JPS5627685A - Voltage controller for electronic timepiece - Google Patents
Voltage controller for electronic timepieceInfo
- Publication number
- JPS5627685A JPS5627685A JP10334879A JP10334879A JPS5627685A JP S5627685 A JPS5627685 A JP S5627685A JP 10334879 A JP10334879 A JP 10334879A JP 10334879 A JP10334879 A JP 10334879A JP S5627685 A JPS5627685 A JP S5627685A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- oscillation
- counter
- detection
- 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
Landscapes
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
Abstract
PURPOSE: To perform voltage control to improve starting and lengthen the lifetime of a lithium battery, by controlling a switch circuit depending on the detected output voltage of a battery voltage reduction circuit to select a voltage to be applied to an oscillation circuit and a time measurement circuit.
CONSTITUTION: At the moment of fitting of a lithium battery 1, no voltage is applied to an oscillation circuit and a time measurement circuit such as an oscillation circuit 2, a frequency divider circuit 3 and a counter 4 and to a voltage reduction circuit 5 and a voltage detection circuit 8 detects that the output voltage of the circuit 5 is zero. The transmission gate 9a of a switch circuit 9 is opened by a detection signal from the detection circuit 8 to apply the voltage of the battery 1 to the circuits 2, 3 and the counter 4 to start oscillation and time measurement with good rising. Subsequently, the detection output of the circuit 8 is inverted and the lowered voltage of the circuit 5 is selected through the circuit 9 and applied to the circuits 2, 3 and the counter 4, etc. to perform low power driving. This results in lengthening the lifetime of the lithium battery 1.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10334879A JPS5627685A (en) | 1979-08-14 | 1979-08-14 | Voltage controller for electronic timepiece |
US06/176,379 US4328572A (en) | 1979-08-14 | 1980-08-08 | Voltage control system for electronic timepiece |
GB8026595A GB2064832B (en) | 1979-08-14 | 1980-08-14 | Voltage control system for electronic timepiece |
HK780/84A HK78084A (en) | 1979-08-14 | 1984-10-11 | Voltage control system for electronic timepiece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10334879A JPS5627685A (en) | 1979-08-14 | 1979-08-14 | Voltage controller for electronic timepiece |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5627685A true JPS5627685A (en) | 1981-03-18 |
Family
ID=14351625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10334879A Pending JPS5627685A (en) | 1979-08-14 | 1979-08-14 | Voltage controller for electronic timepiece |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5627685A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0246082U (en) * | 1988-09-26 | 1990-03-29 |
-
1979
- 1979-08-14 JP JP10334879A patent/JPS5627685A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0246082U (en) * | 1988-09-26 | 1990-03-29 |
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