JPS5669905A - Fm demodulator - Google Patents
Fm demodulatorInfo
- Publication number
- JPS5669905A JPS5669905A JP14604779A JP14604779A JPS5669905A JP S5669905 A JPS5669905 A JP S5669905A JP 14604779 A JP14604779 A JP 14604779A JP 14604779 A JP14604779 A JP 14604779A JP S5669905 A JPS5669905 A JP S5669905A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- carrier
- circuit
- output
- cycles
- 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
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To obtain an excellent-S/N output by eliminating a carrier component even when the frequency of the carrier is low, by converting the period of a pulse string into a voltage and then by sampling and holding it at cycles of the carrier. CONSTITUTION:An FM signal applied to input terminal 7, after having an ampplitude-varying component eliminated by limiter 8, is converted into a pulse string constant in pulse width through differentiating circuit 9 and pulse waveform shaping circuit 10. This pulse string is supplied to differentiating circuit 11, which converts variations in cycles of the pulse string into the level shift extent, i.e. variations in voltage. The output of limiter 8, on the other hand, is converted by sampling pulse generating circuit 12 into sampling pulses of the same cycles with the carrier and they are applied to sample holding circuit 13. Sample holding circuit 13 samples the level shift extent to output a staircase wave.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14604779A JPS5669905A (en) | 1979-11-13 | 1979-11-13 | Fm demodulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14604779A JPS5669905A (en) | 1979-11-13 | 1979-11-13 | Fm demodulator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5669905A true JPS5669905A (en) | 1981-06-11 |
Family
ID=15398893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14604779A Pending JPS5669905A (en) | 1979-11-13 | 1979-11-13 | Fm demodulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5669905A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100412036B1 (en) * | 2003-04-04 | 2003-12-18 | Kwang Yong Kim | Oil-water separation tank |
-
1979
- 1979-11-13 JP JP14604779A patent/JPS5669905A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100412036B1 (en) * | 2003-04-04 | 2003-12-18 | Kwang Yong Kim | Oil-water separation tank |
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