JPS62146472A - Peak detecting circuit - Google Patents

Peak detecting circuit

Info

Publication number
JPS62146472A
JPS62146472A JP60288850A JP28885085A JPS62146472A JP S62146472 A JPS62146472 A JP S62146472A JP 60288850 A JP60288850 A JP 60288850A JP 28885085 A JP28885085 A JP 28885085A JP S62146472 A JPS62146472 A JP S62146472A
Authority
JP
Japan
Prior art keywords
signal
discharge current
peak
signals
holding
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
JP60288850A
Other languages
Japanese (ja)
Inventor
Yoichiro Taki
Original Assignee
Nec 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 Nec Corp filed Critical Nec Corp
Priority to JP60288850A priority Critical patent/JPS62146472A/en
Publication of JPS62146472A publication Critical patent/JPS62146472A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To eliminate a rectifier circuit for a speed signal and to reduce the cost of a magnetic disk device by using a discharge current control circuit for inputting a speed reference signal with single polarity.
CONSTITUTION: A servo signal 2 and the 1st and 2nd gate signals 3, 4 are inputted to a peak detecting circuit 8 for detecting the peak value of a servo signal for a magnetic head positioning mechanism, the signal 3 is activated near the odd dipulses 16, 18 of the signal 2 and the 1st peak holding signal 9 is generated. Similarly, the signal 4 is activated near even dipulses 17, 19 and the 2nd peak holding signal 10 is generated. The discharge current of a holding capacitor for holding the peak value stored in the detecting circuit 8 is controlled by the 1st and 2nd discharge current signals 6, 7 outputted from the discharge current control circuit 5. When a speed reference signal 2 with single polarity is added to the control circuit 5, signals 6, 7 capable of determining the inclinations of signals 9, 10 are generated without using a rectifier circuit.
COPYRIGHT: (C)1987,JPO&Japio
JP60288850A 1985-12-20 1985-12-20 Peak detecting circuit Pending JPS62146472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60288850A JPS62146472A (en) 1985-12-20 1985-12-20 Peak detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60288850A JPS62146472A (en) 1985-12-20 1985-12-20 Peak detecting circuit

Publications (1)

Publication Number Publication Date
JPS62146472A true JPS62146472A (en) 1987-06-30

Family

ID=17735552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60288850A Pending JPS62146472A (en) 1985-12-20 1985-12-20 Peak detecting circuit

Country Status (1)

Country Link
JP (1) JPS62146472A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04302525A (en) * 1991-03-29 1992-10-26 Sharp Corp Pulse demodulating circuit
US5625508A (en) * 1993-08-26 1997-04-29 International Business Machines Corporation Method and apparatus for servo demodulation in a direct access storage device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04302525A (en) * 1991-03-29 1992-10-26 Sharp Corp Pulse demodulating circuit
US5625508A (en) * 1993-08-26 1997-04-29 International Business Machines Corporation Method and apparatus for servo demodulation in a direct access storage device

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