JPS54118211A - Detection circuit of drop-out - Google Patents

Detection circuit of drop-out

Info

Publication number
JPS54118211A
JPS54118211A JP2513978A JP2513978A JPS54118211A JP S54118211 A JPS54118211 A JP S54118211A JP 2513978 A JP2513978 A JP 2513978A JP 2513978 A JP2513978 A JP 2513978A JP S54118211 A JPS54118211 A JP S54118211A
Authority
JP
Japan
Prior art keywords
signal
drop
multivibrator
period
detection circuit
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
JP2513978A
Other languages
Japanese (ja)
Inventor
Nobutomo Umeki
Hiroo Takahashi
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP2513978A priority Critical patent/JPS54118211A/en
Publication of JPS54118211A publication Critical patent/JPS54118211A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To obtain the detection signal of the drop-out of time-axis modulation signal by supplying the digitized time axis modulation signal to a monostable circuit.
CONSTITUTION: The FM signal Sb having undergone shaping is supplied to a monostable multivibrator 24 of rise trigger type. In this case, this multivibrator 24 is made in retriggerable type and its inversion period (r) is made longer than the 1-cycle period of the FM signal Sf when the maximum period is reached and shorter than the 1.5-cycle period. Hence, the monostable multivibrator 24 is triggered at each rising of the signal Sb and since its inversion period (r) has been selected, the output Q24 of the multivibrator 24 delays by nearly T/2 and becomes 0 when there is drop-out.
COPYRIGHT: (C)1979,JPO&Japio
JP2513978A 1978-03-06 1978-03-06 Detection circuit of drop-out Pending JPS54118211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2513978A JPS54118211A (en) 1978-03-06 1978-03-06 Detection circuit of drop-out

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2513978A JPS54118211A (en) 1978-03-06 1978-03-06 Detection circuit of drop-out

Publications (1)

Publication Number Publication Date
JPS54118211A true JPS54118211A (en) 1979-09-13

Family

ID=12157634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2513978A Pending JPS54118211A (en) 1978-03-06 1978-03-06 Detection circuit of drop-out

Country Status (1)

Country Link
JP (1) JPS54118211A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02221872A (en) * 1989-02-23 1990-09-04 Kenwood Corp Dropout counting circuit
JP2007062054A (en) * 2005-08-30 2007-03-15 Brother Ind Ltd Stamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02221872A (en) * 1989-02-23 1990-09-04 Kenwood Corp Dropout counting circuit
JP2506178B2 (en) * 1989-02-23 1996-06-12 株式会社ケンウッド Dropout measurement circuit
JP2007062054A (en) * 2005-08-30 2007-03-15 Brother Ind Ltd Stamp

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