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 conditions

Info

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
Application number
FR7829683A
Other languages
French (fr)
Other versions
FR2439505B1 (en
Inventor
Alain Roi
Guy Huquet
Daniel Paillot
Jean-Yves Minard
Jean Amouroux
Andre Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telediffusion de France ets Public de Diffusion
Original Assignee
Telediffusion de France ets Public de Diffusion
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telediffusion de France ets Public de Diffusion filed Critical Telediffusion de France ets Public de Diffusion
Priority to FR7829683A priority Critical patent/FR2439505A1/en
Publication of FR2439505A1 publication Critical patent/FR2439505A1/en
Application granted granted Critical
Publication of FR2439505B1 publication Critical patent/FR2439505B1/fr
Granted legal-status Critical Current

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.
FR7829683A 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 Granted FR2439505A1 (en)

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)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EXBK/66 *
EXBK/72 *

Cited By (11)

* Cited by examiner, † Cited by third party
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