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FR2376582A1 - Circuits detecteurs de signal du type a canal double - Google Patents

Circuits detecteurs de signal du type a canal double

Info

Publication number
FR2376582A1
FR2376582A1 FR7738268A FR7738268A FR2376582A1 FR 2376582 A1 FR2376582 A1 FR 2376582A1 FR 7738268 A FR7738268 A FR 7738268A FR 7738268 A FR7738268 A FR 7738268A FR 2376582 A1 FR2376582 A1 FR 2376582A1
Authority
FR
France
Prior art keywords
detection
signal
signal detector
channel type
type 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
FR7738268A
Other languages
English (en)
Other versions
FR2376582B1 (fr
Inventor
Robert Price
George Victor Jacoby
Arthur Philip Geffon
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.)
Unisys Corp
Original Assignee
Sperry Rand 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 Sperry Rand Corp filed Critical Sperry Rand Corp
Publication of FR2376582A1 publication Critical patent/FR2376582A1/fr
Application granted granted Critical
Publication of FR2376582B1 publication Critical patent/FR2376582B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10212—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter compensation for data shift, e.g. pulse-crowding effects
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/035—Equalising
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/153—Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant
    • H03K5/1532—Peak detectors

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

Ce circuit détecteur de signal à canal double comprend un égalisateur qui réagit à un signal d'entrée à amplitude de crêtes variable, dans lequel les crêtes sont représentatives de données, de manière à fournir un signal de sortie à amplitude de crêtes pratiquement constante comportant des impulsions représentatives de données séparées à distance les unes des autres le long d'une ligne zéro, signal qui est pratiquement aplati au niveau zéro dans les régions intermédiaires entre les impulsions, en vue de son application à ces canaux séparés de détection de crêtes et de détection d'amplitude. L'invention est applicable à différents domaines de détection des signaux et en particulier à des systèmes de lecture de données magnétiques numériques.
FR7738268A 1976-12-30 1977-12-19 Circuits detecteurs de signal du type a canal double Expired FR2376582B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/755,875 US4081756A (en) 1976-12-30 1976-12-30 Dual channel signal detector circuit

Publications (2)

Publication Number Publication Date
FR2376582A1 true FR2376582A1 (fr) 1978-07-28
FR2376582B1 FR2376582B1 (fr) 1985-06-28

Family

ID=25041036

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738268A Expired FR2376582B1 (fr) 1976-12-30 1977-12-19 Circuits detecteurs de signal du type a canal double

Country Status (10)

Country Link
US (1) US4081756A (fr)
JP (1) JPS53107807A (fr)
CA (1) CA1097750A (fr)
CH (1) CH628455A5 (fr)
DE (1) DE2756740C2 (fr)
ES (1) ES465416A1 (fr)
FR (1) FR2376582B1 (fr)
GB (1) GB1590746A (fr)
IT (1) IT1143798B (fr)
SE (1) SE416853B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969841A (en) * 1989-03-29 1990-11-13 Yazaki Corporation Double locking structure for terminal in electrical connectors

