JPS54139335A - Phase error correcting circuit of index signal - Google Patents
Phase error correcting circuit of index signalInfo
- Publication number
- JPS54139335A JPS54139335A JP4887078A JP4887078A JPS54139335A JP S54139335 A JPS54139335 A JP S54139335A JP 4887078 A JP4887078 A JP 4887078A JP 4887078 A JP4887078 A JP 4887078A JP S54139335 A JPS54139335 A JP S54139335A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- signals
- phase error
- inputted
- output
- 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
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
PURPOSE: To obtain a circuit which corrects the phase error of ID signals suitably, by generating the phase error of index ID signals falsely by a monostable multivibrator in a beam index-type color TV receiver.
CONSTITUTION: The output of fixed-frequency pulse oscillator 13 is inputted to the first tuning amplifier 14 to generate sine wave signal f1. The output of monostable multivibrator 15 which is triggerred by the pulse of oscillator 13 and is controlled by a monochromatic (M) signal is inputted to the second tuning amplifier 16, and sine wave signals of frequency f2 are generated from amplifier 16 and are inputted to difference frequency converter 18. since monostable multivibrator 15 outputs signals of a narrow pulse width and a wide pulse width in case of a large M signal and a small M signal respectively, signal f2 has the phase advanced in case of a large M signal and delayed in case of a small M signal. ID signals of frequency fi from terminal 21 become sine wave signal fi in the third tuning amplifier 17 and are inputted to converter 18 to obtain output signal fi-f2. The output of converter 18 is added to sum frequency converter 19 together with signal f1 to obtain signal fi+f1-f2 with phase error eliminated, and this signal is combined with video signals by combining circuit 9.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4887078A JPS54139335A (en) | 1978-04-20 | 1978-04-20 | Phase error correcting circuit of index signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4887078A JPS54139335A (en) | 1978-04-20 | 1978-04-20 | Phase error correcting circuit of index signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54139335A true JPS54139335A (en) | 1979-10-29 |
Family
ID=12815313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4887078A Pending JPS54139335A (en) | 1978-04-20 | 1978-04-20 | Phase error correcting circuit of index signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54139335A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333105A (en) * | 1979-08-22 | 1982-06-01 | Hitachi, Ltd. | Beam-indexing color television receiver |
-
1978
- 1978-04-20 JP JP4887078A patent/JPS54139335A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333105A (en) * | 1979-08-22 | 1982-06-01 | Hitachi, Ltd. | Beam-indexing color television receiver |
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