JPS59176329U - Undervoltage detection circuit - Google Patents
Undervoltage detection circuitInfo
- Publication number
- JPS59176329U JPS59176329U JP7181783U JP7181783U JPS59176329U JP S59176329 U JPS59176329 U JP S59176329U JP 7181783 U JP7181783 U JP 7181783U JP 7181783 U JP7181783 U JP 7181783U JP S59176329 U JPS59176329 U JP S59176329U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- undervoltage detection
- transistor
- power supply
- base
- 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
- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の不足電圧検出回路を含む系統のブロック
図、第２図は同不足電圧検出回路の回路図、第３図はこ
の考案の一実施例による不足電圧検出回路を含む系統の
ブロック図、第４図は同不足電圧検出回路の回路図、第
５図は他の実施例を示す回路図である。
１・・・供給電源、３・・・装置、４・・・不足電圧検
出回路、５・・・出力、４０・・・コンデンサ、４１・
・・可変抵抗、４２．４３・・・抵抗、４４・・・ゼナ
ーダイオード、４５・・・トランジスタ、４６・・・リ
レーコイル、４７・・・リレー接点。なお、図中同一符
号は同−又は相当部分を示す。Fig. 1 is a block diagram of a system including a conventional undervoltage detection circuit, Fig. 2 is a circuit diagram of the same undervoltage detection circuit, and Fig. 3 is a block diagram of a system including an undervoltage detection circuit according to an embodiment of this invention. 4 are circuit diagrams of the same undervoltage detection circuit, and FIG. 5 is a circuit diagram showing another embodiment. DESCRIPTION OF SYMBOLS 1... Power supply, 3... Device, 4... Undervoltage detection circuit, 5... Output, 40... Capacitor, 41...
... Variable resistor, 42.43... Resistor, 44... Zener diode, 45... Transistor, 46... Relay coil, 47... Relay contact. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
抗分圧回路の出力端とトランジスタのベースとの間に接
続されたゼナーダイオードと、上記供給電源から上記ト
ランジスタを通して流れるコレクタ電流で励磁されるリ
レーコイルと、上記供給電源と上記トランジスタのベー
ス側との間に挿入され、電源投入時に上記リレーコイル
を励磁するのに必要なコレクタ電流を流すためのベース
電流を流すコンデンサとを備えたことを特徴きする不足
電圧検出回路。, a resistive voltage divider circuit that detects the voltage of the power supply, a zener diode connected between the output terminal of the resistor voltage divider circuit and the base of the transistor, and a collector current flowing from the power supply through the transistor to excite it. and a capacitor that is inserted between the power supply and the base side of the transistor and flows a base current for flowing a collector current necessary to excite the relay coil when the power is turned on. This is an undervoltage detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7181783U JPS59176329U (en) | 1983-05-12 | 1983-05-12 | Undervoltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7181783U JPS59176329U (en) | 1983-05-12 | 1983-05-12 | Undervoltage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59176329U true JPS59176329U (en) | 1984-11-26 |
Family
ID=30201970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7181783U Pending JPS59176329U (en) | 1983-05-12 | 1983-05-12 | Undervoltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59176329U (en) |
-
1983
- 1983-05-12 JP JP7181783U patent/JPS59176329U/en active Pending
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