JPH0193817U - - Google Patents
Info
- Publication number
- JPH0193817U JPH0193817U JP18992287U JP18992287U JPH0193817U JP H0193817 U JPH0193817 U JP H0193817U JP 18992287 U JP18992287 U JP 18992287U JP 18992287 U JP18992287 U JP 18992287U JP H0193817 U JPH0193817 U JP H0193817U
- Authority
- JP
- Japan
- Prior art keywords
- current source
- current
- resistor
- transistors whose
- whose emitters
- 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 7
Landscapes
- Control Of Electrical Variables (AREA)
- Electronic Switches (AREA)
- Amplifiers (AREA)
Description
第１図ａ，ｂ，ｃは本考案の一実施例を示す回
路図、第２図ａ，ｂは本考案の他の実施例を示す
回路図、第３図ａ，ｂは本考案による電流比設定
の説明のための回路図、第４図は本考案でＰＮＰ
型トランジスタを利用した時の回路図、第５図は
スイツチ付アンプの回路図、第６図ａ，ｂは一従
来例を示す回路図、第７図は他の従来例を示す回
路図である。
図中、１Ａはマルチ定電流源回路、２Ａ〜２Ｄ
は差動アンプを示す。
Figures 1a, b, and c are circuit diagrams showing one embodiment of the present invention, Figures 2a and b are circuit diagrams showing other embodiments of the present invention, and Figures 3a and b are current diagrams according to the present invention. The circuit diagram for explanation of ratio setting, Figure 4, is PNP in this invention.
Figure 5 is a circuit diagram of an amplifier with a switch, Figures 6a and b are circuit diagrams showing one conventional example, and Figure 7 is a circuit diagram showing another conventional example. . In the figure, 1A is a multi constant current source circuit, 2A to 2D
indicates a differential amplifier.
Claims (1)
数の第１の電流源トランジスタと、エミツタが第
２の抵抗に共通に接続されている複数の第２の電
流源トランジスタをそれぞれ複数の電流作動回路
に接続し、前記複数の電流作動回路の各々に接続
されている前記第１の電流源トランジスタと、前
記第２の電流源トランジスタの双方のベース電極
に、前記電流作動回路を選択するコントロール信
号が供給されていることを特徴とするマルチ定電
流源回路。 A plurality of current-operated circuits each including a plurality of first current source transistors whose emitters are commonly connected to a first resistor and a plurality of second current source transistors whose emitters are commonly connected to a second resistor. A control signal for selecting the current operating circuit is connected to base electrodes of both the first current source transistor and the second current source transistor connected to each of the plurality of current operating circuits. A multi-constant current source circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18992287U JPH0614497Y2 (en) | 1987-12-16 | 1987-12-16 | Multi constant current source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18992287U JPH0614497Y2 (en) | 1987-12-16 | 1987-12-16 | Multi constant current source circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0193817U true JPH0193817U (en) | 1989-06-20 |
| JPH0614497Y2 JPH0614497Y2 (en) | 1994-04-13 |
Family
ID=31480930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18992287U Expired - Lifetime JPH0614497Y2 (en) | 1987-12-16 | 1987-12-16 | Multi constant current source circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0614497Y2 (en) |
-
1987
- 1987-12-16 JP JP18992287U patent/JPH0614497Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0614497Y2 (en) | 1994-04-13 |