JPH0187411U - - Google Patents
Info
- Publication number
- JPH0187411U JPH0187411U JP18194587U JP18194587U JPH0187411U JP H0187411 U JPH0187411 U JP H0187411U JP 18194587 U JP18194587 U JP 18194587U JP 18194587 U JP18194587 U JP 18194587U JP H0187411 U JPH0187411 U JP H0187411U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- heater
- connection point
- differential amplifier
- input
- 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
- 238000009529 body temperature measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Details Of Flowmeters (AREA)
- Measuring Volume Flow (AREA)
- Control Of Temperature (AREA)
Description
第１図は本考案に係わるヒータ・コントロール
回路の一実施例を示す回路図、第２図は本考案の
第２の実施例を示す回路図、第３図〜第５図は本
考案の効果の一例を示すグラフ、第６図は従来の
ヒータ・コントロール回路を示す回路図である。
１……差動増幅器、Ｒ１……第１の抵抗、Ｒ２
……第２の抵抗、ＲＨ……ヒータ用抵抗、ＲＲ…
…リフアレンス抵抗、ＶＲ……可変抵抗。
Fig. 1 is a circuit diagram showing an embodiment of the heater control circuit according to the present invention, Fig. 2 is a circuit diagram showing a second embodiment of the invention, and Figs. 3 to 5 are effects of the present invention. FIG. 6 is a circuit diagram showing a conventional heater control circuit. 1... Differential amplifier, R1... First resistor, R2
...Second resistor, RH...Resistance for heater, RR...
...Reference resistance, VR...Variable resistance.
Claims (1)
、このヒータ用抵抗の一端に一端が接続された可
変抵抗と、この可変抵抗の他端に一端が接続され
た周囲温度測定用のリフアレンス抵抗と、このリ
フアレンス抵抗の他端と前記ヒータ用抵抗の他端
との間に接続された第１および第２の抵抗と、入
力側マイナス端子又は入力側プラス端子が前記ヒ
ータ用抵抗の他端と第１の抵抗との接続点に接続
され、入力側プラス端子又は入力側マイナス端子
が前記リフアレンス抵抗の他端と第２の抵抗との
接続点に接続された差動増幅器とを備え、第１の
抵抗と第２の抵抗との接続点を前記差動増幅器の
出力側に接続し、前記可変抵抗の調整端子をグラ
ンドに接続したことを特徴とするヒータ・コント
ロール回路。 (2) 基動増幅器はＰＮＰトランジスタを有し、
このＰＮＰトランジスタは、ベースが前記差動増
幅器の出力側に接続され、エミツタが電源ライン
に接続され、コレクタが第１の抵抗と第２の抵抗
との接続点に接続されたことを特徴とする実用新
案登録請求の範囲第１項記載のヒータ・コントロ
ール回路。[Claims for Utility Model Registration] (1) A heater resistor that generates heat due to Joule heat, a variable resistor with one end connected to one end of the heater resistor, and a surrounding area with one end connected to the other end of the variable resistor. a reference resistor for temperature measurement; first and second resistors connected between the other end of the reference resistor and the other end of the heater resistor; and an input-side negative terminal or an input-side positive terminal connected to the heater. a differential amplifier connected to a connection point between the other end of the reference resistor and the first resistor, and whose input side positive terminal or input side negative terminal is connected to the connection point between the other end of the reference resistor and the second resistor; A heater control circuit comprising: a connection point between the first resistor and the second resistor is connected to the output side of the differential amplifier, and an adjustment terminal of the variable resistor is connected to ground. (2) The base amplifier has a PNP transistor,
This PNP transistor is characterized in that its base is connected to the output side of the differential amplifier, its emitter is connected to the power supply line, and its collector is connected to the connection point between the first resistor and the second resistor. A heater control circuit according to claim 1 of the utility model registration claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18194587U JPH0751618Y2 (en) | 1987-12-01 | 1987-12-01 | Heater control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18194587U JPH0751618Y2 (en) | 1987-12-01 | 1987-12-01 | Heater control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0187411U true JPH0187411U (en) | 1989-06-09 |
| JPH0751618Y2 JPH0751618Y2 (en) | 1995-11-22 |
Family
ID=31473407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18194587U Expired - Lifetime JPH0751618Y2 (en) | 1987-12-01 | 1987-12-01 | Heater control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751618Y2 (en) |
-
1987
- 1987-12-01 JP JP18194587U patent/JPH0751618Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0751618Y2 (en) | 1995-11-22 |
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