JPS56138308A - Phase shift multiplication type fm demodulator - Google Patents
Phase shift multiplication type fm demodulatorInfo
- Publication number
- JPS56138308A JPS56138308A JP4034281A JP4034281A JPS56138308A JP S56138308 A JPS56138308 A JP S56138308A JP 4034281 A JP4034281 A JP 4034281A JP 4034281 A JP4034281 A JP 4034281A JP S56138308 A JPS56138308 A JP S56138308A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- fed
- demodulated output
- resonance
- 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
- H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
- H03D3/22—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of active elements with more than two electrodes to which two signals are applied derived from the signal to be demodulated and having a phase difference related to the frequency deviation, e.g. phase detector
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuits Of Receivers In General (AREA)
- Stereo-Broadcasting Methods (AREA)
Abstract
PURPOSE:To enable circuit integration, by taking the applied reference voltage across the resistor appeared at the resonance circuit converting the frequency of resonance FM signal as the reference power supply of the gate circuit, suppressing the demodulated output and decreasing the number of pins through suitable change of the demodulated output. CONSTITUTION:The FM signal fed to the input terminal 1 is switched at the 1st and 2nd switching circuits 31, 33, to flow the current I37 of the constant current source circuit 37 while the signal is present to the diodes 361, 362 provided at the output stage of the circuit 33 and to flow the signal with pulse width in rsponse to the phase difference of signal to the diodes 361, 362. This signal is detected at the subtraction circuit 34 and fed to the filter 4. The IF signal introduced to the terminal 13 of the integrated circuit 100 with this constitution, is fed to the phase shift coil 321 for phase conversion with the signal in the resonance circuit 332, and it is fed from the terminal 14 as the reference voltage of the circuit 33. Further, the dispersion in the demodulated output is suppressed so that the demodulated output can suitably be changed, allowing to decrease the number of terminals connected and to make easy the circuit integration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4034281A JPS56138308A (en) | 1981-03-23 | 1981-03-23 | Phase shift multiplication type fm demodulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4034281A JPS56138308A (en) | 1981-03-23 | 1981-03-23 | Phase shift multiplication type fm demodulator |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP410776A Division JPS5287963A (en) | 1976-01-19 | 1976-01-19 | Phase shift multiplication type fm demodulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56138308A true JPS56138308A (en) | 1981-10-28 |
Family
ID=12577952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4034281A Pending JPS56138308A (en) | 1981-03-23 | 1981-03-23 | Phase shift multiplication type fm demodulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56138308A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60257608A (en) * | 1984-05-25 | 1985-12-19 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Circuit disposition for reducing strain of fm orthogonal demodulator |
| JPS61276175A (en) * | 1985-05-30 | 1986-12-06 | Sony Corp | Error information checking device |
-
1981
- 1981-03-23 JP JP4034281A patent/JPS56138308A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60257608A (en) * | 1984-05-25 | 1985-12-19 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Circuit disposition for reducing strain of fm orthogonal demodulator |
| JPS61276175A (en) * | 1985-05-30 | 1986-12-06 | Sony Corp | Error information checking device |
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