JPS6454520A - Power source control circuit - Google Patents
Power source control circuitInfo
- Publication number
- JPS6454520A JPS6454520A JP62211085A JP21108587A JPS6454520A JP S6454520 A JPS6454520 A JP S6454520A JP 62211085 A JP62211085 A JP 62211085A JP 21108587 A JP21108587 A JP 21108587A JP S6454520 A JPS6454520 A JP S6454520A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- power source
- quickly
- charge
- power supply
- 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
- Power Sources (AREA)
Abstract
PURPOSE:To stabilize a power supply voltage of a circuit system for always supplying a power source, and to prevent a malfunction by providing a switching means for discharging quickly a charge which has been charged to a bypass capacitor, when a power supply from a power source circuit is turned off. CONSTITUTION:When an operation of a circuit shown in the figure is ended and its operating state is shifted to a non-operating state, first of all, a control circuit CONT sets an output signal PON to an H level and stops an operation of a power source circuit PS. Thereafter, when an output signal DIS is set to an L level, transistors Q1, Q2 conduct and a charge which has been charged to a bypass use capacitor C is discharged quickly. As a result, an output VDD of the circuit PS becomes 0V quickly, therefore, since the time when a through- current flows to a circuit system BU becomes extremely short, a power supply voltage VBK does not drop and the system operates stably. Unless the switching means Q1, Q2 and R discharge quickly the charge of the capacitor C, the output VDD drops as shown with a broken line, therefore, the through-current flows for many hours, and as a result, the voltage VBK drops and a malfunction of the system BU is caused.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62211085A JP2701266B2 (en) | 1987-08-25 | 1987-08-25 | Electronics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62211085A JP2701266B2 (en) | 1987-08-25 | 1987-08-25 | Electronics |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6454520A true JPS6454520A (en) | 1989-03-02 |
JP2701266B2 JP2701266B2 (en) | 1998-01-21 |
Family
ID=16600169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62211085A Expired - Lifetime JP2701266B2 (en) | 1987-08-25 | 1987-08-25 | Electronics |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2701266B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0415369U (en) * | 1990-05-28 | 1992-02-07 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5572219A (en) * | 1978-11-27 | 1980-05-30 | Mitsubishi Electric Corp | Power circuit |
-
1987
- 1987-08-25 JP JP62211085A patent/JP2701266B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5572219A (en) * | 1978-11-27 | 1980-05-30 | Mitsubishi Electric Corp | Power circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0415369U (en) * | 1990-05-28 | 1992-02-07 |
Also Published As
Publication number | Publication date |
---|---|
JP2701266B2 (en) | 1998-01-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |