JPH0336988U - - Google Patents
Info
- Publication number
- JPH0336988U JPH0336988U JP1989098745U JP9874589U JPH0336988U JP H0336988 U JPH0336988 U JP H0336988U JP 1989098745 U JP1989098745 U JP 1989098745U JP 9874589 U JP9874589 U JP 9874589U JP H0336988 U JPH0336988 U JP H0336988U
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- receiving element
- light
- power supply
- sensors
- 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
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Description
第１図は本考案一実施例の媒体検知装置を示す
ブロツク図、第２図は従来の媒体検知装置を示す
ブロツク図、第３図はインピーダンス変換回路と
して用いられるＦＥＴの特性を示す図、第４図は
受光トランジスタの特性を示す図、第５図は第１
図の装置の動作を示すタイムチヤートである。
Ｓ１〜Ｓｎ……センサ、２……発光ダイオード
、３……受光トランジスタ、４……センサ選択回
路、５……インピーダンス変換回路、６……可変
負荷抵抗回路、７……比較回路、８……ラツチ回
路、１３……記憶部、１６……制御部、１８……
アドレス生成回路、１９……媒体取扱装置。
FIG. 1 is a block diagram showing a medium detection device according to an embodiment of the present invention, FIG. 2 is a block diagram showing a conventional medium detection device, FIG. 3 is a diagram showing characteristics of an FET used as an impedance conversion circuit, and FIG. Figure 4 shows the characteristics of the light-receiving transistor, and Figure 5 shows the characteristics of the light-receiving transistor.
3 is a time chart showing the operation of the device shown in the figure. S1-Sn...Sensor, 2...Light emitting diode, 3...Light receiving transistor, 4...Sensor selection circuit, 5...Impedance conversion circuit, 6...Variable load resistance circuit, 7...Comparison circuit, 8... Latch circuit, 13... Storage section, 16... Control section, 18...
Address generation circuit, 19...media handling device.
Claims (1)
受光素子とを有し、上記受光素子は第１および第
２の端子間のインピーダンスが受光量に応じて変
化し、上記第１の端子が第１の電源端子に接続さ
れた複数の光学式センサと、 複数のセンサに共通に設けられ、第１の端子が
第２の電源端子に接続された負荷抵抗回路と、 上記複数のセンサの一つを選択し、選択したセ
ンサの受光素子の上記第２の端子を上記負荷抵抗
回路の第２の端子に接続するセンサ選択回路とを
備え、 上記センサ選択回路は選択していない受光素子
の上記第２の端子を上記第１の電源端子に接続す
ることを特徴とする光学式媒体検知装置。[Claims for Utility Model Registration] A light emitting element and a light receiving element are arranged opposite to each other, and the impedance between the first and second terminals of the light receiving element changes according to the amount of light received. a plurality of optical sensors having a first terminal connected to a first power supply terminal; a load resistance circuit provided in common to the plurality of sensors and having a first terminal connected to a second power supply terminal; a sensor selection circuit that selects one of the plurality of sensors and connects the second terminal of the light receiving element of the selected sensor to the second terminal of the load resistor circuit; An optical medium detecting device characterized in that the second terminal of the light-receiving element is connected to the first power supply terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9874589U JPH0740231Y2 (en) | 1989-08-24 | 1989-08-24 | Media detection device |
| KR1019890012704A KR950015068B1 (en) | 1988-09-02 | 1989-09-02 | Medium detecting system with automatic compensation for senso bariatons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9874589U JPH0740231Y2 (en) | 1989-08-24 | 1989-08-24 | Media detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0336988U true JPH0336988U (en) | 1991-04-10 |
| JPH0740231Y2 JPH0740231Y2 (en) | 1995-09-13 |
Family
ID=31647830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9874589U Expired - Lifetime JPH0740231Y2 (en) | 1988-09-02 | 1989-08-24 | Media detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0740231Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005101894A1 (en) * | 2004-04-13 | 2005-10-27 | Matsushita Electric Industrial Co., Ltd. | Speaker device |
-
1989
- 1989-08-24 JP JP9874589U patent/JPH0740231Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005101894A1 (en) * | 2004-04-13 | 2005-10-27 | Matsushita Electric Industrial Co., Ltd. | Speaker device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0740231Y2 (en) | 1995-09-13 |
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