JPS5769507A - Fm demodulating circuit - Google Patents
Fm demodulating circuitInfo
- Publication number
- JPS5769507A JPS5769507A JP55144384A JP14438480A JPS5769507A JP S5769507 A JPS5769507 A JP S5769507A JP 55144384 A JP55144384 A JP 55144384A JP 14438480 A JP14438480 A JP 14438480A JP S5769507 A JPS5769507 A JP S5769507A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- supplied
- amplifying circuit
- carrier component
- bands
- 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 demodulate an FM signal with less distortion, by selectively amplifying and emphasizing the carrier component of the FM signal by using a selective amplifying circuit, etc. CONSTITUTION:An FM signal having unbalance between both side wave bands of a low carrier FM system is supplied from an input 4 to a BPF1 to eliminate the signal in an unnecessary band, and then the resulting signal is supplied to a selective amplifying circuit 20 to be amplified so that the level of the carrier component is emphasized more than that of both side-bands. The output of the elective amplifying circuit 20 is passed through a limiter amplifier 2 to eliminate an AM component and supplied to an FM detector 3 to generate a carrier component at an output 5. In this case, the carrier component of the FM signal supplied to an FM detector 5 is emphasized by the selective amplifying circuit 20, large distortion is not generated even if both side-bands become unbalanced. Thus, the FM signal is demodulated stably with less distortion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55144384A JPS5769507A (en) | 1980-10-17 | 1980-10-17 | Fm demodulating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55144384A JPS5769507A (en) | 1980-10-17 | 1980-10-17 | Fm demodulating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5769507A true JPS5769507A (en) | 1982-04-28 |
Family
ID=15360872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55144384A Pending JPS5769507A (en) | 1980-10-17 | 1980-10-17 | Fm demodulating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5769507A (en) |
-
1980
- 1980-10-17 JP JP55144384A patent/JPS5769507A/en active Pending
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