JPS5496397A - Cell voltage detector circuit for smoke detector - Google Patents
Cell voltage detector circuit for smoke detectorInfo
- Publication number
- JPS5496397A JPS5496397A JP300278A JP300278A JPS5496397A JP S5496397 A JPS5496397 A JP S5496397A JP 300278 A JP300278 A JP 300278A JP 300278 A JP300278 A JP 300278A JP S5496397 A JPS5496397 A JP S5496397A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- cell
- reference voltage
- output
- comparator
- 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
- Fire-Detection Mechanisms (AREA)
Abstract
PURPOSE: To secure a high-accuracy checking for the cell even with the lower voltage by giving the multiple voltage rectification to the oscillation output of the oscillator circuit which is driven by the cell and thus obtaining the power voltage for the smoke detector.
CONSTITUTION: The oscillation output of oscillator circuit 2 which is driven by one unit of cell 1 is boosted and rectified by voltage multiplication circuit 3, and the voltage boosted and rectified becomes the power voltage of the smoke detector. The power voltage is stabilized through reference voltage generator circuit 6 to be used as the reference voltage for detection of the cell voltages as well as to form the reference voltage of comparator 5. On the other hand, the comparison output of comparator 5 supplies directly the voltage of cell 1 and is then compared with the above mentioned reference voltage. Output circuit 7 connected to the output terminal of comparator 5 generates the detection signal for the cell run-down when the output of comparator 5 generated when the cell voltage becomes less than the reference voltage is supplied. Thus, the reference voltage obtained by stabilizing the power voltage is compared with the cell voltage, ensuring a high-accuracy checking for the cell even with the low-voltage power source.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP300278A JPS5496397A (en) | 1978-01-14 | 1978-01-14 | Cell voltage detector circuit for smoke detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP300278A JPS5496397A (en) | 1978-01-14 | 1978-01-14 | Cell voltage detector circuit for smoke detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5496397A true JPS5496397A (en) | 1979-07-30 |
Family
ID=11545148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP300278A Pending JPS5496397A (en) | 1978-01-14 | 1978-01-14 | Cell voltage detector circuit for smoke detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5496397A (en) |
-
1978
- 1978-01-14 JP JP300278A patent/JPS5496397A/en active Pending
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