JPS57188173A - Current supply circuit - Google Patents
Current supply circuitInfo
- Publication number
- JPS57188173A JPS57188173A JP7322281A JP7322281A JPS57188173A JP S57188173 A JPS57188173 A JP S57188173A JP 7322281 A JP7322281 A JP 7322281A JP 7322281 A JP7322281 A JP 7322281A JP S57188173 A JPS57188173 A JP S57188173A
- Authority
- JP
- Japan
- Prior art keywords
- input
- operational amplifier
- resistor
- amplifier
- supply circuit
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/001—Current supply source at the exchanger providing current to substations
- H04M19/005—Feeding arrangements without the use of line transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7322281A JPS57188173A (en) | 1981-05-15 | 1981-05-15 | Current supply circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7322281A JPS57188173A (en) | 1981-05-15 | 1981-05-15 | Current supply circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57188173A true JPS57188173A (en) | 1982-11-19 |
JPS6322666B2 JPS6322666B2 (ja) | 1988-05-12 |
Family
ID=13511921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7322281A Granted JPS57188173A (en) | 1981-05-15 | 1981-05-15 | Current supply circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57188173A (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0435669A2 (en) * | 1989-12-27 | 1991-07-03 | STMicroelectronics S.r.l. | Output stage for telephone interface circuit and telephone interface circuit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5537046A (en) * | 1978-09-06 | 1980-03-14 | Nec Corp | Subscriber's circuit |
-
1981
- 1981-05-15 JP JP7322281A patent/JPS57188173A/ja active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5537046A (en) * | 1978-09-06 | 1980-03-14 | Nec Corp | Subscriber's circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0435669A2 (en) * | 1989-12-27 | 1991-07-03 | STMicroelectronics S.r.l. | Output stage for telephone interface circuit and telephone interface circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6322666B2 (ja) | 1988-05-12 |
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