JPS54152919A - Auto-power-off circuit - Google Patents
Auto-power-off circuitInfo
- Publication number
- JPS54152919A JPS54152919A JP6107078A JP6107078A JPS54152919A JP S54152919 A JPS54152919 A JP S54152919A JP 6107078 A JP6107078 A JP 6107078A JP 6107078 A JP6107078 A JP 6107078A JP S54152919 A JPS54152919 A JP S54152919A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- shift register
- battery
- signal
- decision
- 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 prolong the lifetime of a battery by discriminating the count output of a shift register, by clearing the content of the shift register by an operation stop signal, and by using the decision output as an automatic power-off signal.
CONSTITUTION: Add-one circuit 2 is provided to the feedback loop of shift register 1 constituting a digital control circuit, and the count output of shift register 1 is sent to amplifier circuit 3 for amplification, thereby making a dicision by decision circuit 4. Here. the content of register 1 is cleared by an operation stop signal and circuits 2, 3 and 4 are operated periodically to use the decision output as an automatic power-off signal. Consequently, the lifetime of the battery of the digital control circuit driven by the battery can be prolonged.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6107078A JPS54152919A (en) | 1978-05-24 | 1978-05-24 | Auto-power-off circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6107078A JPS54152919A (en) | 1978-05-24 | 1978-05-24 | Auto-power-off circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54152919A true JPS54152919A (en) | 1979-12-01 |
Family
ID=13160505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6107078A Pending JPS54152919A (en) | 1978-05-24 | 1978-05-24 | Auto-power-off circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54152919A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4417135A (en) * | 1979-05-28 | 1983-11-22 | Olympus Optical Co., Ltd. | Power saving electronic counter circuit for tape recorder |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4957743A (en) * | 1972-10-02 | 1974-06-05 | ||
JPS4978437A (en) * | 1972-11-29 | 1974-07-29 | ||
JPS5046044A (en) * | 1973-08-28 | 1975-04-24 | ||
JPS50161102A (en) * | 1974-06-10 | 1975-12-26 |
-
1978
- 1978-05-24 JP JP6107078A patent/JPS54152919A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4957743A (en) * | 1972-10-02 | 1974-06-05 | ||
JPS4978437A (en) * | 1972-11-29 | 1974-07-29 | ||
JPS5046044A (en) * | 1973-08-28 | 1975-04-24 | ||
JPS50161102A (en) * | 1974-06-10 | 1975-12-26 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4417135A (en) * | 1979-05-28 | 1983-11-22 | Olympus Optical Co., Ltd. | Power saving electronic counter circuit for tape recorder |
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