JPS62138215U - - Google Patents
Info
- Publication number
- JPS62138215U JPS62138215U JP2569186U JP2569186U JPS62138215U JP S62138215 U JPS62138215 U JP S62138215U JP 2569186 U JP2569186 U JP 2569186U JP 2569186 U JP2569186 U JP 2569186U JP S62138215 U JPS62138215 U JP S62138215U
- Authority
- JP
- Japan
- Prior art keywords
- current
- voltage
- input
- circuit
- load
- 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
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Control Of Electrical Variables (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図はそれを適用した電気―空気圧変換器を示す構
成図、第３図および第４図はそれぞれ本考案の他
の実施例を示す回路図である。
１１……定電圧回路、１２……スパン調整回路
、ＯＰ１，ＯＰ２……演算増幅器、Ｑ１……トラ
ンジスタ、Ｒ１，Ｒ２，Ｒｃ……抵抗、ＲＢ，Ｒ
Ｚ……可変低抗、ＶＳ……基準電圧源。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a block diagram showing an electro-pneumatic converter to which the same is applied, and FIGS. 3 and 4 are circuit diagrams showing other embodiments of the present invention, respectively. 11... Constant voltage circuit, 12... Span adjustment circuit, OP1 , OP2 ... Operational amplifier, Q1 ... Transistor, R1 , R2 , Rc... Resistor, RB, R
Z...Variable low resistance, VS...Reference voltage source.
Claims (1)
入力電流に比例した電流を供給する電流供給回路
において、負荷に直列に接続されたスパン調整回
路と、入力電流から常に一定値の電流を分流する
零点調整用の可変インピーダンス素子と、スパン
調整回路より後段に接続され電流入力端子間の電
圧を一定値に保つ定電圧回路とを有し、スパン調
整回路は、負荷の一端に接続されたインピーダン
ス素子と、このインピーダンス素子と負荷との接
続点に非反転入力端子を接続した第１の演算増幅
器と、この第１の演算増幅器の反転入力端子およ
び出力端子と上記インピーダンス素子の他端との
間に接続された可変インピーダンス素子とを含み
、定電圧回路は、負荷に直列に挿入されたトラン
ジスタと、電流入力端子間電圧を分圧する分圧回
路と、この分圧回路による分圧出力を一方の入力
とし基準電圧を他方の入力とするとともに出力を
上記トランジスタの制御信号とする第２の演算増
幅器とを含むことを特徹とする電流供給回路。 In a current supply circuit that receives an input current that changes in a predetermined width and supplies a current proportional to the input current to the load, a span adjustment circuit that is connected in series with the load always divides a constant value of current from the input current. It has a variable impedance element for zero point adjustment and a constant voltage circuit that is connected after the span adjustment circuit and keeps the voltage between the current input terminals at a constant value.The span adjustment circuit has an impedance element connected to one end of the load. and a first operational amplifier having a non-inverting input terminal connected to the connection point between the impedance element and the load, and between the inverting input terminal and output terminal of the first operational amplifier and the other end of the impedance element. The constant voltage circuit includes a transistor inserted in series with the load, a voltage dividing circuit that divides the voltage between the current input terminals, and a divided voltage output from this voltage dividing circuit to one input. and a second operational amplifier whose other input is a reference voltage and whose output is a control signal for the transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2569186U JPH063452Y2 (en) | 1986-02-26 | 1986-02-26 | Current supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2569186U JPH063452Y2 (en) | 1986-02-26 | 1986-02-26 | Current supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62138215U true JPS62138215U (en) | 1987-08-31 |
| JPH063452Y2 JPH063452Y2 (en) | 1994-01-26 |
Family
ID=30826083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2569186U Expired - Lifetime JPH063452Y2 (en) | 1986-02-26 | 1986-02-26 | Current supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063452Y2 (en) |
-
1986
- 1986-02-26 JP JP2569186U patent/JPH063452Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH063452Y2 (en) | 1994-01-26 |
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