JPH0246436U - - Google Patents
Info
- Publication number
- JPH0246436U JPH0246436U JP12509988U JP12509988U JPH0246436U JP H0246436 U JPH0246436 U JP H0246436U JP 12509988 U JP12509988 U JP 12509988U JP 12509988 U JP12509988 U JP 12509988U JP H0246436 U JPH0246436 U JP H0246436U
- Authority
- JP
- Japan
- Prior art keywords
- noise
- input
- voltage
- current limiting
- capacitor
- 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
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
Landscapes
- Electronic Switches (AREA)
- Input From Keyboards Or The Like (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
および第３図は本実施例の具体的な回路構成例を
示す図、第４図は通常入力信号線間上に誘起され
るノイズ電圧波形を示す図、第５図は第４図のノ
イズ電圧波形の拡大図、第６図はコンデンサＣ１
間のノイズ電圧の充電特性を、縦軸にコンデンサ
Ｃ１の充電電圧、横軸に充電時間をとり示した図
、第７図は従来の入力装置の回路図、第８図は第
１図の回路にノイズバイパス用コンデンサを追加
した回路図である。
１ａ…入力信号端子、１ｂ…コモン端子、Ｒ１
…入力電流制限抵抗、Ｒ２…レベル調整抵抗、Ｒ
３…プルアツプ抵抗、Ｒ４…ノイズ電流制限抵抗
、３…整流用ダイオードブリツジ、４…フオトカ
プラ、Ｃ１…ノイズ電流バイパスコンデンサ、６
…電圧非直線素子、６ａ…ツエナーダイオード、
６ｂ…バリスタ、７…入力電流制限抵抗分割点、
Ａ…ノイズ幅、Ｂ…ノイズ電圧振幅、Ｃ…ノイズ
パルス周期、Ｄ…ノイズ電圧曲線（ノイズが小）
、Ｅ…ノイズ電圧曲線（ノイズが中）、Ｆ…ノイ
ズ電圧曲線（ノイズが大）、Ｇ…ノイズ電圧のパ
ルス幅。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIGS. 2 and 3 are diagrams showing specific circuit configuration examples of this embodiment, and FIG. A diagram showing the noise voltage waveform. Figure 5 is an enlarged view of the noise voltage waveform in Figure 4. Figure 6 is the capacitor C 1.
Figure 7 is a circuit diagram of a conventional input device, and Figure 8 is a diagram showing the charging characteristics of the noise voltage between the capacitor C1 and the charging voltage of capacitor C1 on the vertical axis and the charging time on the horizontal axis. It is a circuit diagram in which a noise bypass capacitor is added to the circuit. 1a...Input signal terminal, 1b...Common terminal, R1
…Input current limiting resistor, R2 …Level adjusting resistor, R
3 ... Pull-up resistor, R 4 ... Noise current limiting resistor, 3... Rectifier diode bridge, 4... Photo coupler, C 1 ... Noise current bypass capacitor, 6
... Voltage nonlinear element, 6a... Zener diode,
6b... Varistor, 7... Input current limiting resistance division point,
A...Noise width, B...Noise voltage amplitude, C...Noise pulse period, D...Noise voltage curve (small noise)
, E... Noise voltage curve (medium noise), F... Noise voltage curve (large noise), G... Pulse width of noise voltage.
Claims (1)
とを特徴とする入力装置。 ２ 前記電圧非直線素子の一方端は、前記２入力
端子のうちの入力信号端子側の入力電流制限抵抗
の分割点に接続したことを特徴とする請求項１記
載の入力装置。[Claims for Utility Model Registration] 1. An input device characterized in that a voltage nonlinear element is inserted between two input terminals. 2. The input device according to claim 1, wherein one end of the voltage nonlinear element is connected to a dividing point of an input current limiting resistor on the input signal terminal side of the two input terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12509988U JPH0246436U (en) | 1988-09-27 | 1988-09-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12509988U JPH0246436U (en) | 1988-09-27 | 1988-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0246436U true JPH0246436U (en) | 1990-03-29 |
Family
ID=31375400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12509988U Pending JPH0246436U (en) | 1988-09-27 | 1988-09-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246436U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57119941A (en) * | 1981-07-13 | 1982-07-26 | Sumitomo Chem Co Ltd | Polymeric material composition containing pigment and stabilizer |
-
1988
- 1988-09-27 JP JP12509988U patent/JPH0246436U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57119941A (en) * | 1981-07-13 | 1982-07-26 | Sumitomo Chem Co Ltd | Polymeric material composition containing pigment and stabilizer |
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