JPS5454522A - Frequency converter - Google Patents
Frequency converterInfo
- Publication number
- JPS5454522A JPS5454522A JP12165277A JP12165277A JPS5454522A JP S5454522 A JPS5454522 A JP S5454522A JP 12165277 A JP12165277 A JP 12165277A JP 12165277 A JP12165277 A JP 12165277A JP S5454522 A JPS5454522 A JP S5454522A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- terminal
- fed
- carrier
- signal
- 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.)
- Granted
Links
Abstract
PURPOSE: To enable to establish the reproduced picture without color unevenness, by performing the frequency conversion for the carrier chrominance signal based on the carrier having the frequency corresponding to the sum and difference between the carrier frequency of the carrier chrominance signal and a given carrier frequency.
CONSTITUTION: The signal in frequency fc[(44-1/4)fh; where: fh is horizontal frequency] from the AFC circuit 5 of the frequency converter and the signal in frequency fs from the crystal oscillator 6 are fed to the frequency converter 7, the output is fed to the BPF 8 and 9 through which the carriers Sr1 and Sr2 in frequency fs+fc(about 4.27 MHz) and fs-fc(about 2.89 MHz) are passed, and the signals are fed to the input terminals a and b of the circuit 10. Further, FF34 is triggered with the horizontal synchronizing signal Ph, the switching pulse Ps is the pulse in frequency 2fh causing high or low level every one horizohtal period, and the output terminal C is connected to the terminal a for the one horizontal period of high level and the terminal C is connected to the terminal b at low level. Further, Sr1 and Sr2 are alternately taken place at the terminal C every one horizontal period, and this is fed to the frequency converter 3
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52121652A JPS6033032B2 (en) | 1977-10-11 | 1977-10-11 | video tape recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52121652A JPS6033032B2 (en) | 1977-10-11 | 1977-10-11 | video tape recorder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5454522A true JPS5454522A (en) | 1979-04-28 |
JPS6033032B2 JPS6033032B2 (en) | 1985-07-31 |
Family
ID=14816540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52121652A Expired JPS6033032B2 (en) | 1977-10-11 | 1977-10-11 | video tape recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6033032B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06165218A (en) * | 1992-11-17 | 1994-06-10 | Matsushita Electric Ind Co Ltd | Video signal generator |
-
1977
- 1977-10-11 JP JP52121652A patent/JPS6033032B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06165218A (en) * | 1992-11-17 | 1994-06-10 | Matsushita Electric Ind Co Ltd | Video signal generator |
Also Published As
Publication number | Publication date |
---|---|
JPS6033032B2 (en) | 1985-07-31 |
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