DE2534225A1 - Steuerschaltung fuer ein vier-kanal-matrix-tonfrequenz-wiedergabesystem - Google Patents
Steuerschaltung fuer ein vier-kanal-matrix-tonfrequenz-wiedergabesystemInfo
- Publication number
- DE2534225A1 DE2534225A1 DE19752534225 DE2534225A DE2534225A1 DE 2534225 A1 DE2534225 A1 DE 2534225A1 DE 19752534225 DE19752534225 DE 19752534225 DE 2534225 A DE2534225 A DE 2534225A DE 2534225 A1 DE2534225 A1 DE 2534225A1
- Authority
- DE
- Germany
- Prior art keywords
- transistor
- transistors
- control
- pair
- electrode
- 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
- 239000011159 matrix material Substances 0.000 title description 18
- 230000001133 acceleration Effects 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 10
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Algebra (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Power Engineering (AREA)
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
- Stereophonic System (AREA)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/503,833 US3937885A (en) | 1974-09-06 | 1974-09-06 | Control circuit for a matrixed four channel audio reproducing system |
| US05/561,468 US4021610A (en) | 1974-09-06 | 1975-03-24 | Control circuit for a matrixed four channel audio reproducing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2534225A1 true DE2534225A1 (de) | 1976-03-18 |
Family
ID=27054632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19752534225 Pending DE2534225A1 (de) | 1974-09-06 | 1975-07-31 | Steuerschaltung fuer ein vier-kanal-matrix-tonfrequenz-wiedergabesystem |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US3937885A (enExample) |
| JP (1) | JPS5153802A (enExample) |
| DE (1) | DE2534225A1 (enExample) |
| FR (1) | FR2284241A1 (enExample) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4063032A (en) * | 1976-03-16 | 1977-12-13 | John C. Bogue | Constant power balance controls for stereophonic and quadraphonic sound systems |
| US4113984A (en) * | 1976-09-17 | 1978-09-12 | General Motors Corporation | Voltage translating circuit for volume and balance control of a four-channel audio system |
| US4076959A (en) * | 1976-10-08 | 1978-02-28 | General Motors Corporation | Volume, tone and balance control for multi-channel audio systems |
| US6281749B1 (en) | 1997-06-17 | 2001-08-28 | Srs Labs, Inc. | Sound enhancement system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1286127B (de) * | 1967-05-10 | 1969-01-02 | Fernseh Gmbh | Schaltungsanordnung zur gleichlaufenden AEnderung der Verstaerkung mehrerer Verstaerker fuer elektrische Signale |
| US3451006A (en) * | 1967-05-29 | 1969-06-17 | Honeywell Inc | Variable gain amplifiers |
| US3573496A (en) * | 1968-11-19 | 1971-04-06 | Ibm | Dc sense amplifier |
| US3700811A (en) * | 1970-07-20 | 1972-10-24 | Motorola Inc | Tone and volume control for a multi-channel audio amplifier system |
| US3725583A (en) * | 1970-07-20 | 1973-04-03 | Motorola Inc | Volume and tone control for multi-channel audio systems |
| US3702901A (en) * | 1970-12-22 | 1972-11-14 | Motorola Inc | Volume, balance and fader control for four channel sound system |
| US3821471A (en) * | 1971-03-15 | 1974-06-28 | Cbs Inc | Apparatus for reproducing quadraphonic sound |
| US3798373A (en) * | 1971-06-23 | 1974-03-19 | Columbia Broadcasting Syst Inc | Apparatus for reproducing quadraphonic sound |
| US3794781A (en) * | 1971-09-01 | 1974-02-26 | Columbia Broadcasting Syst Inc | Four channel decoder with improved gain control |
| GB1402320A (en) * | 1971-10-25 | 1975-08-06 | Sansui Electric Co | Decoder for use in 4-2-4 matrix playback system |
| US3875334A (en) * | 1973-06-19 | 1975-04-01 | Motorola Inc | Multi-channel control circuit with D-C operated control devices |
| US3849601A (en) * | 1973-10-09 | 1974-11-19 | Motorola Inc | Volume and tone controls for multichannel audio systems |
-
1974
- 1974-09-06 US US05/503,833 patent/US3937885A/en not_active Expired - Lifetime
-
1975
- 1975-03-24 US US05/561,468 patent/US4021610A/en not_active Expired - Lifetime
- 1975-07-31 DE DE19752534225 patent/DE2534225A1/de active Pending
- 1975-09-05 JP JP50107920A patent/JPS5153802A/ja active Pending
- 1975-09-08 FR FR7527502A patent/FR2284241A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2284241A1 (fr) | 1976-04-02 |
| US3937885A (en) | 1976-02-10 |
| FR2284241B3 (enExample) | 1976-10-22 |
| JPS5153802A (enExample) | 1976-05-12 |
| US4021610A (en) | 1977-05-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHJ | Non-payment of the annual fee |