transistors (TRs), by inserting 1 or >=2 of Zener diodes between the base and ground of an output TR of a video detection circuit, in the video detection circuit with a black noise reversing circuit. CONSTITUTION:Since a Zener diode 22 is inserted between the base and ground of a video detection output TR12, even if the input signal at an input terminal 1 is in any state, the base voltage of the TR12 does not exceed the dielectric strength and no reverse current flows to the base-emitter of a TR14. Thus, the TR14 is operated at a region without problem on reliability at all times.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15437780A JPS5778283A (en) | 1980-10-31 | 1980-10-31 | Video detection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15437780A JPS5778283A (en) | 1980-10-31 | 1980-10-31 | Video detection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5778283A true JPS5778283A (en) | 1982-05-15 |
Family
ID=15582814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15437780A Pending JPS5778283A (en) | 1980-10-31 | 1980-10-31 | Video detection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5778283A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0419879U (en) * | 1990-05-31 | 1992-02-19 |
-
1980
- 1980-10-31 JP JP15437780A patent/JPS5778283A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0419879U (en) * | 1990-05-31 | 1992-02-19 |
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