JPS57168569A - Voltage converting circuit - Google Patents
Voltage converting circuitInfo
- Publication number
- JPS57168569A JPS57168569A JP5303381A JP5303381A JPS57168569A JP S57168569 A JPS57168569 A JP S57168569A JP 5303381 A JP5303381 A JP 5303381A JP 5303381 A JP5303381 A JP 5303381A JP S57168569 A JPS57168569 A JP S57168569A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- transformer
- terminals
- transfer
- 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
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000001131 transforming effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Control Of Voltage And Current In General (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
PURPOSE:To increase the feedable distance of circuit and to miniaturize the size of the circuit, by realizing a circuit that is capable of a conversion of voltage with a small loss and without using any rectifier, etc. and using this circuit for a telephone terminal. CONSTITUTION:The middle point of the transformer T of a voltage converting unit CVTU is connected to a terminal O of intermediate potential, and both ends of the transformer T are connected to terminals C and D alternately according to the transfer of polarity of a transfer switch SW that performs the transfer of polarity in a prescribed period. A DC power supply E is connected between the terminals C and D, and load currents Ia and Ib are supplied to load resistances Ra and Rb from the terminals O, C and D with the equal division of DC voltage V1 and V2. Then the voltage V of the power supply E is equally divided at all times by the transforming function of the transformer T in case the resistances Ra and Rb are unbalanced and the currents Ia and Ib are not equal to each other. Thus the voltages V1 and V2 are always equal to each other. As a result, the feedable distance of a voltage converting circuit is extended with the miniaturization of the circuit attained with no use of a rectifier, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5303381A JPS57168569A (en) | 1981-04-10 | 1981-04-10 | Voltage converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5303381A JPS57168569A (en) | 1981-04-10 | 1981-04-10 | Voltage converting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57168569A true JPS57168569A (en) | 1982-10-16 |
Family
ID=12931571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5303381A Pending JPS57168569A (en) | 1981-04-10 | 1981-04-10 | Voltage converting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57168569A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4944207A (en) * | 1972-09-06 | 1974-04-25 |
-
1981
- 1981-04-10 JP JP5303381A patent/JPS57168569A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4944207A (en) * | 1972-09-06 | 1974-04-25 |
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