JPS6468083A - Signal discriminating device - Google Patents
Signal discriminating deviceInfo
- Publication number
- JPS6468083A JPS6468083A JP62223903A JP22390387A JPS6468083A JP S6468083 A JPS6468083 A JP S6468083A JP 62223903 A JP62223903 A JP 62223903A JP 22390387 A JP22390387 A JP 22390387A JP S6468083 A JPS6468083 A JP S6468083A
- Authority
- JP
- Japan
- Prior art keywords
- amplitude
- signal
- agc
- constant
- reproducing
- 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)
Abstract
PURPOSE:To execute a correct discriminating action in the amplitude dispersion range of a reproducing FM signal by inputting the reproducing FM signal to an automatic gain adjusting circuit (AGC circuit) and inputting an AGC circuit output whose amplitude is made constant by an AGC action to a signal discriminating device. CONSTITUTION:AGC circuits 2 and 3 changes an amplifier 5 gain automatically so that an output amplitude becomes constant. That is, when an input signal amplitude is small, an amplifier gain becomes large, when the input signal amplitude is large, the amplifier gain becomes small and thus, a constant output amplitude can be held over a wide input signal amplitude range. Consequently, the input signal range is the one in which an AGC output amplitude is more constant compared with the dispersion range of the reproducing FM signal. By setting an AGC input dynamic range large, the input signal amplitude of a signal discriminating device 4 becomes an FM signal which does not get under a dispersion influence and has an almost constant amplitude. By setting this to an amplitude suitable for a signal discrimination, a discrimination false action by the amplitude dispersion of the reproducing FM signal can be prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223903A JPS6468083A (en) | 1987-09-09 | 1987-09-09 | Signal discriminating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223903A JPS6468083A (en) | 1987-09-09 | 1987-09-09 | Signal discriminating device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6468083A true JPS6468083A (en) | 1989-03-14 |
Family
ID=16805514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62223903A Pending JPS6468083A (en) | 1987-09-09 | 1987-09-09 | Signal discriminating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6468083A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131340A (en) * | 1989-06-09 | 1992-07-21 | Tokai Kogyo Mishin Kabushiki Kaisha | Selective thread cutting device in a sewing machine |
-
1987
- 1987-09-09 JP JP62223903A patent/JPS6468083A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131340A (en) * | 1989-06-09 | 1992-07-21 | Tokai Kogyo Mishin Kabushiki Kaisha | Selective thread cutting device in a sewing machine |
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