JPH0292514U - - Google Patents
Info
- Publication number
- JPH0292514U JPH0292514U JP17116188U JP17116188U JPH0292514U JP H0292514 U JPH0292514 U JP H0292514U JP 17116188 U JP17116188 U JP 17116188U JP 17116188 U JP17116188 U JP 17116188U JP H0292514 U JPH0292514 U JP H0292514U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- amplifier
- constant current
- load resistor
- protective
- 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 3
- 230000001681 protective effect Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第１図は本考案の一実施例を示す接続図、第２
図は従来回路の一例を示す接続図である。
Ｕ……ＯＰアンプ、ＲＬ……負荷抵抗、Ｒ１〜
Ｒ３……抵抗、Ｅ１，Ｅ２……電源、Ｑ……トラ
ンジスタ、Ｃｆ……コンデンサ。
Fig. 1 is a connection diagram showing one embodiment of the present invention;
The figure is a connection diagram showing an example of a conventional circuit. U...OP amplifier, RL...Load resistance, R1~
R3...Resistor, E1, E2...Power supply, Q...Transistor, Cf...Capacitor.
Claims (1)
と、このコンデンサの両端にそれぞれ保護抵抗を
介して接続される負荷抵抗と、この負荷抵抗に供
給する定電流の大きさを決めるための抵抗と、こ
の抵抗及び前記保護抵抗を介してＯＰアンプの入
力端に負極性の電圧を印加する電源とを備え、前
記負荷抵抗に保護抵抗を介して定電流を供給する
ようにした回路において、 前記ＯＰアンプの出力段に接続される保護抵抗
と負荷抵抗との間にベースに正極性の電圧が印加
されたトランジスタを挿入接続したことを特徴と
する定電流回路。[Scope of claim for utility model registration] A capacitor connected to the input and output terminals of the OP amplifier, a load resistor connected to both ends of this capacitor via protective resistors, and the magnitude of the constant current supplied to this load resistor. and a power supply that applies a negative polarity voltage to the input terminal of the OP amplifier via this resistor and the protective resistor, and supplies a constant current to the load resistor via the protective resistor. A constant current circuit characterized in that a transistor having a base to which a voltage of positive polarity is applied is inserted and connected between a protection resistor and a load resistor connected to the output stage of the OP amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17116188U JPH0292514U (en) | 1988-12-29 | 1988-12-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17116188U JPH0292514U (en) | 1988-12-29 | 1988-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0292514U true JPH0292514U (en) | 1990-07-23 |
Family
ID=31462745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17116188U Pending JPH0292514U (en) | 1988-12-29 | 1988-12-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0292514U (en) |
-
1988
- 1988-12-29 JP JP17116188U patent/JPH0292514U/ja active Pending
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