JPS573269A - Demodulating circuit for position signal - Google Patents

Demodulating circuit for position signal

Info

Publication number
JPS573269A
JPS573269A JP7553980A JP7553980A JPS573269A JP S573269 A JPS573269 A JP S573269A JP 7553980 A JP7553980 A JP 7553980A JP 7553980 A JP7553980 A JP 7553980A JP S573269 A JPS573269 A JP S573269A
Authority
JP
Japan
Prior art keywords
circuit
position signal
signal
demodulated
signals
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
JP7553980A
Other languages
Japanese (ja)
Other versions
JPS6223389B2 (en
Inventor
Naoto Kamata
Takuji Ogawa
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7553980A priority Critical patent/JPS573269A/en
Publication of JPS573269A publication Critical patent/JPS573269A/en
Publication of JPS6223389B2 publication Critical patent/JPS6223389B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To perform highly precise head positioning by obtaining a noise-free position signal, by charging the discharging the holding capacitor of a sample holding circuit with a current controlled with a differential signal derived from a demodulated position signal. CONSTITUTION:In a sample holding circuit 1', transistors Q3 and Q4 controlling the discharge of holding capacitors C1 and C2 are controlled by signals A and B from a differentiating circuit 7 instead of a speed signal, and a Q5 and Q6 for supplying charging current controlled by signals C and D to the C1 and C2 are equipped. The circuit 7 performs the time differentiation of a position signal outputted from a differential amplifying circuit 2 to generate signals A-D. Consequently, saw-tooth components in rising periods of an odd signal and an even signal demodulated by circuit 1 are never superposed upon each other, and the demodulated position signal contains no noise.
JP7553980A 1980-06-06 1980-06-06 Demodulating circuit for position signal Granted JPS573269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7553980A JPS573269A (en) 1980-06-06 1980-06-06 Demodulating circuit for position signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7553980A JPS573269A (en) 1980-06-06 1980-06-06 Demodulating circuit for position signal

Publications (2)

Publication Number Publication Date
JPS573269A true JPS573269A (en) 1982-01-08
JPS6223389B2 JPS6223389B2 (en) 1987-05-22

Family

ID=13579104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7553980A Granted JPS573269A (en) 1980-06-06 1980-06-06 Demodulating circuit for position signal

Country Status (1)

Country Link
JP (1) JPS573269A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543347A1 (en) * 1983-03-23 1984-09-28 Xerox Corp TRACK TRACKING SYSTEM FOR OPTICAL DISC DRIVE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543347A1 (en) * 1983-03-23 1984-09-28 Xerox Corp TRACK TRACKING SYSTEM FOR OPTICAL DISC DRIVE

Also Published As

Publication number Publication date
JPS6223389B2 (en) 1987-05-22

Similar Documents

Publication Publication Date Title
GB2065395B (en) Frequency controlled signal generating circuit arrangements
HU911186D0 (en) Process for producing ammonium salts of n-methyl-5,6,7,8-tetrahydropholic acid, for separation of (6rs) diastereomer mixtures and for producing (6r)- and (6s)-alcaline metal and alcaline earth metal salts
YU12777A (en) Process for obtaining a concentrate of the stabilized enzyme glucose-isomerase
GB979865A (en) Improvements in or relating to pulse-counting detector circuits
MY8200032A (en) Amplitude limiting circuit for frequency modulated video signal
JPS53114612A (en) Compensating unit for color video signal defect
JPS573269A (en) Demodulating circuit for position signal
CH614525A5 (en) Circuit arrangement for linearising the output signals of sensors
JPS5425811A (en) Tape recorder
GB2029157B (en) Arrangement for increasing the amplitude of pulses in a video signal
CA1009313A (en) Electronic circuit for eliminating coincidental signal from hybrid signals
JPS53118927A (en) Video detecting unit
GB1056403A (en) Improvements in or relating to apparatus for reproducing speech signals
JPS526414A (en) Colour picture signal reproducer
JPS5237025A (en) Dropout compensation device
GB1329208A (en) Circuit arrangements for detecting zero passages of data signals
JPS54107214A (en) Aperture compensating circuit
JPS524124A (en) Phase synchronism process
JPS5758482A (en) Dropout compensation circuit
JPS5374347A (en) Amplifying device
JPS51143181A (en) Process controller
JPS5665534A (en) Receiver for car
JPS5753897A (en) Signal detecting circuit
JPS526055A (en) Differentiation circuit in an analog signal
JPS5717270A (en) Synchronizing separation circuit