JPS646768A - Signal-level detection circuit - Google Patents
Signal-level detection circuitInfo
- Publication number
- JPS646768A JPS646768A JP62162003A JP16200387A JPS646768A JP S646768 A JPS646768 A JP S646768A JP 62162003 A JP62162003 A JP 62162003A JP 16200387 A JP16200387 A JP 16200387A JP S646768 A JPS646768 A JP S646768A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- capacitor
- charged
- detection circuit
- diode
- 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
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE:To improve detecting accuracy and to improve response, by integrating the output voltage of a detection circuit, which detects the level of a signal that is generated periodically, sampling and holding the output voltage at a fixed timing based on a signal generation period, and resetting an integration circuit immediately after the holding. CONSTITUTION:When a periodic video signal Ei is inputted into a level detection circuit 7, the video signal Ei is detected with a diode 4. A capacitor 6 is charged with the detected voltage. Even if the video signal has reached a peak level and then the signal is decreased, the charged voltage corresponding to the peak level of the input signal is maintained in the capacitor 6 owing to the blocking of the discharge of the capacitor 6 with the diode 4. Said charged voltage is charged into a capacitor 14 and maintained by way of a FET 11. A reset pulse is imparted to a reset circuit 9 at a starting timing Tr of horizontal blanking. A FET 15 is turned ON through a diode 17. The maintained signal charge is discharged and reset. The charge in the capacitor 6 becomes 0V. Then the next charging is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162003A JPS646768A (en) | 1987-06-29 | 1987-06-29 | Signal-level detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162003A JPS646768A (en) | 1987-06-29 | 1987-06-29 | Signal-level detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS646768A true JPS646768A (en) | 1989-01-11 |
Family
ID=15746192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62162003A Pending JPS646768A (en) | 1987-06-29 | 1987-06-29 | Signal-level detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS646768A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015509275A (en) * | 2012-02-01 | 2015-03-26 | コーニンクレッカ フィリップス エヌ ヴェ | Driver device and driving method for driving a load, in particular, an LED unit having one or more LEDs |
| JP2022039237A (en) * | 2020-08-28 | 2022-03-10 | 古河電気工業株式会社 | Pulse signal detector, pulse signal generator, laser device, and pulse signal detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60107167A (en) * | 1983-11-15 | 1985-06-12 | Toshiba Corp | Data transmitter |
| JPS6182174A (en) * | 1984-03-26 | 1986-04-25 | Otani Denki Kk | Peak detecting device |
-
1987
- 1987-06-29 JP JP62162003A patent/JPS646768A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60107167A (en) * | 1983-11-15 | 1985-06-12 | Toshiba Corp | Data transmitter |
| JPS6182174A (en) * | 1984-03-26 | 1986-04-25 | Otani Denki Kk | Peak detecting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015509275A (en) * | 2012-02-01 | 2015-03-26 | コーニンクレッカ フィリップス エヌ ヴェ | Driver device and driving method for driving a load, in particular, an LED unit having one or more LEDs |
| JP2022039237A (en) * | 2020-08-28 | 2022-03-10 | 古河電気工業株式会社 | Pulse signal detector, pulse signal generator, laser device, and pulse signal detection method |
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