JPH0268639U - - Google Patents
Info
- Publication number
- JPH0268639U JPH0268639U JP14589588U JP14589588U JPH0268639U JP H0268639 U JPH0268639 U JP H0268639U JP 14589588 U JP14589588 U JP 14589588U JP 14589588 U JP14589588 U JP 14589588U JP H0268639 U JPH0268639 U JP H0268639U
- Authority
- JP
- Japan
- Prior art keywords
- battery
- ambient temperature
- backup circuit
- memory
- comparison
- 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
- 229910003307 Ni-Cd Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の一実施例におけるバツテリバ
ツクアツプ回路の構成図である。
１：サーミスタ、２：比較回路、３：スイツチ
回路、４：Ｎｉ―Ｃｄバツテリ（ＢＡＴ）、５：
バツクアツプＲＡＭへの電源（ＶＢ）、６：トラ
ンジスタ（ＴＲ２）。
FIG. 1 is a block diagram of a battery backup circuit according to an embodiment of the present invention. 1: Thermistor, 2: Comparison circuit, 3: Switch circuit, 4: Ni-Cd battery (BAT), 5:
Power supply to backup RAM (VB), 6: Transistor (TR 2 ).
Claims (1)
該メモリへ電圧を供給するバツテリバツクアツプ
回路において、該バツテリの周囲温度を検出する
手段と、該周囲温度と所定の設定温度とを比較す
る手段と、該比較手段による比較の結果、該周囲
温度が該設定温度を超えた場合、該バツテリへの
充電電流をカツトする手段とを備えたことを特徴
とするバツテリバツクアツプ回路。 When the power of the memory is turned off, a battery backup circuit that supplies voltage from the battery to the memory includes means for detecting the ambient temperature of the battery, means for comparing the ambient temperature with a predetermined set temperature, and a battery backup circuit that supplies voltage from the battery to the memory. A battery backup circuit comprising means for cutting off charging current to the battery if the ambient temperature exceeds the set temperature as a result of comparison by the comparison means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14589588U JPH0268639U (en) | 1988-11-08 | 1988-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14589588U JPH0268639U (en) | 1988-11-08 | 1988-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0268639U true JPH0268639U (en) | 1990-05-24 |
Family
ID=31414886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14589588U Pending JPH0268639U (en) | 1988-11-08 | 1988-11-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0268639U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634128B2 (en) * | 1979-10-31 | 1988-01-27 | Tokyo Shibaura Electric Co |
-
1988
- 1988-11-08 JP JP14589588U patent/JPH0268639U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634128B2 (en) * | 1979-10-31 | 1988-01-27 | Tokyo Shibaura Electric Co |