JPS645159U - - Google Patents
Info
- Publication number
- JPS645159U JPS645159U JP9742187U JP9742187U JPS645159U JP S645159 U JPS645159 U JP S645159U JP 9742187 U JP9742187 U JP 9742187U JP 9742187 U JP9742187 U JP 9742187U JP S645159 U JPS645159 U JP S645159U
- Authority
- JP
- Japan
- Prior art keywords
- gas sensor
- sensitivity setting
- setting resistors
- output
- amplifier circuit
- 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
- 230000035945 sensitivity Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Examining Or Testing Airtightness (AREA)
- Emergency Alarm Devices (AREA)
Description
第１図はこの考案の一実施例の具体的な構成を
示す図、第２図は同実施例の全体的な概略構成を
示す図、第３図は同実施例におけるガスセンサの
センサ抵抗とガス濃度との関係を示す図、第４図
は同実施例における増幅回路の出力電圧とガス濃
度との関係を示す図、第５図は同実施例における
センサ出力とガス濃度との関係を示す図、第６図
は同実施例の変形例における増幅回路の出力電圧
とガス濃度との関係を示す図、第７図は従来のガ
スセンサ回路の全体的な概略構成を示す図である
。
１０……ガスセンサ回路、２０……ガスセンサ
、３０……温度補正回路、４０……増幅回路、５
０……感度切換回路。
Fig. 1 is a diagram showing the specific configuration of an embodiment of this invention, Fig. 2 is a diagram showing the overall schematic configuration of the embodiment, and Fig. 3 is a diagram showing the sensor resistance and gas sensor resistance of the gas sensor in the same embodiment. FIG. 4 is a diagram showing the relationship between the output voltage of the amplifier circuit and gas concentration in the same example. FIG. 5 is a diagram showing the relationship between the sensor output and gas concentration in the same example. , FIG. 6 is a diagram showing the relationship between the output voltage of the amplifier circuit and the gas concentration in a modification of the same embodiment, and FIG. 7 is a diagram showing the overall schematic configuration of a conventional gas sensor circuit. 10...Gas sensor circuit, 20...Gas sensor, 30...Temperature correction circuit, 40...Amplification circuit, 5
0... Sensitivity switching circuit.
Claims (1)
サと、このガスセンサの出力を増幅する増幅回路
と、この増幅回路の出力端と基準電源との間に接
続された複数個の感度設定用抵抗と、これら感度
設定用抵抗を選択的に投入切換する手段とを具備
し、感度設定用抵抗を介して得られる電圧をセン
サ出力とすることを特徴とするガスセンサ回路。 A gas sensor whose resistance value changes depending on the gas concentration, an amplifier circuit that amplifies the output of the gas sensor, and a plurality of sensitivity setting resistors connected between the output terminal of the amplifier circuit and a reference power source; A gas sensor circuit comprising means for selectively switching on/off these sensitivity setting resistors, and a voltage obtained through the sensitivity setting resistors is used as a sensor output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9742187U JPS645159U (en) | 1987-06-26 | 1987-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9742187U JPS645159U (en) | 1987-06-26 | 1987-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS645159U true JPS645159U (en) | 1989-01-12 |
Family
ID=31322877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9742187U Pending JPS645159U (en) | 1987-06-26 | 1987-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS645159U (en) |
-
1987
- 1987-06-26 JP JP9742187U patent/JPS645159U/ja active Pending