JPS5613505A - Dropout detecting circuit of reproducing device of recorded information - Google Patents
Dropout detecting circuit of reproducing device of recorded informationInfo
- Publication number
- JPS5613505A JPS5613505A JP8884979A JP8884979A JPS5613505A JP S5613505 A JPS5613505 A JP S5613505A JP 8884979 A JP8884979 A JP 8884979A JP 8884979 A JP8884979 A JP 8884979A JP S5613505 A JPS5613505 A JP S5613505A
- Authority
- JP
- Japan
- Prior art keywords
- clock
- signal
- fall
- type
- reproduced
- 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
Links
Landscapes
- Television Signal Processing For Recording (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To attain dropout detection easily and securely by applying D type FF with a clock of a frequency nearly equal to an FM reproduced signal and then by storing for a certain time the state of the FM reproduced signal input applied at the fall of the clock.
CONSTITUTION: Once a reproduced FM signal amplitude-limited by limiter 1 is applied to free-running delayed multivibrator 2, multivibrator 2 generates and applies a clock signal, which has a frequency nearly equal to that of the FM reproduced signal and is slightly delayed, to D type FF5 and an inverted clock passed through inverter 7 is applied to D type FF6. Then, FF5 and 6 remember the states of the FM reproduced signal amplitude-limited through limiter 4 and synchronizing pulses in one period from the fall to the next fall to the clock respectively. Therefore, FF6 and 5 generate low-level outputs according to positive and negative-side dropouts and the high-level output of NAND gate 8 serves as the dropout detection signal, thereby detecting the dropouts easily and securely.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8884979A JPS5613505A (en) | 1979-07-12 | 1979-07-12 | Dropout detecting circuit of reproducing device of recorded information |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8884979A JPS5613505A (en) | 1979-07-12 | 1979-07-12 | Dropout detecting circuit of reproducing device of recorded information |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5613505A true JPS5613505A (en) | 1981-02-09 |
JPS6120941B2 JPS6120941B2 (en) | 1986-05-24 |
Family
ID=13954420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8884979A Granted JPS5613505A (en) | 1979-07-12 | 1979-07-12 | Dropout detecting circuit of reproducing device of recorded information |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5613505A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61145762A (en) * | 1984-12-19 | 1986-07-03 | Canon Inc | Reproducer |
US8613520B2 (en) | 2008-07-11 | 2013-12-24 | Li-Cor, Inc. | Process of forming a light beam path in a dielectric mirror |
-
1979
- 1979-07-12 JP JP8884979A patent/JPS5613505A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61145762A (en) * | 1984-12-19 | 1986-07-03 | Canon Inc | Reproducer |
US8613520B2 (en) | 2008-07-11 | 2013-12-24 | Li-Cor, Inc. | Process of forming a light beam path in a dielectric mirror |
Also Published As
Publication number | Publication date |
---|---|
JPS6120941B2 (en) | 1986-05-24 |
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