JPS54129442A - Multiple power source circuit - Google Patents
Multiple power source circuitInfo
- Publication number
- JPS54129442A JPS54129442A JP3842378A JP3842378A JPS54129442A JP S54129442 A JPS54129442 A JP S54129442A JP 3842378 A JP3842378 A JP 3842378A JP 3842378 A JP3842378 A JP 3842378A JP S54129442 A JPS54129442 A JP S54129442A
- Authority
- JP
- Japan
- Prior art keywords
- load
- charging
- power source
- battery
- prevention 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.)
- Pending
Links
Abstract
PURPOSE: To permit battery charging to be obtained even when a load is being driven from an AC power source and also permit an overcharging prevention circuit for the battery to be rendered inoperative when driving the load with the battery after the load has been driven for a long period of time from the AC power source.
CONSTITUTION: A switch 1d is provided between a charging prevention circuit 33 and an overcharging prevention circuit 8, a diode 34 is connected between the juncture between rectifier diodes 3c and 3d and the positive side terminal of a smoothing capacitor 4, and a capacitor 35 is connected between the anode side of the diode 34 and earth for applying the output voltage of the capacitor 35 to the overcharging prevention circuit 33. When driving a load from AC, power source switches 1a and 1d are turned on. As a result, voltage is applied to the load 10, while at the same time voltage is applied from the anode of the diode 34 through a variable resistor 42 to the base of a transistor 36 for charging a battery 5. With the charging the base voltage on the transistor 36 is gradually increased, and when it becomes higher than the base voltage on a transistor 37, transistors 36 and 44 are turned on to stop the charging operation.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3842378A JPS54129442A (en) | 1978-03-31 | 1978-03-31 | Multiple power source circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3842378A JPS54129442A (en) | 1978-03-31 | 1978-03-31 | Multiple power source circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54129442A true JPS54129442A (en) | 1979-10-06 |
Family
ID=12524894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3842378A Pending JPS54129442A (en) | 1978-03-31 | 1978-03-31 | Multiple power source circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54129442A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4981843A (en) * | 1972-12-15 | 1974-08-07 |
-
1978
- 1978-03-31 JP JP3842378A patent/JPS54129442A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4981843A (en) * | 1972-12-15 | 1974-08-07 |
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