JPS59154929U - bandpass filter - Google Patents
bandpass filterInfo
- Publication number
- JPS59154929U JPS59154929U JP4669483U JP4669483U JPS59154929U JP S59154929 U JPS59154929 U JP S59154929U JP 4669483 U JP4669483 U JP 4669483U JP 4669483 U JP4669483 U JP 4669483U JP S59154929 U JPS59154929 U JP S59154929U
- Authority
- JP
- Japan
- Prior art keywords
- clock pulse
- frequency
- generating means
- output
- capacitor filter
- 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
Landscapes
- Filters That Use Time-Delay 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図および第２図は従来の帯域通過フィルタの回路図
および外部制御のためのホトカプラの構成図、第３図は
本考案の一実施例の構成を示すブロック図、第４図は本
考案の一実施例の作用の説明に供するフローチャート、
第５図は本考案の他の実施例の作用の説明に供するフロ
ーチャートである。
１０・・・・・・スイッチト・キャパシタフィルタ、１
１・・・・・・Ａ／Ｄ変換器、１２・・・・・・クロッ
クパルス発生回路、１３・・・・・・クロックパルス掃
引回路、１４・・・・・・クロックパルス周波数制御回
路。1 and 2 are circuit diagrams of a conventional bandpass filter and a configuration diagram of a photocoupler for external control, FIG. 3 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 4 is a block diagram of the present invention A flowchart for explaining the operation of one embodiment of
FIG. 5 is a flowchart for explaining the operation of another embodiment of the present invention. 10...Switched capacitor filter, 1
1... A/D converter, 12... Clock pulse generation circuit, 13... Clock pulse sweep circuit, 14... Clock pulse frequency control circuit.
Claims (1)
ら希望する周波数成分のみを分離する帯域フィルタであ
って、スイッチト・キャパシタフィルタと、スイッチト
φキャパシタフィルタからの出力レベルを検出する検出
手段と、スイッチト・キャパシタフィルタの中心周波数
を変化させるオクロツクパルスを出力するクロックパル
ス発生手段と、クロックパルス発生手段から出力される
クロックパルスの周波数を増加および減少させて前記検
出手段の出力の最大値を検出してこの最大値に対応する
クロックパルスの周波数に前記クロックパルス発生回路
の出力クロックパルスを制御するクロックパルス周波数
制御回路とを備えてなることを特徴とする帯域通過フィ
ルタ。A bandpass filter that separates only a desired frequency component from a mixed signal obtained by synthesizing known sine waves of different frequencies, and includes a switched capacitor filter and a detection means for detecting the output level from the switched φ capacitor filter. a clock pulse generating means for outputting an oclock pulse that changes the center frequency of the switched capacitor filter; and a clock pulse generating means for increasing and decreasing the frequency of the clock pulse output from the clock pulse generating means to increase and decrease the frequency of the clock pulse outputted from the clock pulse generating means to maximize the output of the detecting means. A clock pulse frequency control circuit that detects a maximum value and controls the output clock pulse of the clock pulse generation circuit to a clock pulse frequency corresponding to the maximum value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4669483U JPS59154929U (en) | 1983-04-01 | 1983-04-01 | bandpass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4669483U JPS59154929U (en) | 1983-04-01 | 1983-04-01 | bandpass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59154929U true JPS59154929U (en) | 1984-10-17 |
Family
ID=30177243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4669483U Pending JPS59154929U (en) | 1983-04-01 | 1983-04-01 | bandpass filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59154929U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55123226A (en) * | 1979-03-16 | 1980-09-22 | Fujitsu Ltd | Switched capacitor filter |
| JPS5767312A (en) * | 1980-10-14 | 1982-04-23 | Takayoshi Hirata | Band pass filter following frequency |
-
1983
- 1983-04-01 JP JP4669483U patent/JPS59154929U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55123226A (en) * | 1979-03-16 | 1980-09-22 | Fujitsu Ltd | Switched capacitor filter |
| JPS5767312A (en) * | 1980-10-14 | 1982-04-23 | Takayoshi Hirata | Band pass filter following frequency |
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