JPS4991201A - - Google Patents
Info
- Publication number
- JPS4991201A JPS4991201A JP48001541A JP154173A JPS4991201A JP S4991201 A JPS4991201 A JP S4991201A JP 48001541 A JP48001541 A JP 48001541A JP 154173 A JP154173 A JP 154173A JP S4991201 A JPS4991201 A JP S4991201A
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
- H04H20/88—Stereophonic broadcast systems
- H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Stereophonic System (AREA)
- Stereo-Broadcasting Methods (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP731541A JPS5243683B2 (US07922777-20110412-C00004.png) | 1972-12-29 | 1972-12-29 | |
| DE2365049A DE2365049A1 (de) | 1972-12-29 | 1973-12-28 | Demodulationsanordnung fuer winkelmodulierte signale, die von einer mehrkanalschallplatte aufgenommen werden |
| US429114A US3911232A (en) | 1972-12-29 | 1973-12-28 | Demodulation system for angle-modulated wave picked up from a multi-channel record disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP731541A JPS5243683B2 (US07922777-20110412-C00004.png) | 1972-12-29 | 1972-12-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4991201A true JPS4991201A (US07922777-20110412-C00004.png) | 1974-08-31 |
| JPS5243683B2 JPS5243683B2 (US07922777-20110412-C00004.png) | 1977-11-01 |
Family
ID=11504371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP731541A Expired JPS5243683B2 (US07922777-20110412-C00004.png) | 1972-12-29 | 1972-12-29 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3911232A (US07922777-20110412-C00004.png) |
| JP (1) | JPS5243683B2 (US07922777-20110412-C00004.png) |
| DE (1) | DE2365049A1 (US07922777-20110412-C00004.png) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL162812C (nl) * | 1974-03-12 | 1980-06-16 | Matsushita Electric Ind Co Ltd | Vierkanalige weergeefinrichting voor het weergeven van grammofoonplaten. |
| US4096360A (en) * | 1975-09-27 | 1978-06-20 | Victor Company Of Japan, Ltd. | Multichannel record disc reproducing system |
| US4152550A (en) * | 1976-10-21 | 1979-05-01 | Victor Company Of Japan, Ltd. | Apparatus for reproducing a multichannel record disc |
| JPS5793704A (en) * | 1980-12-03 | 1982-06-10 | Alps Electric Co Ltd | Fm demodulation circuit |
| JPS6225446U (US07922777-20110412-C00004.png) * | 1985-07-29 | 1987-02-16 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3564434A (en) * | 1968-07-29 | 1971-02-16 | Signetics Corp | Integrated frequency selective circuit and demodulator including phase locked loop |
| CA938560A (en) * | 1969-11-28 | 1973-12-18 | Victor Company Of Japan | System for recording and/or reproducing four channel signals on a record disc |
-
1972
- 1972-12-29 JP JP731541A patent/JPS5243683B2/ja not_active Expired
-
1973
- 1973-12-28 DE DE2365049A patent/DE2365049A1/de active Pending
- 1973-12-28 US US429114A patent/US3911232A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE2365049A1 (de) | 1974-07-11 |
| US3911232A (en) | 1975-10-07 |
| JPS5243683B2 (US07922777-20110412-C00004.png) | 1977-11-01 |
