FR2439505A1 - Stereophonic signal phase detector - has two amplifier and integrating channels which provide power to LED display for in-phase and in-opposition conditions - Google Patents
Stereophonic signal phase detector - has two amplifier and integrating channels which provide power to LED display for in-phase and in-opposition conditionsInfo
- Publication number
- FR2439505A1 FR2439505A1 FR7829683A FR7829683A FR2439505A1 FR 2439505 A1 FR2439505 A1 FR 2439505A1 FR 7829683 A FR7829683 A FR 7829683A FR 7829683 A FR7829683 A FR 7829683A FR 2439505 A1 FR2439505 A1 FR 2439505A1
- Authority
- FR
- France
- Prior art keywords
- phase
- circuit
- amplifier
- opposition
- conditions
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/40—Visual indication of stereophonic sound image
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
The phase detection method is esp. for stereophonic signals. The detector provides an output indicating in phase or in opposition conditions for complex signals, i.e. signals having a wide range of frequency and amplitude components. The two input channels (C1, C2) are coupled into the circuit by a pair of transformers each having twin secondaries (21, 22, 31, 32) one transformer only having a connection sense reversal switch (1). The secondaries feed two operational amplifiers and integration chains (4-7). One amplifier acts as an addition circuit and the second a subtraction, their outputs being integrated in an RC circuit which includes a detection diode (61, 71). Teh interated outputs are compared in a further resistive feedback operational amplifier (80) with a back to back diode (86) pair input circuit. The comparator output directly feeds an LED pair (90, 91) indicating IN or OPPOSITION phase conditions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7829683A FR2439505A1 (en) | 1978-10-18 | 1978-10-18 | Stereophonic signal phase detector - has two amplifier and integrating channels which provide power to LED display for in-phase and in-opposition conditions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7829683A FR2439505A1 (en) | 1978-10-18 | 1978-10-18 | Stereophonic signal phase detector - has two amplifier and integrating channels which provide power to LED display for in-phase and in-opposition conditions |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2439505A1 true FR2439505A1 (en) | 1980-05-16 |
FR2439505B1 FR2439505B1 (en) | 1981-11-20 |
Family
ID=9213898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7829683A Granted FR2439505A1 (en) | 1978-10-18 | 1978-10-18 | Stereophonic signal phase detector - has two amplifier and integrating channels which provide power to LED display for in-phase and in-opposition conditions |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2439505A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0072101A1 (en) * | 1981-07-25 | 1983-02-16 | THORN EMI Ferguson Limited | Stereo indicating circuit |
EP0481821A2 (en) * | 1990-10-19 | 1992-04-22 | Leader Electronics Corp. | Method and apparatus for determining phase correlation of a stereophonic signal |
EP0485222A2 (en) * | 1990-11-09 | 1992-05-13 | Sony Corporation | Stereo monaural detection apparatus with differential and add components detection |
EP0517233A1 (en) * | 1991-06-06 | 1992-12-09 | Matsushita Electric Industrial Co., Ltd. | Music/voice discriminating apparatus |
GB2512101A (en) * | 2013-03-20 | 2014-09-24 | Tube Lines Ltd | Loop break detection and repair |
-
1978
- 1978-10-18 FR FR7829683A patent/FR2439505A1/en active Granted
Non-Patent Citations (2)
Title |
---|
EXBK/66 * |
EXBK/72 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0072101A1 (en) * | 1981-07-25 | 1983-02-16 | THORN EMI Ferguson Limited | Stereo indicating circuit |
US4455673A (en) * | 1981-07-25 | 1984-06-19 | Thorn Emi Ferguson Limited | Stereo indicating circuit |
EP0481821A2 (en) * | 1990-10-19 | 1992-04-22 | Leader Electronics Corp. | Method and apparatus for determining phase correlation of a stereophonic signal |
EP0481821A3 (en) * | 1990-10-19 | 1993-03-31 | Leader Electronics Corp. | Method and apparatus for determining phase correlation of a stereophonic signal |
US5272756A (en) * | 1990-10-19 | 1993-12-21 | Leader Electronics Corp. | Method and apparatus for determining phase correlation of a stereophonic signal |
EP0485222A2 (en) * | 1990-11-09 | 1992-05-13 | Sony Corporation | Stereo monaural detection apparatus with differential and add components detection |
EP0485222A3 (en) * | 1990-11-09 | 1992-06-24 | Sony Corporation | Stereo monaural detection apparatus with differential and add components detection |
US5210796A (en) * | 1990-11-09 | 1993-05-11 | Sony Corporation | Stereo/monaural detection apparatus |
EP0517233A1 (en) * | 1991-06-06 | 1992-12-09 | Matsushita Electric Industrial Co., Ltd. | Music/voice discriminating apparatus |
US5375188A (en) * | 1991-06-06 | 1994-12-20 | Matsushita Electric Industrial Co., Ltd. | Music/voice discriminating apparatus |
GB2512101A (en) * | 2013-03-20 | 2014-09-24 | Tube Lines Ltd | Loop break detection and repair |
Also Published As
Publication number | Publication date |
---|---|
FR2439505B1 (en) | 1981-11-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |