JPS61121028U - - Google Patents
Info
- Publication number
- JPS61121028U JPS61121028U JP490785U JP490785U JPS61121028U JP S61121028 U JPS61121028 U JP S61121028U JP 490785 U JP490785 U JP 490785U JP 490785 U JP490785 U JP 490785U JP S61121028 U JPS61121028 U JP S61121028U
- Authority
- JP
- Japan
- Prior art keywords
- electronic device
- resistors
- filter section
- input
- noise
- 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
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Logic Circuits (AREA)
- Manipulation Of Pulses (AREA)
Description
第１図は本考案に係る入力回路の回路図、第２
図は本考案の入力回路の各部電圧波形を示すグラ
フ、第３図は従来の入力回路の回路図、第４図は
従来の入力回路の各部電圧波形を示すグラフであ
る。
２……電源回路、３……ＩＣ（電子装置）、１
０……フイルタ回路（フイルタ部）、Ｃ……コン
デンサ、Ｒ１，Ｒ２……抵抗、Ｄ……ダイオード
。
Figure 1 is a circuit diagram of an input circuit according to the present invention, Figure 2 is a circuit diagram of an input circuit according to the present invention;
The figure is a graph showing voltage waveforms at various parts of the input circuit of the present invention, FIG. 3 is a circuit diagram of a conventional input circuit, and FIG. 4 is a graph showing voltage waveforms at various parts of a conventional input circuit. 2...Power supply circuit, 3...IC (electronic device), 1
0...Filter circuit (filter section), C...Capacitor, R1 , R2 ...Resistor, D...Diode.
Claims (1)
一対の抵抗とからなるフイルタ部を備え、ノイズ
パルスによる前記フイルタ部内での入力電圧の立
下がりと立上がり波形を電子装置の検出端に入力
し、電子装置内で立下がりと立上がりの時間幅に
よるノイズの有無を判定するようにした電子装置
の入力回路であつて、前記フイルタ部の抵抗間を
電流方向によりバイパスするダイオードを挿入し
、該ダイオードによりノイズパルスによる入力電
圧の立下がりと立上がりの時定数をそれぞれ個別
の抵抗とコンデンサの積により設定したことを特
徴とする電子装置の入力回路。 A filter section consisting of a capacitor and a pair of resistors is interposed between the power supply section and the electronic device, and the falling and rising waveforms of the input voltage within the filter section due to noise pulses are input to the detection terminal of the electronic device, and This is an input circuit for an electronic device that determines the presence or absence of noise based on the time width of falling and rising times in the device, in which a diode is inserted that bypasses between the resistors of the filter section depending on the current direction, and the diode eliminates noise. An input circuit for an electronic device, characterized in that the time constants for the fall and rise of an input voltage due to pulses are set by the products of individual resistors and capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP490785U JPS61121028U (en) | 1985-01-18 | 1985-01-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP490785U JPS61121028U (en) | 1985-01-18 | 1985-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61121028U true JPS61121028U (en) | 1986-07-30 |
Family
ID=30480929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP490785U Pending JPS61121028U (en) | 1985-01-18 | 1985-01-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61121028U (en) |
-
1985
- 1985-01-18 JP JP490785U patent/JPS61121028U/ja active Pending
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