JPS57190462A - Horizontal deflecting circuit - Google Patents
Horizontal deflecting circuitInfo
- Publication number
- JPS57190462A JPS57190462A JP56074316A JP7431681A JPS57190462A JP S57190462 A JPS57190462 A JP S57190462A JP 56074316 A JP56074316 A JP 56074316A JP 7431681 A JP7431681 A JP 7431681A JP S57190462 A JPS57190462 A JP S57190462A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- horizontal
- output
- phase detecting
- afc
- 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
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To approximately double the number of scanning lines by dividing and inputting a horizontal synchronizing signal with the doubled frequency into the inputs of 2 horizontal deflecting circuits whose phases are different by 1/4 horizontal period each other and switching these horizontal deflecting circuits in every 1 field period. CONSTITUTION:When a horizontal synchronizing signal fh in the NTSC system is inputted to an input terminal of a double multiplying circuit 1, the input signal is converted into a doubled signals 2fh and one of these signals is applied to the 1st AFC circuit consisting of a phase detecting circuit 3a, a filter circuit 4a and a voltage controlled oscillator (VCO) 5a. When a changeover switch is in the shown position, an output from the 1st AFC circuit is supplied to a horizontal output circuit 6 and returned to a phase detecting circuit 3a through a level converting circuit 7. The other output out of 2fh is shifted by 1/4H by a phase shifting circuit 2 and the shifted output is applied to the 2nd AFC circuit consisting of a phase detecting circuit 3b, a filter circuit 4b and a VCO 5b. The output of the 2nd AFC circuit is returned to the phase detecting circuit 3b. Each changeover switch 8 is switched in every 1 field period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56074316A JPS57190462A (en) | 1981-05-19 | 1981-05-19 | Horizontal deflecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56074316A JPS57190462A (en) | 1981-05-19 | 1981-05-19 | Horizontal deflecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57190462A true JPS57190462A (en) | 1982-11-24 |
Family
ID=13543586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56074316A Pending JPS57190462A (en) | 1981-05-19 | 1981-05-19 | Horizontal deflecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57190462A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0197699A2 (en) * | 1985-04-01 | 1986-10-15 | RCA Thomson Licensing Corporation | Television sychronizing apparatus |
| EP0200348A2 (en) * | 1985-04-01 | 1986-11-05 | RCA Thomson Licensing Corporation | Line deflection system |
-
1981
- 1981-05-19 JP JP56074316A patent/JPS57190462A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0197699A2 (en) * | 1985-04-01 | 1986-10-15 | RCA Thomson Licensing Corporation | Television sychronizing apparatus |
| EP0200348A2 (en) * | 1985-04-01 | 1986-11-05 | RCA Thomson Licensing Corporation | Line deflection system |
| JPH0774978A (en) * | 1985-04-01 | 1995-03-17 | Rca Thomson Licensing Corp | Television set |
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