JPS63181964U - - Google Patents
Info
- Publication number
- JPS63181964U JPS63181964U JP7274287U JP7274287U JPS63181964U JP S63181964 U JPS63181964 U JP S63181964U JP 7274287 U JP7274287 U JP 7274287U JP 7274287 U JP7274287 U JP 7274287U JP S63181964 U JPS63181964 U JP S63181964U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- collector
- base
- emitter
- switching
- 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 5
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Electronic Switches (AREA)
Description
第1図は本考案の電源オン/オフ検出回路の一
実施例及びミユート回路の要部を示す回路図、第
2図は従来の電源オン/オフ検出回路及びミユー
ト回路の要部を示す回路図、第3図及び第4図は
第2図図示の回路の動作説明用電圧波形図である
。
1……電源オン/オフ検出回路、2……バツテ
リ、C1,C2……コンデンサ、D1……ツエナ
ーダイオード、D2……ダイオード、Q1〜Q3
,Q5,Q6,Q8,Q9……NPNトランジス
タ、Q4……デジタルトランジスタ、Q7……P
NPトランジスタ、R1〜R17……抵抗、S1
,S2……スイツチ。
Fig. 1 is a circuit diagram showing an embodiment of the power on/off detection circuit of the present invention and main parts of a mute circuit, and Fig. 2 is a circuit diagram showing main parts of a conventional power on/off detection circuit and a mute circuit. , 3 and 4 are voltage waveform diagrams for explaining the operation of the circuit shown in FIG. 2. 1...Power on/off detection circuit, 2...Battery, C1 , C2 ...Capacitor, D1...Zener diode, D2 ... Diode, Q1 to Q3
, Q 5 , Q 6 , Q 8 , Q 9 ... NPN transistor, Q 4 ... digital transistor, Q 7 ... P
NP transistor, R1 to R17 ...Resistance, S1
, S 2 ... switch.
Claims (1)
の分圧抵抗を介してベースに接続されると共に、
第2の直流電源ラインがコレクタに接続され、か
つエミツタが接地された電圧検出用の第1のトラ
ンジスタと、この第1のトランジスタのコレクタ
がベースに接続されると共にエミツタが接地され
た前記第1のトランジスタと同極性のスイツチン
グ用の第2のトランジスタと、前記第1のトラン
ジスタのベースが第2の分圧抵抗を介してコレク
タに接続されると共にエミツタが接地された前記
第1のトランジスタと同極性の分圧抵抗切換用の
第3のトランジスタと、この第3のトランジスタ
のベースがコレクタに接続されると共に前記第2
のトランジスタのコレクタがベースに接続され、
かつ前記第2の直流電源ラインがエミツタに接続
された前記第3のトランジスタをドライブするた
めの前記第1のトランジスタと逆極性の第4のト
ランジスタと、前記第2のトランジスタのコレク
タがカソードに接続されると共にアノードが外部
回路に接続されたダイオードとより構成したこと
を特徴とする電源オン/オフ検出回路。 A first DC power line having a switch is a first
is connected to the base through a voltage dividing resistor, and
a first transistor for voltage detection, the collector of which is connected to a second DC power supply line and whose emitter is grounded; and the first transistor whose collector is connected to its base and whose emitter is grounded; a second transistor for switching having the same polarity as the transistor; and a second transistor for switching having the same polarity as the first transistor, the base of which is connected to the collector via a second voltage dividing resistor, and the emitter of which is the same as the first transistor. a third transistor for switching the polarity dividing resistor; the base of the third transistor is connected to the collector;
The collector of the transistor is connected to the base,
and a fourth transistor having a polarity opposite to that of the first transistor for driving the third transistor, the emitter of which is connected to the second DC power supply line, and the collector of the second transistor is connected to the cathode. 1. A power on/off detection circuit comprising a diode having an anode connected to an external circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7274287U JPH0537250Y2 (en) | 1987-05-15 | 1987-05-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7274287U JPH0537250Y2 (en) | 1987-05-15 | 1987-05-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63181964U true JPS63181964U (en) | 1988-11-24 |
JPH0537250Y2 JPH0537250Y2 (en) | 1993-09-21 |
Family
ID=30916467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7274287U Expired - Lifetime JPH0537250Y2 (en) | 1987-05-15 | 1987-05-15 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0537250Y2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015182658A1 (en) * | 2014-05-30 | 2015-12-03 | 三菱電機株式会社 | Circuit for driving electrical-power semiconductor element |
-
1987
- 1987-05-15 JP JP7274287U patent/JPH0537250Y2/ja not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015182658A1 (en) * | 2014-05-30 | 2015-12-03 | 三菱電機株式会社 | Circuit for driving electrical-power semiconductor element |
JP5989265B2 (en) * | 2014-05-30 | 2016-09-07 | 三菱電機株式会社 | Power semiconductor device drive circuit |
US10038438B2 (en) | 2014-05-30 | 2018-07-31 | Mitsubishi Electric Corporation | Power semiconductor element driving circuit |
Also Published As
Publication number | Publication date |
---|---|
JPH0537250Y2 (en) | 1993-09-21 |