JPS5730111A - Agc system - Google Patents

Agc system

Info

Publication number
JPS5730111A
JPS5730111A JP10349880A JP10349880A JPS5730111A JP S5730111 A JPS5730111 A JP S5730111A JP 10349880 A JP10349880 A JP 10349880A JP 10349880 A JP10349880 A JP 10349880A JP S5730111 A JPS5730111 A JP S5730111A
Authority
JP
Japan
Prior art keywords
disk
agc
squelch
circuit
clamping voltage
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
JP10349880A
Other languages
Japanese (ja)
Inventor
Teiji Yoshida
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 JP10349880A priority Critical patent/JPS5730111A/en
Publication of JPS5730111A publication Critical patent/JPS5730111A/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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks

Abstract

PURPOSE:To stabilize transient response by an AGC circuit for a reproduced signal varying in level according to the radius-directional position on a magnetic disk, by varying a clamping voltage for an AGC control voltage according to the reproduction position of the disk. CONSTITUTION:The output signal of a main amplifier 5 is inputted to a VAGC generating circuit 10 and compared with a clamping voltage VR to be clamped up to a constant value, and when it exceeds the constant value, an AGC control voltageAGC is outputted to an AGC amplifier 4. When a squelch signal is inputted to set an initial squelch period, the AGC control voltage AAGC is fixed at a constant level during the squelch period and on the squelching operation, a transient response is made. A circuit 14 consisting of resistances RN... and gates GN... is provided correspondig cylinder addresses sectioned according to the position on a disk, and the clamping voltage VR is varied according to the position on the disk.
JP10349880A 1980-07-28 1980-07-28 Agc system Pending JPS5730111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10349880A JPS5730111A (en) 1980-07-28 1980-07-28 Agc system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10349880A JPS5730111A (en) 1980-07-28 1980-07-28 Agc system

Publications (1)

Publication Number Publication Date
JPS5730111A true JPS5730111A (en) 1982-02-18

Family

ID=14355646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10349880A Pending JPS5730111A (en) 1980-07-28 1980-07-28 Agc system

Country Status (1)

Country Link
JP (1) JPS5730111A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5395941A (en) * 1993-03-26 1995-03-07 Mercian Corporation Optically active 1,4-hydropyridine compounds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5395941A (en) * 1993-03-26 1995-03-07 Mercian Corporation Optically active 1,4-hydropyridine compounds

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