JPS5782213A - Demodulating system for fm video signal - Google Patents
Demodulating system for fm video signalInfo
- Publication number
- JPS5782213A JPS5782213A JP55158475A JP15847580A JPS5782213A JP S5782213 A JPS5782213 A JP S5782213A JP 55158475 A JP55158475 A JP 55158475A JP 15847580 A JP15847580 A JP 15847580A JP S5782213 A JPS5782213 A JP S5782213A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- circuit
- beat
- inputted
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/02—Analogue recording or reproducing
- G11B20/06—Angle-modulation recording or reproducing
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE:To achieve excellent video quality without beat, by constituting the system with a circuit frequency-multiplying an FM signal, filter circuit picking up fundamental wave component from the multiplied FM signal, and circuit frequency-detecting said filter circuit output signal. CONSTITUTION:An FM signal obtained from a reproducing amplifier is inputted to a frequency multiplier 23 and after converted into n-times (where; n is an integer, n>=3) the carrier frequency of the FM signal, it is applied to a band-pass filter 24, where only n-times frequency signals pass, and this passing signal is inputted to a frequency detector 25. After demodulation at said frequency detector 25, the signal is applied to a low-pass filter 26 and a video signal is obtained. Thus, unnecessary carrier component, side band or its harmonic components are all attenuated, no beat is produced and the video quality of reproduction with excellent S/N can be achieved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55158475A JPS5782213A (en) | 1980-11-11 | 1980-11-11 | Demodulating system for fm video signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55158475A JPS5782213A (en) | 1980-11-11 | 1980-11-11 | Demodulating system for fm video signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5782213A true JPS5782213A (en) | 1982-05-22 |
Family
ID=15672547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55158475A Pending JPS5782213A (en) | 1980-11-11 | 1980-11-11 | Demodulating system for fm video signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5782213A (en) |
-
1980
- 1980-11-11 JP JP55158475A patent/JPS5782213A/en active Pending
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