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FR2345009A1 - Circuit de demodulation d'un signal module en largeur d'impulsion - Google Patents

Circuit de demodulation d'un signal module en largeur d'impulsion

Info

Publication number
FR2345009A1
FR2345009A1 FR7708255A FR7708255A FR2345009A1 FR 2345009 A1 FR2345009 A1 FR 2345009A1 FR 7708255 A FR7708255 A FR 7708255A FR 7708255 A FR7708255 A FR 7708255A FR 2345009 A1 FR2345009 A1 FR 2345009A1
Authority
FR
France
Prior art keywords
pulse width
demodulation circuit
module signal
width module
signal
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
FR7708255A
Other languages
English (en)
Other versions
FR2345009B1 (fr
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of FR2345009A1 publication Critical patent/FR2345009A1/fr
Application granted granted Critical
Publication of FR2345009B1 publication Critical patent/FR2345009B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/322—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier used signal is digitally coded
    • G11B27/323—Time code signal, e.g. on a cue track as SMPTE- or EBU-time code
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
FR7708255A 1976-03-18 1977-03-18 Circuit de demodulation d'un signal module en largeur d'impulsion Granted FR2345009A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2956776A JPS52112311A (en) 1976-03-18 1976-03-18 Demodulating circuit

Publications (2)

Publication Number Publication Date
FR2345009A1 true FR2345009A1 (fr) 1977-10-14
FR2345009B1 FR2345009B1 (fr) 1982-07-02

Family

ID=12279693

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7708255A Granted FR2345009A1 (fr) 1976-03-18 1977-03-18 Circuit de demodulation d'un signal module en largeur d'impulsion

Country Status (8)

Country Link
US (1) US4139870A (fr)
JP (1) JPS52112311A (fr)
AT (1) AT371300B (fr)
CA (1) CA1070826A (fr)
DE (1) DE2711452C2 (fr)
FR (1) FR2345009A1 (fr)
GB (1) GB1556779A (fr)
NL (1) NL7702927A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664034A5 (en) * 1984-02-14 1988-01-29 Studer Willi Ag Processing cueing or marking signal for audio recording system - converting analogue signals into pulse duration modulated signals prior to recording e.g. on magnetic tape
EP0304799A2 (fr) * 1987-08-27 1989-03-01 Deutsche Thomson-Brandt GmbH Dispositif pour démoduler un signal biphasé

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2432246A1 (fr) * 1978-07-26 1980-02-22 Cit Alcatel Procede et circuit de decodage d'un signal binaire code en cmi
JPS55146676A (en) * 1979-04-27 1980-11-15 Hitachi Ltd Setter for beginning of tape
US4260952A (en) * 1979-07-17 1981-04-07 Teletype Corporation Circuit for decoding a diphase signal
JPS5758269A (en) * 1980-09-24 1982-04-07 Sony Corp Device for reproducing disk
JPS57124954A (en) * 1981-01-26 1982-08-04 Victor Co Of Japan Ltd Data playback circuit
GB2117549A (en) * 1982-03-19 1983-10-12 Kegmatics Limited Security marking video tape recordings
US4462051A (en) * 1982-04-02 1984-07-24 Ampex Corporation Demodulator for an asynchronous binary signal
JPS59230354A (ja) * 1983-06-13 1984-12-24 Victor Co Of Japan Ltd パルス発生回路
US4663678A (en) * 1984-06-18 1987-05-05 Odetics, Inc. System for writing and reading digital data interspersed with analog audio frequency data on magnetic recording tape
JP3177637B2 (ja) * 1997-02-05 2001-06-18 広島大学長 パルス幅変調演算回路
EP0867882B1 (fr) 1997-03-27 2003-12-03 Victor Company Of Japan, Limited Appareil pour générer des signaux de code de temps
US6754026B1 (en) 1999-10-28 2004-06-22 International Business Machines Corporation Tape transport servo system and method for a computer tape drive
US7991080B2 (en) * 2006-07-20 2011-08-02 Broadcom Corporation RFID decoding subsystem with decode module
JP2009250807A (ja) * 2008-04-07 2009-10-29 Seiko Epson Corp 周波数測定装置及び測定方法
JP2010271091A (ja) * 2009-05-20 2010-12-02 Seiko Epson Corp 周波数測定装置
JP5440999B2 (ja) * 2009-05-22 2014-03-12 セイコーエプソン株式会社 周波数測定装置
JP5517033B2 (ja) * 2009-05-22 2014-06-11 セイコーエプソン株式会社 周波数測定装置
JP5582447B2 (ja) * 2009-08-27 2014-09-03 セイコーエプソン株式会社 電気回路、同電気回路を備えたセンサーシステム、及び同電気回路を備えたセンサーデバイス
JP5815918B2 (ja) * 2009-10-06 2015-11-17 セイコーエプソン株式会社 周波数測定方法、周波数測定装置及び周波数測定装置を備えた装置
JP5876975B2 (ja) * 2009-10-08 2016-03-02 セイコーエプソン株式会社 周波数測定装置及び周波数測定装置における変速分周信号の生成方法
JP5883558B2 (ja) 2010-08-31 2016-03-15 セイコーエプソン株式会社 周波数測定装置及び電子機器
US9843285B1 (en) * 2016-07-22 2017-12-12 Allegro Microsystems, Llc Digital demodulator for pulse-width modulated (PWM) signals in a motor controller

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947662A (en) * 1974-12-31 1976-03-30 International Business Machines Corporation Distorted two frequency coded data interpreting method and apparatus
US4040100A (en) * 1975-09-25 1977-08-02 Adams-Smith Incorporated Digital video tape frame code readout system
US4012786A (en) * 1976-02-05 1977-03-15 Trw Inc. Magnetic data decoder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664034A5 (en) * 1984-02-14 1988-01-29 Studer Willi Ag Processing cueing or marking signal for audio recording system - converting analogue signals into pulse duration modulated signals prior to recording e.g. on magnetic tape
EP0304799A2 (fr) * 1987-08-27 1989-03-01 Deutsche Thomson-Brandt GmbH Dispositif pour démoduler un signal biphasé
EP0304799A3 (en) * 1987-08-27 1990-06-20 Deutsche Thomson-Brandt Gmbh Method and/or apparatus for demodulating a biphase signal

Also Published As

Publication number Publication date
DE2711452A1 (de) 1977-09-29
NL7702927A (nl) 1977-09-20
FR2345009B1 (fr) 1982-07-02
ATA191677A (de) 1982-10-15
DE2711452C2 (de) 1984-08-23
GB1556779A (en) 1979-11-28
CA1070826A (fr) 1980-01-29
AT371300B (de) 1983-06-10
JPS52112311A (en) 1977-09-20
US4139870A (en) 1979-02-13

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Legal Events

Date Code Title Description
ST Notification of lapse