CA1024219A - Systeme demodulateur quadriphonique - Google Patents
Systeme demodulateur quadriphoniqueInfo
- Publication number
- CA1024219A CA1024219A CA182,156A CA182156A CA1024219A CA 1024219 A CA1024219 A CA 1024219A CA 182156 A CA182156 A CA 182156A CA 1024219 A CA1024219 A CA 1024219A
- Authority
- CA
- Canada
- Prior art keywords
- demodulating system
- channel stereophonic
- stereophonic demodulating
- channel
- stereophonic
- 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.)
- Expired
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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9851872A JPS5315602B2 (fr) | 1972-09-29 | 1972-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1024219A true CA1024219A (fr) | 1978-01-10 |
Family
ID=14221856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA182,156A Expired CA1024219A (fr) | 1972-09-29 | 1973-09-28 | Systeme demodulateur quadriphonique |
Country Status (7)
Country | Link |
---|---|
US (1) | US3909539A (fr) |
JP (1) | JPS5315602B2 (fr) |
CA (1) | CA1024219A (fr) |
DE (1) | DE2348411C3 (fr) |
FR (1) | FR2201581B1 (fr) |
GB (1) | GB1401562A (fr) |
NL (1) | NL7313375A (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4061882A (en) * | 1976-08-13 | 1977-12-06 | Quadracast Systems, Inc. | Quadrature multiplying four-channel demodulator |
JPS6322930A (ja) * | 1986-07-16 | 1988-01-30 | Yutani Heavy Ind Ltd | 建設機械の油圧回路 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1149396B (de) * | 1961-12-02 | 1963-05-30 | Telefunken Patent | Empfangsschaltung fuer kompatible Rundfunk-Stereophonie |
US3308241A (en) * | 1963-01-23 | 1967-03-07 | Tokyo Shibaura Electric Co | Fm stereo demodulating device using a diode ring modulator switching circuit |
DE1200364B (de) * | 1963-09-05 | 1965-09-09 | Telefunken Patent | Schaltungsanordnung zur Gewinnung der beiden Lautsprechersignale auf der Empfangsseite bei der kompatiblen Rundfunk-Stereophonie nach dem Multiplexverfahren |
US3309464A (en) * | 1964-01-03 | 1967-03-14 | Philco Corp | Stereophonic receiver having crosstalk compensation means |
FR1484513A (fr) * | 1964-05-18 | 1967-09-28 | ||
US3479463A (en) * | 1967-03-28 | 1969-11-18 | Zenith Radio Corp | Wave signal receiver |
US3707603A (en) * | 1969-12-29 | 1972-12-26 | Rca Corp | Fm stereophonic receiver detection apparatus and disabling means |
CA1021852A (fr) * | 1970-02-25 | 1977-11-29 | Louis Dorren | Systeme fm gradriphonique compatible |
US3708623A (en) * | 1970-04-29 | 1973-01-02 | Quadracast Syst Inc | Compatible four channel fm system |
US3721766A (en) * | 1970-11-16 | 1973-03-20 | Motorola Inc | Frequency multiplying circuit utilizing time gates and switching signals of differing phases |
DE2264591A1 (de) * | 1971-04-15 | 1974-06-12 | Matsushita Electric Ind Co Ltd | Vierkanal-fm-empfaenger |
CA1030225A (fr) * | 1971-12-16 | 1978-04-25 | Tsuneo Ohkubo | Demodulateur quadriphonique |
-
1972
- 1972-09-29 JP JP9851872A patent/JPS5315602B2/ja not_active Expired
-
1973
- 1973-09-19 US US398849A patent/US3909539A/en not_active Expired - Lifetime
- 1973-09-20 GB GB4429073A patent/GB1401562A/en not_active Expired
- 1973-09-26 DE DE2348411A patent/DE2348411C3/de not_active Expired
- 1973-09-27 FR FR7334660A patent/FR2201581B1/fr not_active Expired
- 1973-09-28 NL NL7313375A patent/NL7313375A/xx unknown
- 1973-09-28 CA CA182,156A patent/CA1024219A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3909539A (en) | 1975-09-30 |
DE2348411B2 (de) | 1979-08-02 |
FR2201581A1 (fr) | 1974-04-26 |
GB1401562A (en) | 1975-07-16 |
DE2348411C3 (de) | 1980-04-03 |
DE2348411A1 (de) | 1974-04-18 |
FR2201581B1 (fr) | 1976-11-19 |
JPS4956503A (fr) | 1974-06-01 |
NL7313375A (fr) | 1974-04-02 |
JPS5315602B2 (fr) | 1978-05-26 |
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