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276573A (en) * 1979-06-29 1981-06-30 Datapoint Corporation Pulse shaping network for disc read circuitry
US4323932A (en) * 1979-07-30 1982-04-06 Sperry Corporation Readback pulse compensator
ZA805184B (en) * 1979-08-31 1981-08-26 Int Computers Ltd Magnetic recording systems
US4264935A (en) * 1980-04-09 1981-04-28 Sperry Corporation Balanced tapped delay line spectral shaping differentiation circuit for signal detection
US4319288A (en) * 1980-04-09 1982-03-09 Sperry Corporation Current injection tapped delay line spectral shaping equalizer and differentiator
US4327383A (en) * 1980-09-26 1982-04-27 Siemens Corporation Read circuit for a floppy disk drive
US4453255A (en) * 1981-02-05 1984-06-05 Victor Company Of Japan, Ltd. Characteristic control system for a digital equalizer
US4346411A (en) * 1981-02-17 1982-08-24 International Business Machines Corporation Amplitude sensitive three-level detector for derivative read back channel of magnetic storage device
US4468787A (en) * 1981-11-09 1984-08-28 Lear Siegler, Inc. Ternary data transmission system
US4561027A (en) * 1982-11-29 1985-12-24 Rca Corporation Rotating D.C. coupled record amplifier for digital magnetic recording
EP0110105B1 (fr) * 1982-12-01 1987-03-18 International Business Machines Corporation Systèmes pour la lecture d'enregistrements magnétiques
US4517610A (en) * 1982-12-09 1985-05-14 Magnetic Peripherals Inc. Multichannel signal recovery circuit
US4626933A (en) * 1983-08-18 1986-12-02 Amcodyne Incorporated Method and apparatus for qualifying data
US4531165A (en) * 1983-09-30 1985-07-23 International Business Machines Corporation Automatic amplitude equalizer based upon monitoring of channel power loss
US4580176A (en) * 1983-11-21 1986-04-01 International Business Machines Corporation Adaptive equalization circuit for magnetic recording channels utilizing signal timing
JPH0775107B2 (ja) * 1986-07-25 1995-08-09 株式会社日立製作所 磁気記録装置の信号再生回路
USRE36671E (en) * 1987-02-06 2000-04-25 Seagate Technology, Inc. Dual channel readback recovery system
US4760472A (en) * 1987-02-06 1988-07-26 Magnetic Peripherals Inc. Dual channel readback recovery system
US4789838A (en) * 1987-03-23 1988-12-06 Cheng Jyi Min Pulse detection circuit using amplitude and time qualification
US4771188A (en) * 1987-03-23 1988-09-13 Cheng Jyi Min Adaptive threshold adjustment method and apparatus
US4916556A (en) * 1987-05-28 1990-04-10 Apple Computer, Inc. Disk drive controller
US5068753A (en) * 1988-03-16 1991-11-26 Fujitsu Limited Data reproducing circuit for memory system having an equalizer generating two different equalizing signals used for data reproduction
US5120985A (en) * 1989-01-31 1992-06-09 Fujitsu Limited Data reproducing circuit for correcting amplitude variation and peak shift
EP0390724B1 (fr) * 1989-03-31 1995-10-04 Fujitsu Limited Circuit d'enregistrement et de reproduction de données
US5032934A (en) * 1989-08-18 1991-07-16 Teac Corporation Magnetic disc apparatus with a cosine equalizer and specific gap length head
JPH03102677A (ja) * 1989-09-14 1991-04-30 Sharp Corp 情報再生装置
JP2767960B2 (ja) * 1990-02-28 1998-06-25 松下電器産業株式会社 記録媒体の検査方法および検査装置ならびに記録再生装置の検査方法
US5270874A (en) * 1991-02-14 1993-12-14 International Business Machines Corporation Dropout simulation in a magnetic tape subsystem
US5367535A (en) * 1992-02-21 1994-11-22 Deutsche Thomson-Brandt Gmbh Method and circuit for regenerating a binary bit stream from a ternary signal
JP2948016B2 (ja) * 1992-03-19 1999-09-13 株式会社日立製作所 情報記録再生方法
US5550683A (en) * 1992-12-11 1996-08-27 Eastman Kodak Company Magnetic recording channel employing a non-ideal d.c.-free equalizer and a d.c.-free modulation code
US5424881A (en) * 1993-02-01 1995-06-13 Cirrus Logic, Inc. Synchronous read channel
US5519548A (en) * 1993-03-31 1996-05-21 Hewlett-Packard Company Using read channel noise to initialize read channel for head position calibration in a magnetic data storage device
JP3460034B2 (ja) 1995-04-03 2003-10-27 富士通株式会社 ブースト型等化回路
WO2003058860A2 (fr) * 2001-12-31 2003-07-17 Bae Systems Information And Electronic Systems Integration Inc. Procedes et appareils de detection de cretes entre plusieurs signaux

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1561522A (fr) * 1967-03-09 1969-03-28
FR2080453A5 (fr) * 1970-02-24 1971-11-12 Ibm
US3775759A (en) * 1972-01-21 1973-11-27 Ibm Magnetic recording and readback systems with raised cosine equalization
US3864734A (en) * 1973-01-05 1975-02-04 Bell & Howell Co Pulse-code modulation detector and equalizer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3524994A (en) * 1967-08-21 1970-08-18 Control Data Corp Signal recovering apparatus
US3516066A (en) * 1968-03-15 1970-06-02 Rca Corp Readback circuit for information storage systems
US3631263A (en) * 1970-01-09 1971-12-28 Ibm Signal detection circuit
US3760282A (en) * 1972-03-29 1973-09-18 Ibm Data recovery system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1561522A (fr) * 1967-03-09 1969-03-28
FR2080453A5 (fr) * 1970-02-24 1971-11-12 Ibm
US3775759A (en) * 1972-01-21 1973-11-27 Ibm Magnetic recording and readback systems with raised cosine equalization
US3864734A (en) * 1973-01-05 1975-02-04 Bell & Howell Co Pulse-code modulation detector and equalizer

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
EXBK/68 *
EXBK/70 *
EXBK/76 *
EXBK/77 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969841A (en) * 1989-03-29 1990-11-13 Yazaki Corporation Double locking structure for terminal in electrical connectors

Also Published As

Publication number Publication date
FR2376582B1 (fr) 1985-06-28
GB1590746A (en) 1981-06-10
SE416853B (sv) 1981-02-09
SE7714921L (sv) 1978-07-01
JPS53107807A (en) 1978-09-20
US4081756A (en) 1978-03-28
JPS6228503B2 (fr) 1987-06-20
ES465416A1 (es) 1978-09-16
DE2756740A1 (de) 1978-07-06
DE2756740C2 (de) 1983-11-03
CA1097750A (fr) 1981-03-17
CH628455A5 (de) 1982-02-26
IT1143798B (it) 1986-10-22

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Legal Events

Date Code Title Description
ST Notification of lapse