JPH0159336U - - Google Patents
Info
- Publication number
- JPH0159336U JPH0159336U JP15447087U JP15447087U JPH0159336U JP H0159336 U JPH0159336 U JP H0159336U JP 15447087 U JP15447087 U JP 15447087U JP 15447087 U JP15447087 U JP 15447087U JP H0159336 U JPH0159336 U JP H0159336U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- resistor
- load
- base
- diode
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Electronic Switches (AREA)
Description
第１図はこの考案の駆動回路の実施例を示す図
、第２図は電源電圧に対する第１のトランジスタ
や第２のトランジスタのコレクタ電力損失および
第２のトランジスタのコレクタに接続された抵抗
の電力損失などを示した図、第３図は従来の駆動
回路を示す図、第４図は電源電圧に対するトラン
ジスタの電力損失を示すもの、第５図はこの考案
によらない駆動回路例である。
Ｑ１……第１のトランジスタ、Ｑ２……第２の
トランジスタ、ＳＬ……電磁ソレノイド、ＯＰ…
…演算増幅器、Ｄ−ダイオード、Ｒ１，Ｒ２，Ｒ
３，Ｒ４，Ｒ５，Ｒ６……抵抗。
Fig. 1 is a diagram showing an embodiment of the drive circuit of this invention, and Fig. 2 shows the collector power loss of the first transistor and the second transistor with respect to the power supply voltage, and the power of the resistor connected to the collector of the second transistor. 3 is a diagram showing a conventional drive circuit, FIG. 4 is a diagram showing power loss of a transistor with respect to a power supply voltage, and FIG. 5 is an example of a drive circuit not based on this invention. Q1 ...first transistor, Q2 ...second transistor, SL...electromagnetic solenoid, OP...
…Operation amplifier, D-diode, R 1 , R 2 , R
3 , R4 , R5 , R6 ...Resistance.
Claims (1)
を直列に接続し、この第１のトランジスタのベー
スをダイオードと抵抗を介して演算増幅器の出力
端子に接続し、前記第１のトランジスタと負荷と
の接続点と前記演算増幅器の一方の入力端子との
間に前記負荷の両端の電圧が常に一定となるよう
に帰還回路を形成し、さらに、前記第１のトラン
ジスタに並列に第２のトランジスタを設け、その
第２のトランジスタのベースは抵抗を介して上記
第１のトランジスタのベース側と接続するダイオ
ードと抵抗の間に接続し、またコレクタに所定の
抵抗を接続して負荷に接続してなる駆動回路。 A first transistor and a load are connected in series between both ends of a DC power source, and the base of the first transistor is connected to an output terminal of an operational amplifier via a diode and a resistor. A feedback circuit is formed between a connection point and one input terminal of the operational amplifier so that the voltage across the load is always constant, and a second transistor is further provided in parallel with the first transistor. , the base of the second transistor is connected between the resistor and a diode connected to the base side of the first transistor via a resistor, and the collector is connected to a predetermined resistor to connect to the load. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15447087U JPH0159336U (en) | 1987-10-08 | 1987-10-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15447087U JPH0159336U (en) | 1987-10-08 | 1987-10-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0159336U true JPH0159336U (en) | 1989-04-13 |
Family
ID=31431227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15447087U Pending JPH0159336U (en) | 1987-10-08 | 1987-10-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0159336U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0521533U (en) * | 1991-08-30 | 1993-03-19 | ミツミ電機株式会社 | Transistor circuit |
-
1987
- 1987-10-08 JP JP15447087U patent/JPH0159336U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0521533U (en) * | 1991-08-30 | 1993-03-19 | ミツミ電機株式会社 | Transistor circuit |
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