JPS54118211A - Detection circuit of drop-out - Google Patents
Detection circuit of drop-outInfo
- 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
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
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)
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 |
-
1978
- 1978-03-06 JP JP2513978A patent/JPS54118211A/en active Pending
Cited By (3)
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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