JPS56128023A - Electronic switchgear - Google Patents

Electronic switchgear

Info

Publication number
JPS56128023A
JPS56128023A JP3145780A JP3145780A JPS56128023A JP S56128023 A JPS56128023 A JP S56128023A JP 3145780 A JP3145780 A JP 3145780A JP 3145780 A JP3145780 A JP 3145780A JP S56128023 A JPS56128023 A JP S56128023A
Authority
JP
Japan
Prior art keywords
emitter
switchgear
fet8
high frequency
circuit
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
Application number
JP3145780A
Other languages
Japanese (ja)
Other versions
JPH0120809B2 (en
Inventor
Mikio Takagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KYOSHIN DENKI SEISAKUSHO KK
Original Assignee
KYOSHIN DENKI SEISAKUSHO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KYOSHIN DENKI SEISAKUSHO KK filed Critical KYOSHIN DENKI SEISAKUSHO KK
Priority to JP3145780A priority Critical patent/JPS56128023A/en
Publication of JPS56128023A publication Critical patent/JPS56128023A/en
Publication of JPH0120809B2 publication Critical patent/JPH0120809B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching

Abstract

PURPOSE:To make the on and off operation execute sharply even in case of the electric power source which has full-wave-rectified high frequency, by inserting a diode into at least one of the emitter circuit and the collector circuit of a transistor. CONSTITUTION:In the electronic switchgear S, a diode 4 is inserted into the emitter circuit of the Tr3 in order to stop a leakage current by the electrostatic capacity between the base and emitter on the transistor Tr3, which becomes a problem due to the fact that the AC power source 1 is high frequency. And now, when the AC power source 1 of high frequency is full-wave-rectified and connected to the switchgear S, a current flows into the base circuit of the Tr3 through the drain-source of the FET8, therefore the Tr3 becomes in conduction. After that, charging voltage of the electrolytic capacitor 9 instantaneously exceeds pitch-off voltage of the FET8, and the FET8 becomes off. After the Tr3 has turned off, a leakage current by the electrostatic capacity between the base and emitter of the Tr3 is stopped by a characteristic of rectification of the switching diode 4 having a speed which matches switching of the Tr3, and the switchgear S turns off sharply.
JP3145780A 1980-03-11 1980-03-11 Electronic switchgear Granted JPS56128023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3145780A JPS56128023A (en) 1980-03-11 1980-03-11 Electronic switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3145780A JPS56128023A (en) 1980-03-11 1980-03-11 Electronic switchgear

Publications (2)

Publication Number Publication Date
JPS56128023A true JPS56128023A (en) 1981-10-07
JPH0120809B2 JPH0120809B2 (en) 1989-04-18

Family

ID=12331778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3145780A Granted JPS56128023A (en) 1980-03-11 1980-03-11 Electronic switchgear

Country Status (1)

Country Link
JP (1) JPS56128023A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6141217A (en) * 1984-08-01 1986-02-27 Makoto Aso Delay circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6141217A (en) * 1984-08-01 1986-02-27 Makoto Aso Delay circuit

Also Published As

Publication number Publication date
JPH0120809B2 (en) 1989-04-18

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