JPH0475977U - - Google Patents
Info
- Publication number
- JPH0475977U JPH0475977U JP11881790U JP11881790U JPH0475977U JP H0475977 U JPH0475977 U JP H0475977U JP 11881790 U JP11881790 U JP 11881790U JP 11881790 U JP11881790 U JP 11881790U JP H0475977 U JPH0475977 U JP H0475977U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- detection
- signal
- power supply
- reference voltage
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 17
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measurement Of Current Or Voltage (AREA)
Description
第１図は本考案の一実施例の回路構成を示す図
、第２図は、上記第１図中の電源電池寿命検出回
路の回路構成を詳細に示す図、第３図は、電池電
圧と、寿命検出の基準電圧の関係を示す図である
。
１……ＣＰＵ、２……アンテナ、３……受信部
、４……デコーダ部、５……ＩＤ−ＲＯＭ、６…
…電源電池、７……キー入力部、８……メツセー
ジメモリ、９……電源電池寿命検出回路、１０…
…ブザードライバ、１１……ブザー、１２……Ｌ
ＥＤドライバ、１３……ＬＥＤ、１４……表示バ
ツフア、１５……表示器、２０，２２……ラツチ
、２１，２３……コンパレータ、Ｔｒ１，Ｔｒ２
……スイツチングトランジスタ。
Fig. 1 is a diagram showing the circuit configuration of an embodiment of the present invention, Fig. 2 is a diagram showing the detailed circuit configuration of the power supply battery life detection circuit in Fig. 1, and Fig. 3 is a diagram showing the battery voltage and , is a diagram showing the relationship between reference voltages for life detection. 1...CPU, 2...Antenna, 3...Receiving section, 4...Decoder section, 5...ID-ROM, 6...
...Power battery, 7...Key input unit, 8...Message memory, 9...Power battery life detection circuit, 10...
...Buzzer driver, 11...Buzzer, 12...L
ED driver, 13...LED, 14...Display buffer, 15...Display device, 20, 22...Latch, 21, 23...Comparator, Tr 1 , Tr 2
...switching transistor.
Claims (1)
かを、制御信号を受けて選び、所定の重負荷駆動
時を除いて常時一定周期で、選んだ上記基準電圧
と電源電池電圧とを比較して、電源電池電圧の方
が低くなつているときに検出信号を送出する第１
検出回路と、 上記所定の重負荷駆動時において、予め上記い
ずれの基準電圧よりも低く設定されている基準電
圧と電源電池電圧とを比較し、電源電池電圧の方
が低くなつているときに検出信号を送出する第２
検出回路と、 第１検出回路が通常の負荷駆動時に検出信号を
送出したとき、および第２検出回路が検出信号を
送出したときは、寿命警報信号を送出し、また、
第１検出回路が、２段階の基準電圧のうちの高い
方の基準電圧を選んでいるときにおいて、上記所
定の重負荷駆動時、第２検出回路が検出信号を送
出せず、かつ上記所定の重負荷の駆動終了後、所
定時間内に第１検出回路が検出信号を送出したと
きには、第１検出回路に制御信号を送り、低い方
の基準電圧を選ばせる制御回路とを備えることを
特徴とする電源電池寿命検出装置。[Claims for Utility Model Registration] One of two preset reference voltage levels is selected in response to a control signal, and the selected reference voltage and the reference voltage are constantly applied at a constant cycle except when driving a predetermined heavy load. A first circuit that compares the power supply battery voltage with the power supply battery voltage and sends out a detection signal when the power supply battery voltage is lower.
The detection circuit compares the power supply battery voltage with a reference voltage that is previously set lower than any of the reference voltages mentioned above during driving with the predetermined heavy load, and detects when the power supply battery voltage is lower. the second to send out the signal
a detection circuit; when the first detection circuit sends out a detection signal during normal load driving and when the second detection circuit sends out a detection signal, it sends out a life warning signal;
When the first detection circuit selects the higher reference voltage of the two levels of reference voltages, the second detection circuit does not send out a detection signal when driving the predetermined heavy load, and the predetermined The present invention is characterized by comprising a control circuit that sends a control signal to the first detection circuit to select a lower reference voltage when the first detection circuit sends out a detection signal within a predetermined time after driving the heavy load. Power battery life detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11881790U JP2510224Y2 (en) | 1990-11-15 | 1990-11-15 | Power supply battery life detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11881790U JP2510224Y2 (en) | 1990-11-15 | 1990-11-15 | Power supply battery life detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0475977U true JPH0475977U (en) | 1992-07-02 |
| JP2510224Y2 JP2510224Y2 (en) | 1996-09-11 |
Family
ID=31866782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11881790U Expired - Lifetime JP2510224Y2 (en) | 1990-11-15 | 1990-11-15 | Power supply battery life detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2510224Y2 (en) |
-
1990
- 1990-11-15 JP JP11881790U patent/JP2510224Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2510224Y2 (en) | 1996-09-11 |
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