JPS5733415A - Automatic optimum equalization controlling system - Google Patents

Automatic optimum equalization controlling system

Info

Publication number
JPS5733415A
JPS5733415A JP10549580A JP10549580A JPS5733415A JP S5733415 A JPS5733415 A JP S5733415A JP 10549580 A JP10549580 A JP 10549580A JP 10549580 A JP10549580 A JP 10549580A JP S5733415 A JPS5733415 A JP S5733415A
Authority
JP
Japan
Prior art keywords
detector
output
equalizer
output waveform
section
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.)
Pending
Application number
JP10549580A
Other languages
Japanese (ja)
Inventor
Michio Matsuura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10549580A priority Critical patent/JPS5733415A/en
Publication of JPS5733415A publication Critical patent/JPS5733415A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Abstract

PURPOSE:To automatically control an equalizer to the optimum state, by extracting the optimum equalizing state based on the output waveform given from a magnetic recorder/reproducer and then extracting the nonoptimum equalizing state in contrast with the optimum equalizing state. CONSTITUTION:For the output waveform of an equalizer 3, the section of a small level of amplitude corresponds to the section of a large level of amplitude of the output waveform of an integrator 7. Thus the output of the integrator 7 is sliced by the threshold value through a threshold value detector 9. Then whether or not the output waveform of the equalizer 3 passes the zero level at the slicing section is checked by a zero level detector 10 and a rise detector 11. In other words, a switch 14 is controlled by an AND circuit 12 and via a timer 13 to the output of the detector 9 as well as the output of the detector 11. Then the equalizer 3 is controlled by the terminal voltage of a capacitor 6.
JP10549580A 1980-07-31 1980-07-31 Automatic optimum equalization controlling system Pending JPS5733415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10549580A JPS5733415A (en) 1980-07-31 1980-07-31 Automatic optimum equalization controlling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10549580A JPS5733415A (en) 1980-07-31 1980-07-31 Automatic optimum equalization controlling system

Publications (1)

Publication Number Publication Date
JPS5733415A true JPS5733415A (en) 1982-02-23

Family

ID=14409173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10549580A Pending JPS5733415A (en) 1980-07-31 1980-07-31 Automatic optimum equalization controlling system

Country Status (1)

Country Link
JP (1) JPS5733415A (en)

Similar Documents

Publication Publication Date Title
JPS57113428A (en) Focus servo device
JPS5746306A (en) Aural signal muting circuit of magnetic recorder and reproducer
SE8009085L (en) DATA DETECTION CIRCUIT FOR A TASI SYSTEM
JPS5733415A (en) Automatic optimum equalization controlling system
JPS5567915A (en) Optimum recording characteristic detecting method of magnetic recording and reproducing device
JPS56115023A (en) Automatic threshold level controlling circuit
JPS55101114A (en) Magnetic recording and reproducing device
JPS56102108A (en) Automatic gain controller
JPS5613880A (en) Automatic tracking device of variable speed reproduction
JPS5580810A (en) Magnetic recorder/reproducer
JPS5733416A (en) Automatic gain control processing system
JPS56115024A (en) Automatic threshold level setting circuit
JPS57140088A (en) Dropout compensating circuit in magnetic recording and reproducing device
JPS55130262A (en) Bipolarity discrimination circuit
JPS5548817A (en) Detection method of optimum recording bias for magnetic recording and reproducing unit
JPS56158511A (en) Automatic gain control circuit
JPS5514780A (en) Active filter
JPS56109012A (en) Automatic gain control circuit
JPS5529861A (en) Electrostatic recorder
JPS57129015A (en) Automatic waveform equalizing device
JPS5684013A (en) Automatic level regulator for sound signal
JPS5350702A (en) Automatic adjusting system for separation degree between before and behind
JPS5779772A (en) Fadar circuit
JPS5731224A (en) Magnetic recording and reproducing circuit
JPS56111110A (en) Automatic recording level setter