JPH0474320U - - Google Patents
Info
- Publication number
- JPH0474320U JPH0474320U JP11723790U JP11723790U JPH0474320U JP H0474320 U JPH0474320 U JP H0474320U JP 11723790 U JP11723790 U JP 11723790U JP 11723790 U JP11723790 U JP 11723790U JP H0474320 U JPH0474320 U JP H0474320U
- Authority
- JP
- Japan
- Prior art keywords
- auxiliary power
- memory
- voltage
- power supply
- power source
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Power Sources (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Description
第１図は本考案第１実施例の回路構成を示す回
路図、第２図は本考案第２実施例の回路構成を示
す回路図である。
１……二次電池、２……一次電池、３……トラ
ンジスタ、４……ＲＡＭ、５……（逆流防止用）
ダイオード、６……ツエナーダイオード、７……
電気２重層コンデンサ、８……電流制限抵抗。
FIG. 1 is a circuit diagram showing the circuit configuration of the first embodiment of the present invention, and FIG. 2 is a circuit diagram showing the circuit configuration of the second embodiment of the present invention. 1... Secondary battery, 2... Primary battery, 3... Transistor, 4... RAM, 5... (For backflow prevention)
Diode, 6... Zener diode, 7...
Electric double layer capacitor, 8... Current limiting resistor.
Claims (1)
より充電可能な第１補助電源と、 電池により構成された第２補助電源と、 前記第１補助電源の供給電圧が予め定めた電圧
以上にある間は前記第１補助電源からメモリに対
してバツクアツプ用電源を供給し、前記第１補助
電源の供給電圧が予め定めた電圧以下になつた場
合は前記第２補助電源から前記メモリに対してバ
ツクアツプ用電源を供給する給電制御手段と を具えたことを特徴とするメモリ用バツクアツプ
電源。[Claims for Utility Model Registration] A first auxiliary power source configured with a battery or a capacitor and rechargeable by the main power source; a second auxiliary power source configured with a battery; and a supply voltage of the first auxiliary power source determined in advance. The first auxiliary power supply supplies backup power to the memory while the supply voltage is higher than the voltage, and when the supply voltage of the first auxiliary power supply falls below a predetermined voltage, the second auxiliary power supply supplies backup power to the memory. 1. A backup power supply for memory, comprising: power supply control means for supplying backup power to a memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11723790U JPH0474320U (en) | 1990-11-09 | 1990-11-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11723790U JPH0474320U (en) | 1990-11-09 | 1990-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0474320U true JPH0474320U (en) | 1992-06-29 |
Family
ID=31865123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11723790U Pending JPH0474320U (en) | 1990-11-09 | 1990-11-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0474320U (en) |
-
1990
- 1990-11-09 JP JP11723790U patent/JPH0474320U/ja active Pending