JPS6441395A - Time base error signal generator for information recording and reproducing device - Google Patents

Time base error signal generator for information recording and reproducing device

Info

Publication number
JPS6441395A
JPS6441395A JP62196209A JP19620987A JPS6441395A JP S6441395 A JPS6441395 A JP S6441395A JP 62196209 A JP62196209 A JP 62196209A JP 19620987 A JP19620987 A JP 19620987A JP S6441395 A JPS6441395 A JP S6441395A
Authority
JP
Japan
Prior art keywords
error signal
time base
output
time
window comparator
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
JP62196209A
Other languages
Japanese (ja)
Other versions
JPH0732494B2 (en
Inventor
Atsushi Kaneko
Akio Nakajima
Junichi Ikoma
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 Image Information Systems Inc
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Video Engineering Co 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, Hitachi Video Engineering Co Ltd filed Critical Hitachi Ltd
Priority to JP62196209A priority Critical patent/JPH0732494B2/en
Publication of JPS6441395A publication Critical patent/JPS6441395A/en
Publication of JPH0732494B2 publication Critical patent/JPH0732494B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Television Signal Processing For Recording (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To reduce the disturbance of a time base by replacing an erroneous error signal caused at dropout or the like of a reproducing signal to a preceding error signal level closest to the level of a peculiar error signal and outputting the result into a time base error signal. CONSTITUTION:The range of reference voltages +VTH1, -VTH1 of a window comparator 5 is selected to be sufficiently smaller than +VTH2, -VTH2 generated from an error level at preceding 1H. That is, an output of the window comparator 5 with respect to an output B of a sample and hold circuit 1 at a time t1 goes to a low level to inhibit 1 sampling by the sample and hold circuit 2, the reference values +HTH2, -VTH2 of the window comparator 9 are unchanged to hold a voltage before a time t3. Thus, the state change in the output of the window comparator 9 at a time t2 is prevented and as the output of the switch circuit 3, the state of selecting the sample and hold circuit 1 is continued. Thus, the disturbance in the time base due to dropout or the like is prevented.
JP62196209A 1987-08-07 1987-08-07 Time axis error signal generator for information recording / reproducing apparatus Expired - Lifetime JPH0732494B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62196209A JPH0732494B2 (en) 1987-08-07 1987-08-07 Time axis error signal generator for information recording / reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62196209A JPH0732494B2 (en) 1987-08-07 1987-08-07 Time axis error signal generator for information recording / reproducing apparatus

Publications (2)

Publication Number Publication Date
JPS6441395A true JPS6441395A (en) 1989-02-13
JPH0732494B2 JPH0732494B2 (en) 1995-04-10

Family

ID=16354017

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62196209A Expired - Lifetime JPH0732494B2 (en) 1987-08-07 1987-08-07 Time axis error signal generator for information recording / reproducing apparatus

Country Status (1)

Country Link
JP (1) JPH0732494B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09266353A (en) * 1996-03-28 1997-10-07 Nec Corp Digital light power control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09266353A (en) * 1996-03-28 1997-10-07 Nec Corp Digital light power control circuit

Also Published As

Publication number Publication date
JPH0732494B2 (en) 1995-04-10

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