JPS60192539U - input filter circuit - Google Patents
input filter circuitInfo
- Publication number
- JPS60192539U JPS60192539U JP8032284U JP8032284U JPS60192539U JP S60192539 U JPS60192539 U JP S60192539U JP 8032284 U JP8032284 U JP 8032284U JP 8032284 U JP8032284 U JP 8032284U JP S60192539 U JPS60192539 U JP S60192539U
- Authority
- JP
- Japan
- Prior art keywords
- filter
- constant
- input
- filter constant
- selection
- 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
Landscapes
- Networks Using Active Elements (AREA)
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
第１図は本考案による入力フィルタ回路を含む電子式プ
リセットカウンタの一実施例を示すブロック図、第２図
は入力フィルタ回路の主要部の構成を示すブロック図、
第３図はこの入力フィルタ回路の動作を示すフローチャ
ート、第４図は従来の入力フィルタ回路を示す回路図で
ある。 ′１・・・・・・入力回路、２・・・・・・
フィルタ回路、３・・・・・・計数処理回路、４・・・
・・・比較手段、５・・・・・・制御回路、６・・・・
・・比較レジスタ、８・・・・・・記憶手段、１０・・
・・・・フィルタ定数制御手段、１１・・・・・・フィ
ルタ定数選択手段、２０・・・・・・限時抵抗、２１〜
２３・・・・・・限時コンデンサ、２４〜２６・・・・
・・スイッチングトランジスタ、３０・・・・・・アナ
ログフィルタ、３１・・・・・・サンプリングクロック
選択回路、３２・・・・・・クロック発生回路、３３・
・・・・・デジタルフィルタ。FIG. 1 is a block diagram showing an embodiment of an electronic preset counter including an input filter circuit according to the present invention, and FIG. 2 is a block diagram showing the configuration of the main parts of the input filter circuit.
FIG. 3 is a flowchart showing the operation of this input filter circuit, and FIG. 4 is a circuit diagram showing a conventional input filter circuit. '1... Input circuit, 2...
Filter circuit, 3... Counting processing circuit, 4...
... Comparison means, 5 ... Control circuit, 6 ...
...Comparison register, 8...Storage means, 10...
... Filter constant control means, 11 ... Filter constant selection means, 20 ... Time-limiting resistor, 21 -
23... Time limit capacitor, 24-26...
... Switching transistor, 30 ... Analog filter, 31 ... Sampling clock selection circuit, 32 ... Clock generation circuit, 33.
...Digital filter.
Claims (1)
と、夫々の受動素子に一端が接続された無接点スイッチ
とを有し、該無接点スイッチの動作によって異なった時
定数が選択されるアナログフィルタと、
・入力信号を所定周期でサンプリングし、実質
的′ に同一レベルを有する連続した入力信号を有効
入力として出力するデジタルフィルタと、前記デジタル
フィルタに異なった周期のクロック信号を選択して与え
るサンプリングクロック選択手段と、 ゛ フィルタ定数の選択入力を与えるフィルタ定数選択手段
と、 前記フィルタ定数選択手段より与えられたフィルタ定数
を記憶する記憶手段と、 −゛ 前記記憶
手段に記憶されたフィルタ定数を読出し、前記アナログ
フィルタの無接点スイッチ及び前記デジタルフィルタの
前記サンプリングクロック選択手段にフィルタ定数を制
御する信号を与えるフィルタ定数制御手段と、を具備す
ることを特徴とする入力フィルタ回路。[Claims for Utility Model Registration] A utility model that has a plurality of passive elements having different constants constituting a filter and a non-contact switch whose one end is connected to each passive element, and which differs depending on the operation of the non-contact switch. an analog filter whose time constant is selected;
- A digital filter that samples an input signal at a predetermined period and outputs continuous input signals having substantially the same level as an effective input, and a sampling clock selection that selects and supplies clock signals of different periods to the digital filter. means; ゛Filter constant selection means for inputting a selection of a filter constant; storage means for storing the filter constant given by the filter constant selection means; -゛Reading out the filter constant stored in the storage means; An input filter circuit comprising: a non-contact switch of an analog filter; and filter constant control means for supplying a signal for controlling a filter constant to the sampling clock selection means of the digital filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8032284U JPS60192539U (en) | 1984-05-29 | 1984-05-29 | input filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8032284U JPS60192539U (en) | 1984-05-29 | 1984-05-29 | input filter circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60192539U true JPS60192539U (en) | 1985-12-20 |
| JPH0138996Y2 JPH0138996Y2 (en) | 1989-11-21 |
Family
ID=30626061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8032284U Granted JPS60192539U (en) | 1984-05-29 | 1984-05-29 | input filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60192539U (en) |
-
1984
- 1984-05-29 JP JP8032284U patent/JPS60192539U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0138996Y2 (en) | 1989-11-21 |
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