JPS6338423U - - Google Patents
Info
- Publication number
- JPS6338423U JPS6338423U JP13069286U JP13069286U JPS6338423U JP S6338423 U JPS6338423 U JP S6338423U JP 13069286 U JP13069286 U JP 13069286U JP 13069286 U JP13069286 U JP 13069286U JP S6338423 U JPS6338423 U JP S6338423U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- discharge
- output
- charging
- analog signal
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Analogue/Digital Conversion (AREA)
Description
第1図は、この考案のAD変換器の一実施例を
示す回路図、第2図は、第1図に示した中央処理
装置の動作を説明するためのフローチヤート、第
3図は、第1図に示した回路各部の信号波形図、
第4図は、入力アナログ信号電圧と比較回路の検
知周期の関係を示す図、第5図は、従来のAD変
換器を適用した抵抗測定回路の一例を示す回路図
である。
2……ポテンシヨメータ、11……AD変換器
、12……充・放電回路、13……比較回路、1
4……中央処理装置。
FIG. 1 is a circuit diagram showing an embodiment of the AD converter of this invention, FIG. 2 is a flowchart for explaining the operation of the central processing unit shown in FIG. 1, and FIG. Signal waveform diagram of each part of the circuit shown in Figure 1,
FIG. 4 is a diagram showing the relationship between the input analog signal voltage and the detection period of the comparator circuit, and FIG. 5 is a circuit diagram showing an example of a resistance measuring circuit to which a conventional AD converter is applied. 2... Potentiometer, 11... AD converter, 12... Charge/discharge circuit, 13... Comparison circuit, 1
4...Central processing unit.
Claims (1)
の時定数でもつて充電する充・放電回路と、この
充・放電回路の出力電圧と入力アナログ信号電圧
とを大小比較し、入力アナログ信号電圧が充・放
電回路の出力電圧を越えたことを検知して出力す
る比較回路と、この比較回路の検知出力により動
作し、前記充・放電回路に対し放電を命ずる外部
指令を供給するとともに、単位時間当たりの検知
出力の計数値をもつてデイジタル出力とする演算
手段とからなるAD変換器。 A charging/discharging circuit that instantly discharges in response to an external command and charges with a predetermined time constant compares the output voltage of this charging/discharging circuit with the input analog signal voltage, and determines whether the input analog signal voltage is - A comparator circuit that detects and outputs when the output voltage of the discharge circuit is exceeded, and operates based on the detection output of this comparator circuit, supplies an external command to the charge/discharge circuit to command discharge, and an AD converter comprising arithmetic means for digitally outputting the counted value of the detected output.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13069286U JPS6338423U (en) | 1986-08-27 | 1986-08-27 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13069286U JPS6338423U (en) | 1986-08-27 | 1986-08-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6338423U true JPS6338423U (en) | 1988-03-12 |
Family
ID=31028435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13069286U Pending JPS6338423U (en) | 1986-08-27 | 1986-08-27 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6338423U (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5689127A (en) * | 1979-12-21 | 1981-07-20 | Canon Inc | A/d converter |
JPS60223329A (en) * | 1984-04-20 | 1985-11-07 | Tokico Ltd | Analog-digital converter |
-
1986
- 1986-08-27 JP JP13069286U patent/JPS6338423U/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5689127A (en) * | 1979-12-21 | 1981-07-20 | Canon Inc | A/d converter |
JPS60223329A (en) * | 1984-04-20 | 1985-11-07 | Tokico Ltd | Analog-digital converter |
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