FR2350657A1 - Circuit d'amplification et de polarisation de transducteur electromagnetique - Google Patents

Circuit d'amplification et de polarisation de transducteur electromagnetique

Info

Publication number
FR2350657A1
FR2350657A1 FR7709626A FR7709626A FR2350657A1 FR 2350657 A1 FR2350657 A1 FR 2350657A1 FR 7709626 A FR7709626 A FR 7709626A FR 7709626 A FR7709626 A FR 7709626A FR 2350657 A1 FR2350657 A1 FR 2350657A1
Authority
FR
France
Prior art keywords
electromagnetic transducer
polarization circuit
transducer amplification
amplification
polarization
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
FR7709626A
Other languages
English (en)
Other versions
FR2350657B1 (fr
Inventor
Jerome D Harr
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2350657A1 publication Critical patent/FR2350657A1/fr
Application granted granted Critical
Publication of FR2350657B1 publication Critical patent/FR2350657B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • 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
    • G11B5/03—Biasing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45928—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit
    • H03F3/45968—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction
    • H03F3/45973—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction by using a feedback circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45928—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit
    • H03F3/45968—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction
    • H03F3/45991—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction by using balancing means
FR7709626A 1976-05-06 1977-03-25 Circuit d'amplification et de polarisation de transducteur electromagnetique Granted FR2350657A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/684,053 US4050086A (en) 1976-05-06 1976-05-06 Dynamic transducer biasing signal amplifying circuitry

Publications (2)

Publication Number Publication Date
FR2350657A1 true FR2350657A1 (fr) 1977-12-02
FR2350657B1 FR2350657B1 (fr) 1979-05-11

Family

ID=24746515

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7709626A Granted FR2350657A1 (fr) 1976-05-06 1977-03-25 Circuit d'amplification et de polarisation de transducteur electromagnetique

Country Status (7)

Country Link
US (1) US4050086A (fr)
JP (1) JPS5827561B2 (fr)
CA (1) CA1096036A (fr)
DE (1) DE2718491C2 (fr)
FR (1) FR2350657A1 (fr)
GB (1) GB1537603A (fr)
IT (1) IT1114782B (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7806568A (nl) * 1978-06-19 1979-12-21 Philips Nv Magnetoweerstand leeskop.
US4191977A (en) * 1978-09-29 1980-03-04 International Business Machines Corporation Biasing of magnetoresistive read head using gyrators
GB2037474B (en) * 1978-12-11 1983-08-24 Racal Recorders Ltd Magneting recording and reproduction
US4343026A (en) * 1980-07-09 1982-08-03 Spin Physics, Inc. Magnetoresistive head employing field feedback
EP0053343A1 (fr) * 1980-11-28 1982-06-09 Hitachi, Ltd. Circuit de reproduction et d'amplification pour tête magnéto-résistive
JPS591111U (ja) * 1982-06-25 1984-01-06 ソニー株式会社 磁気再生回路
US4589041A (en) * 1982-08-30 1986-05-13 International Business Machines Corporation Differential magnetoresistive sensor for vertical recording
US4786993A (en) * 1986-06-30 1988-11-22 International Business Machines Corporation Voltage amplifier for constant voltage biasing and amplifying signals from a MR sensor
JPS63298801A (ja) * 1987-05-29 1988-12-06 Hitachi Ltd バイアス電圧制御回路
US5204789A (en) * 1991-01-31 1993-04-20 International Business Machines Corporation Low noise voltage-biasing amplifier for magnetoresistive element
US5309295A (en) * 1992-10-08 1994-05-03 International Business Machines Corporation Method and apparatus for biasing a magneto-resistive head
US5301080A (en) * 1992-12-31 1994-04-05 International Business Machines Corporation Bias servo loop for magneto-resistive read/write head
US5390054A (en) * 1993-03-12 1995-02-14 Minnesota Mining And Manufacturing Company Method and system for minimizing the error rate of a digital recording system by predicting the optimal bias current
US5532631A (en) * 1994-11-17 1996-07-02 Vtc Inc. Active pull-down write driver for three-terminal inductive load
US5877911A (en) * 1996-03-13 1999-03-02 International Business Machines Corporation Magneto-resistive head pre-amplifying circuit for avoiding output voltage transients
US5914630A (en) * 1996-05-10 1999-06-22 Vtc Inc. MR head preamplifier with output signal amplitude which is independent of head resistance
US5986839A (en) * 1996-09-17 1999-11-16 International Business Machines Corporation Electronic magnetoresistive sensor biasing using a transducer equivalent circuit and current sources
KR100562146B1 (ko) 1998-03-04 2006-05-25 삼성전자주식회사 엠.알-바이어스 전류 최적화방법
US6882218B2 (en) * 2002-08-26 2005-04-19 Broadcom Corporation Transimpedance amplifier and offset correction mechanism and method for lowering noise
EP1993203A1 (fr) * 2007-05-18 2008-11-19 Stmicroelectronics SA Système de contrôle d'overdrive
US20190294295A1 (en) * 2018-03-20 2019-09-26 Qualcomm Incorporated Apparatus and method for reducing amplifier feedback capacitor with bypass amplification stage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA643108A (en) * 1962-06-19 Kindl Friedrich Dictation apparatus
US3852813A (en) * 1970-06-08 1974-12-03 Polaroid Corp Method and circuit for recording audio signals on magnetic tape
US3806828A (en) * 1973-07-26 1974-04-23 Cetec Inc Combined high-frequency bias generator and amplifier for recording systems
US3979775A (en) * 1975-09-08 1976-09-07 International Business Machines Corporation Magnetoresistive multitransducer assembly with compensation elements for thermal drift and bias balancing
JPS5611224Y2 (fr) * 1976-01-21 1981-03-13

