JPS6415973U - - Google Patents
Info
- Publication number
- JPS6415973U JPS6415973U JP10652887U JP10652887U JPS6415973U JP S6415973 U JPS6415973 U JP S6415973U JP 10652887 U JP10652887 U JP 10652887U JP 10652887 U JP10652887 U JP 10652887U JP S6415973 U JPS6415973 U JP S6415973U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- discharges
- discharge
- circuit
- counter
- 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 4
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000010354 integration Effects 0.000 description 1
Description
第１図は一実施例を示すブロツク図、第２図Ａ
及びＢはそれぞれ第１図の各点での信号を示す波
形図、第３図は第２の実施例を示すブロツク図、
第４図は同実施例の動作を示す波形図、第５図Ａ
及び同図Ｂはハムノイズを除去するための積分区
間を示す波形図、第６図は従来の検出回路とＦＩ
Ｄを示す概略図である。
１……ＦＩＤのコレクタ、１０……演算増幅器
、１２……コンデンサ、１６……比較器、１８…
…レベル設定器、２０，２０ａ……カウンタ、２
２，２６……ＦＥＴスイツチ、２４……ＣＰＵ、
２８……抵抗、３０……低電圧電源、３２……ク
ロツク発生回路。
Figure 1 is a block diagram showing one embodiment, Figure 2A
and B are waveform diagrams showing signals at each point in FIG. 1, and FIG. 3 is a block diagram showing the second embodiment.
Fig. 4 is a waveform diagram showing the operation of the same embodiment, Fig. 5A
Figure B is a waveform diagram showing the integration interval for removing hum noise, and Figure 6 shows the conventional detection circuit and FI
It is a schematic diagram showing D. 1... Collector of FID, 10... Operational amplifier, 12... Capacitor, 16... Comparator, 18...
...Level setter, 20, 20a...Counter, 2
2, 26...FET switch, 24...CPU,
28...Resistor, 30...Low voltage power supply, 32...Clock generation circuit.
Claims (1)
端子に電流出力型検出器の出力端子が接続され、
前記コンデンサを一定レベルごとに又は一定時間
ごとに放電させる放電回路と、前記コンデンサの
放電回数又は放電時間を計数するカウンタが備え
られている検出回路。 The output terminal of a current output type detector is connected to the input terminal of an integrating circuit including an operational amplifier and a capacitor.
A detection circuit comprising: a discharge circuit that discharges the capacitor at each fixed level or at fixed time intervals; and a counter that counts the number of discharges or the discharge time of the capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10652887U JPS6415973U (en) | 1987-07-11 | 1987-07-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10652887U JPS6415973U (en) | 1987-07-11 | 1987-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6415973U true JPS6415973U (en) | 1989-01-26 |
Family
ID=31340119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10652887U Pending JPS6415973U (en) | 1987-07-11 | 1987-07-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6415973U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4437286A1 (en) * | 1993-10-19 | 1995-04-20 | Unisia Jecs Corp | System for detecting the combustion state of an internal combustion engine |
| JP2002311065A (en) * | 2001-04-17 | 2002-10-23 | Seiko Instruments Inc | Charging and discharge current detection circuit |
| WO2004097434A1 (en) * | 2003-04-28 | 2004-11-11 | Hamamatsu Photonics K.K. | I/f conversion device and photo-detection device |
| WO2006006575A1 (en) * | 2004-07-12 | 2006-01-19 | Hamamatsu Photonics K.K. | Photodetector |
| JP2006133135A (en) * | 2004-11-08 | 2006-05-25 | Rohm Co Ltd | Current detection circuit and signal detector using it |
| JP2010062537A (en) * | 2008-08-08 | 2010-03-18 | Semiconductor Energy Lab Co Ltd | Photoelectric conversion device and electronic device having the same |
| JP2013205325A (en) * | 2012-03-29 | 2013-10-07 | Asahi Kasei Electronics Co Ltd | Current measuring device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4924459A (en) * | 1972-06-27 | 1974-03-04 | ||
| JPS6183967A (en) * | 1984-09-29 | 1986-04-28 | Toshiba Corp | Apparatus for measuring minute current |
-
1987
- 1987-07-11 JP JP10652887U patent/JPS6415973U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4924459A (en) * | 1972-06-27 | 1974-03-04 | ||
| JPS6183967A (en) * | 1984-09-29 | 1986-04-28 | Toshiba Corp | Apparatus for measuring minute current |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4437286A1 (en) * | 1993-10-19 | 1995-04-20 | Unisia Jecs Corp | System for detecting the combustion state of an internal combustion engine |
| JP2002311065A (en) * | 2001-04-17 | 2002-10-23 | Seiko Instruments Inc | Charging and discharge current detection circuit |
| JP4533554B2 (en) * | 2001-04-17 | 2010-09-01 | セイコーインスツル株式会社 | Charge / discharge current detection circuit, battery state monitoring circuit, secondary battery device, and charge / discharge current detection method |
| WO2004097434A1 (en) * | 2003-04-28 | 2004-11-11 | Hamamatsu Photonics K.K. | I/f conversion device and photo-detection device |
| US7812877B2 (en) | 2003-04-28 | 2010-10-12 | Hamamatsu Photonics K.K. | I/F conversion device and photo-detection device |
| WO2006006575A1 (en) * | 2004-07-12 | 2006-01-19 | Hamamatsu Photonics K.K. | Photodetector |
| US7532044B2 (en) | 2004-07-12 | 2009-05-12 | Hamamatsu Photonics K.K. | Photodetector |
| JP2006133135A (en) * | 2004-11-08 | 2006-05-25 | Rohm Co Ltd | Current detection circuit and signal detector using it |
| JP2010062537A (en) * | 2008-08-08 | 2010-03-18 | Semiconductor Energy Lab Co Ltd | Photoelectric conversion device and electronic device having the same |
| JP2013205325A (en) * | 2012-03-29 | 2013-10-07 | Asahi Kasei Electronics Co Ltd | Current measuring device |
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