JPS4888902A - - Google Patents
Info
- Publication number
- JPS4888902A JPS4888902A JP47018109A JP1810972A JPS4888902A JP S4888902 A JPS4888902 A JP S4888902A JP 47018109 A JP47018109 A JP 47018109A JP 1810972 A JP1810972 A JP 1810972A JP S4888902 A JPS4888902 A JP S4888902A
- Authority
- JP
- Japan
- 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
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/006—Systems employing more than two channels, e.g. quadraphonic in which a plurality of audio signals are transformed in a combination of audio signals and modulated signals, e.g. CD-4 systems
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- 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
- G11B20/00992—Circuits for stereophonic or quadraphonic recording or reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
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- 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
- H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
- H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
- H03D3/244—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop combined with means for obtaining automatic gain control
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Stereophonic System (AREA)
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1810972A JPS5535039B2 (en:Method) | 1972-02-23 | 1972-02-23 | |
| DK487572AA DK137153B (da) | 1971-10-05 | 1972-10-02 | Demodulationsanlæg for vinkelmodulerede bølger. |
| CA153,125A CA1002616A (en) | 1971-10-05 | 1972-10-03 | Angle modulated wave demodulation system |
| GB4553872A GB1410381A (en) | 1971-10-05 | 1972-10-03 | Angle modulated wave demodulation system |
| SE7212781A SE384431B (sv) | 1971-10-05 | 1972-10-04 | Demoduleringssystem for vinkelmodulerade vagor |
| DE2248769A DE2248769B2 (de) | 1971-10-05 | 1972-10-05 | Demodulatorschaltung für winkelmodulierte elektrische Schwingungen |
| NLAANVRAGE7213487,A NL175870C (nl) | 1971-10-05 | 1972-10-05 | Demodulatieschakeling met een fase-regelschakeling. |
| US05/502,531 US3983500A (en) | 1971-10-05 | 1974-09-03 | Angle modulated wave demodulation system |
| US05/698,191 US4107478A (en) | 1971-10-05 | 1976-06-21 | Angle modulated wave demodulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1810972A JPS5535039B2 (en:Method) | 1972-02-23 | 1972-02-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4888902A true JPS4888902A (en:Method) | 1973-11-21 |
| JPS5535039B2 JPS5535039B2 (en:Method) | 1980-09-11 |
Family
ID=11962436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1810972A Expired JPS5535039B2 (en:Method) | 1971-10-05 | 1972-02-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5535039B2 (en:Method) |
-
1972
- 1972-02-23 JP JP1810972A patent/JPS5535039B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5535039B2 (en:Method) | 1980-09-11 |