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, VOLUME 17, NO. 11, AVRIL 1975, YORKTOWN HEIGHTS USA LIN ET VALSTIJN "RESISTANCE MATCHING FOR COUPLED-FILM MAGNETORESISTIVE ELEMENTS" PAGE 3437) *

Also Published As

Publication number Publication date
DE2718491A1 (de) 1977-11-24
FR2350657B1 (fr) 1979-05-11
CA1096036A (fr) 1981-02-17
JPS52135706A (en) 1977-11-14
DE2718491C2 (de) 1983-11-10
IT1114782B (it) 1986-01-27
GB1537603A (en) 1979-01-04
US4050086A (en) 1977-09-20
JPS5827561B2 (ja) 1983-06-10

Similar Documents

Publication Publication Date Title
FR2350657A1 (fr) Circuit d'amplification et de polarisation de transducteur electromagnetique
JPS533135A (en) Sensitive amplifier latch circuit
NL7903430A (nl) Opneem- en/of weergeefapparaat.
NL189735C (nl) Magnetische opneem- en/of weergeefinrichting.
DK324777A (da) 15-deoxy-16-hydroxy-16-substituerede prostansyrer og beslagtede forbindelser
NL172895C (nl) Magnetische opneem- en/of weergeefinrichting.
BE886850A (fr) Transducteur magnetique
IT1062889B (it) Rele'elettromagnetico polarizzato e procedimento per la sua fabbricazione
NO149596C (no) Lyd- og svingningsisolerende festeelement
IT1095831B (it) Rele'miniature elettromagnetico polarizzato
NL7903431A (nl) Opneem- en/of weergeefapparaat.
NL7902791A (nl) Magnetische signaalweergeefinrichting.
NL7904377A (nl) Opneem- en/of weergeefapparaat.
DK581977A (da) Magnetisk transducer
FR2321801A1 (fr) Circuit d'amplification
NL7904604A (nl) Magnetische registratie- en weergeefinrichting.
FR2302625A1 (fr) Circuit d'amplification
FR2342376A1 (fr) Circuit d'ecoulemen
BE887857A (fr) Circuit d'amplification
GB2031639B (en) Bias arrangements in magnetic recorders
BR7808612A (pt) Transdutor magnetico
BE884895A (fr) Dispositifs pourvus d'un circuit magnetique
JPS54115030A (en) Bias magnetic field device
TR19842A (tr) Guenes isini panosu ve imaline mahsus usul
SE8003419L (sv) Forsterkare i linjekrets

Legal Events

Date Code Title Description
ST Notification of lapse