JPS60169765U - signal detection circuit - Google Patents
signal detection circuitInfo
- Publication number
- JPS60169765U JPS60169765U JP5724584U JP5724584U JPS60169765U JP S60169765 U JPS60169765 U JP S60169765U JP 5724584 U JP5724584 U JP 5724584U JP 5724584 U JP5724584 U JP 5724584U JP S60169765 U JPS60169765 U JP S60169765U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- detection circuit
- signal detection
- detection
- light receiving
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図面は本考案に係る信号検出回路の実施例を示し、第１
図は本考案に係る信号検出回路の実施例及び動作原理を
示す回路図であり、第２図は利得可変型増巾器の利得対
光素子出力電流の直流成分を示すグラフ、である。
１：受光素子たるホトトランジスタ、１４：検出部、３
：差動アンプ、６：利得可変型増幅器たるトランジスタ
。The drawings show an embodiment of the signal detection circuit according to the present invention.
The figure is a circuit diagram showing an embodiment and the operating principle of the signal detection circuit according to the present invention, and FIG. 2 is a graph showing the gain of the variable gain amplifier versus the DC component of the optical element output current. 1: Phototransistor as a light receiving element, 14: Detection section, 3
: Differential amplifier, 6: Transistor as variable gain amplifier.
Claims (1)
媒体上の無信号部分を検出するための信号検出回路であ
って、 受光素子から得られる出力信号中の直流成分だけを検出
するための検出部と、該検出部からの出力電圧レベルに
応じて利得が可変される利得可変型増幅器とを備えてお
り、前記受光素子の感度の多寡に拘らず一定の検出信号
が得られるように構成されていることを特徴とする信号
検出回路。[Claims for Utility Model Registration] A signal detection circuit for detecting a signal recorded on a recording medium such as a record or a non-signal portion on the recording medium, which detects a signal in an output signal obtained from a light receiving element. It is equipped with a detection section for detecting only the DC component and a variable gain amplifier whose gain is varied according to the output voltage level from the detection section, and has a constant level regardless of the sensitivity of the light receiving element. A signal detection circuit characterized in that it is configured to obtain a detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5724584U JPS60169765U (en) | 1984-04-20 | 1984-04-20 | signal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5724584U JPS60169765U (en) | 1984-04-20 | 1984-04-20 | signal detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60169765U true JPS60169765U (en) | 1985-11-11 |
| JPH0319043Y2 JPH0319043Y2 (en) | 1991-04-23 |
Family
ID=30581587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5724584U Granted JPS60169765U (en) | 1984-04-20 | 1984-04-20 | signal detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60169765U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54139808U (en) * | 1978-03-22 | 1979-09-28 |
-
1984
- 1984-04-20 JP JP5724584U patent/JPS60169765U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54139808U (en) * | 1978-03-22 | 1979-09-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0319043Y2 (en) | 1991-04-23 |
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