JPS5535541A - Vertical synchronizing pulse detection circuit - Google Patents
Vertical synchronizing pulse detection circuitInfo
- Publication number
- JPS5535541A JPS5535541A JP10866778A JP10866778A JPS5535541A JP S5535541 A JPS5535541 A JP S5535541A JP 10866778 A JP10866778 A JP 10866778A JP 10866778 A JP10866778 A JP 10866778A JP S5535541 A JPS5535541 A JP S5535541A
- Authority
- JP
- Japan
- Prior art keywords
- inputted
- vertical synchronizing
- pulses
- detection circuit
- circuit
- 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
Landscapes
- Synchronizing For Television (AREA)
- Color Television Systems (AREA)
Abstract
PURPOSE: To prevent killer and emphasis gates from being operated even if a noise equivalent to vetical synchronizing pulses is inputted.
CONSTITUTION: When switching pulse (a) is inputted to terminal 1, this pulse is converted to trigger pulse (b) by trigger pulse generation circuit 2. Trigger pulse (b) becomes the set signal of RS flip flop 4. Then, the reset signal is inputted after vertical synchronizing detection pulses are obtained, and a gate signal shown in (d) is obtained on output line 10. Composite synchronizing signal (e) is inputted to the other input of AND circuit 6. A blocking pulse group shown in (f) is obtained at output 11 of AND circuit 6, and pulses shown in (g) are obtained in vertical synchronizing detection circuit 7. Consequently, synchronizing signals are inputted to vertical synchronizing detection circuit 7 only when gate pulses shown is (d) are high, thus detecting vertical synchronizing signals.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10866778A JPS5535541A (en) | 1978-09-06 | 1978-09-06 | Vertical synchronizing pulse detection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10866778A JPS5535541A (en) | 1978-09-06 | 1978-09-06 | Vertical synchronizing pulse detection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5535541A true JPS5535541A (en) | 1980-03-12 |
Family
ID=14490616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10866778A Pending JPS5535541A (en) | 1978-09-06 | 1978-09-06 | Vertical synchronizing pulse detection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5535541A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0138261A2 (en) * | 1983-10-18 | 1985-04-24 | American Microsystems, Incorporated | Differential operational amplifier with common mode feedback |
WO1985005001A1 (en) * | 1984-04-24 | 1985-11-07 | Matsushita Electric Industrial Co., Ltd. | Device for correcting time axis |
-
1978
- 1978-09-06 JP JP10866778A patent/JPS5535541A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0138261A2 (en) * | 1983-10-18 | 1985-04-24 | American Microsystems, Incorporated | Differential operational amplifier with common mode feedback |
WO1985005001A1 (en) * | 1984-04-24 | 1985-11-07 | Matsushita Electric Industrial Co., Ltd. | Device for correcting time axis |
US4733312A (en) * | 1984-04-24 | 1988-03-22 | Matsushita Electric Industrial Co., Ltd. | Time-base corrector |
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