JPS56120205A - Current output circuit - Google Patents
Current output circuitInfo
- Publication number
- JPS56120205A JPS56120205A JP2356380A JP2356380A JPS56120205A JP S56120205 A JPS56120205 A JP S56120205A JP 2356380 A JP2356380 A JP 2356380A JP 2356380 A JP2356380 A JP 2356380A JP S56120205 A JPS56120205 A JP S56120205A
- Authority
- JP
- Japan
- Prior art keywords
- output
- current
- input
- reference voltage
- transistor
- 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
Landscapes
- Amplifiers (AREA)
Abstract
PURPOSE: To enable to effectively output only Ac signal current to a load with high output impedance with a simple constitution, by supplying DC operating current to the input amplifying means and controlling the operating current with the difference between the DC voltage of output and the reference voltage.
CONSTITUTION: AC input signal Vi to an input amplifying means 1 is fed to the base of a N-P-N bipolar transistor Q1 being an active element. The reference voltage EB is given as the base bias of the transistor Q1, and DC operating current is fed from a current supply means 2. Further, the current supply means 2 is controlled by the output of a high gain differential amplifier 32, taking the collector output of the transistor Q1 as positive phase input via a low-pass filter 31 and the reference voltage ER as reverse phase input. Thus, AC current component only corresponding to the input signal vi is introduced from the output of the input amplifying means 1.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2356380A JPS56120205A (en) | 1980-02-27 | 1980-02-27 | Current output circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2356380A JPS56120205A (en) | 1980-02-27 | 1980-02-27 | Current output circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56120205A true JPS56120205A (en) | 1981-09-21 |
JPS6211811B2 JPS6211811B2 (en) | 1987-03-14 |
Family
ID=12113982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2356380A Granted JPS56120205A (en) | 1980-02-27 | 1980-02-27 | Current output circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56120205A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0419511U (en) * | 1990-06-05 | 1992-02-19 |
-
1980
- 1980-02-27 JP JP2356380A patent/JPS56120205A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6211811B2 (en) | 1987-03-14 |
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