JPS5714259A - Vertical synchronizing signal separation circuit - Google Patents
Vertical synchronizing signal separation circuitInfo
- Publication number
- JPS5714259A JPS5714259A JP9011180A JP9011180A JPS5714259A JP S5714259 A JPS5714259 A JP S5714259A JP 9011180 A JP9011180 A JP 9011180A JP 9011180 A JP9011180 A JP 9011180A JP S5714259 A JPS5714259 A JP S5714259A
- Authority
- JP
- Japan
- Prior art keywords
- synchronizing signal
- signal
- circuit
- vertical synchronizing
- signal separation
- 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
- H04N5/04—Synchronising
- H04N5/08—Separation of synchronising signals from picture signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Synchronizing For Television (AREA)
Abstract
PURPOSE:To make stable the circuit, by obtaining a vertical synchronizing signal separated from a pulse generating circuit delaying a television composite synchronizing signal for a given time limit and a latch circuit sampling and storing this as a clock signal. CONSTITUTION:A composite synchronizing signal (a) is inputted to a differentiator 4 to form an output waveform (b), and it is also supplied to a data input D of a D type FF5. A monostable circuit 6 constitutes a pulse generating circuit together with the device 4, and when it is triggered, a signal 6a having 1/4H pulse width as shown in the waveform (c) and this is taken as the clock signal and applied to a timing input T of the FF5. The FF5 operates as a latch circuit which samples and stores the logic level of the composite synchronizing signal at the trailing of the signal 6a and outputs a synchronizing signal (d) as a result. Thus, a stable vertical synchronizing signal can be obtained with good accuracy without being affected with temperature change and noise.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9011180A JPS5714259A (en) | 1980-06-30 | 1980-06-30 | Vertical synchronizing signal separation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9011180A JPS5714259A (en) | 1980-06-30 | 1980-06-30 | Vertical synchronizing signal separation circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5714259A true JPS5714259A (en) | 1982-01-25 |
Family
ID=13989400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9011180A Pending JPS5714259A (en) | 1980-06-30 | 1980-06-30 | Vertical synchronizing signal separation circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5714259A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58139770U (en) * | 1982-03-16 | 1983-09-20 | 日本電気株式会社 | Vertical synchronization signal separation circuit |
JPS58221574A (en) * | 1982-06-18 | 1983-12-23 | Sansui Electric Co | Detecting circuit of vertical synchronizing signal |
JPS5930371A (en) * | 1982-08-12 | 1984-02-17 | Matsushita Electric Ind Co Ltd | Synchronizing signal processing circuit |
JPS5980064A (en) * | 1982-10-29 | 1984-05-09 | Teac Co | Detector of vertical synchronizing signal |
US5349387A (en) * | 1993-09-21 | 1994-09-20 | Acer Peripherals, Inc. | Apparatus for detecting polarity of an input signal |
-
1980
- 1980-06-30 JP JP9011180A patent/JPS5714259A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58139770U (en) * | 1982-03-16 | 1983-09-20 | 日本電気株式会社 | Vertical synchronization signal separation circuit |
JPS58221574A (en) * | 1982-06-18 | 1983-12-23 | Sansui Electric Co | Detecting circuit of vertical synchronizing signal |
JPS5930371A (en) * | 1982-08-12 | 1984-02-17 | Matsushita Electric Ind Co Ltd | Synchronizing signal processing circuit |
JPH0218636B2 (en) * | 1982-08-12 | 1990-04-26 | Matsushita Electric Ind Co Ltd | |
JPS5980064A (en) * | 1982-10-29 | 1984-05-09 | Teac Co | Detector of vertical synchronizing signal |
US5349387A (en) * | 1993-09-21 | 1994-09-20 | Acer Peripherals, Inc. | Apparatus for detecting polarity of an input signal |
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