JPS5647816A - Constant-voltage electric power supply circuit - Google Patents
Constant-voltage electric power supply circuitInfo
- Publication number
- JPS5647816A JPS5647816A JP12157379A JP12157379A JPS5647816A JP S5647816 A JPS5647816 A JP S5647816A JP 12157379 A JP12157379 A JP 12157379A JP 12157379 A JP12157379 A JP 12157379A JP S5647816 A JPS5647816 A JP S5647816A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- capacitor
- resistors
- power supply
- constant
- 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
- Control Of Voltage And Current In General (AREA)
- Control Of Electrical Variables (AREA)
Abstract
PURPOSE: To suppress a transient high output voltage at the time of start, by superposing the DC voltage which breaks with the prescribed time constant from the time of start, on the saw-tooth signal.
CONSTITUTION: When the power supply switch is turned on, and a ripple voltage appears at the point (a), the constant voltae VB for operation is built up by the resistor 4, the Zener diode 5 and the capacitor 6. As a result, a charging current flows into the capacitor 32 by the route which passes through the capacitor 32 and the resistors 31, 15 from the line of voltage VB, and said current becomes a damping current decided by the time constant consisting of the capacity of the capacitor 32, and the resistance value which has added the resistors 31 and 15. Therefore, immediately after the power supply switch has been turned on, since charge of the capacitor 32 is zero at first, the voltage VB is directly applied to the series circuit of the resistors 31 and 15, this voltage is divided by the resistors 31 and 15 and appears at the point (b), and in consequence, it is superposed on the saw-tooth voltage.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12157379A JPS5647816A (en) | 1979-09-22 | 1979-09-22 | Constant-voltage electric power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12157379A JPS5647816A (en) | 1979-09-22 | 1979-09-22 | Constant-voltage electric power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5647816A true JPS5647816A (en) | 1981-04-30 |
| JPH0217802B2 JPH0217802B2 (en) | 1990-04-23 |
Family
ID=14814571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12157379A Granted JPS5647816A (en) | 1979-09-22 | 1979-09-22 | Constant-voltage electric power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5647816A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4752864A (en) * | 1987-04-24 | 1988-06-21 | Metcal, Inc. | Constant voltage power supply |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2542819Y2 (en) * | 1991-04-24 | 1997-07-30 | コーア株式会社 | Resistor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5343441U (en) * | 1976-09-18 | 1978-04-14 |
-
1979
- 1979-09-22 JP JP12157379A patent/JPS5647816A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5343441U (en) * | 1976-09-18 | 1978-04-14 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4752864A (en) * | 1987-04-24 | 1988-06-21 | Metcal, Inc. | Constant voltage power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0217802B2 (en) | 1990-04-23 |
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