JPS6381262U - - Google Patents
Info
- Publication number
- JPS6381262U JPS6381262U JP17649386U JP17649386U JPS6381262U JP S6381262 U JPS6381262 U JP S6381262U JP 17649386 U JP17649386 U JP 17649386U JP 17649386 U JP17649386 U JP 17649386U JP S6381262 U JPS6381262 U JP S6381262U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- supply voltage
- circuit
- zener diode
- 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
- 230000010356 wave oscillation Effects 0.000 claims 2
- 239000004973 liquid crystal related substance Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Description
第１図は本考案に係る電圧不足警報回路の一実
施例を示す回路図、第２図は従来の電源オン表示
回路の一例を示す回路図である。
ＩＣ１〜ＩＣ４……ＮＯＲ回路、Ｒ１〜Ｒ６…
…抵抗、Ｃ１……コンデンサ、ＺＤ１……ツエナ
ーダイオード、ＤＰ……ＬＣＤ。
FIG. 1 is a circuit diagram showing an embodiment of a voltage shortage alarm circuit according to the present invention, and FIG. 2 is a circuit diagram showing an example of a conventional power-on display circuit. IC1 to IC4 ...NOR circuit, R1 to R6 ...
...Resistor, C 1 ... Capacitor, ZD 1 ... Zener diode, DP... LCD.
Claims (1)
電源投入時に抵抗を介して電源電圧が印加される
ツエナーダイオードと、方形波発振回路と、前記
ツエナーダイオードの両端間電圧と前記方形波発
振回路の出力電圧を入力とし、電源電圧に応じて
変化するスレツシユホールド電圧を基に論理動作
を行つて電源電圧のレベルを判別する論理回路と
、この論理回路の出力でオン、オフを制御される
液晶表示素子とを備えてなることを特徴とする電
圧不足警報回路。 In electronic devices that have batteries or rechargeable power sources,
A Zener diode to which a power supply voltage is applied via a resistor when the power is turned on, a square wave oscillation circuit, the voltage across the Zener diode and the output voltage of the square wave oscillation circuit as inputs, and changes according to the power supply voltage. A voltage characterized by comprising: a logic circuit that performs a logical operation based on a threshold voltage to determine the level of a power supply voltage; and a liquid crystal display element whose ON and OFF states are controlled by the output of this logic circuit. Shortage alarm circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17649386U JPS6381262U (en) | 1986-11-17 | 1986-11-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17649386U JPS6381262U (en) | 1986-11-17 | 1986-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6381262U true JPS6381262U (en) | 1988-05-28 |
Family
ID=31116790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17649386U Pending JPS6381262U (en) | 1986-11-17 | 1986-11-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6381262U (en) |
-
1986
- 1986-11-17 JP JP17649386U patent/JPS6381262U/ja active Pending
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