JPS5660460A - High voltage generating circuit - Google Patents

High voltage generating circuit

Info

Publication number
JPS5660460A
JPS5660460A JP13682879A JP13682879A JPS5660460A JP S5660460 A JPS5660460 A JP S5660460A JP 13682879 A JP13682879 A JP 13682879A JP 13682879 A JP13682879 A JP 13682879A JP S5660460 A JPS5660460 A JP S5660460A
Authority
JP
Japan
Prior art keywords
capacitor
voltage
turned
circuit
time constant
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
JP13682879A
Other languages
Japanese (ja)
Other versions
JPS6014582B2 (en
Inventor
Hiroyuki Kawataki
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.)
YAHATA DENKI SEISAKUSHO KK
YAHATA ELECTRIC WORKS
Original Assignee
YAHATA DENKI SEISAKUSHO KK
YAHATA ELECTRIC WORKS
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 YAHATA DENKI SEISAKUSHO KK, YAHATA ELECTRIC WORKS filed Critical YAHATA DENKI SEISAKUSHO KK
Priority to JP54136828A priority Critical patent/JPS6014582B2/en
Publication of JPS5660460A publication Critical patent/JPS5660460A/en
Publication of JPS6014582B2 publication Critical patent/JPS6014582B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Control Or Security For Electrophotography (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To stop the oscillation operation of the inverter to prevent the damage of circuit elements when high-voltage discharge pulses are generated continuously in the secondary-side circuit, by connecting a resistance in parallel to the capacitor to constitute a time constant circuit for discharge.
CONSTITUTION: When the generation interval of high-voltage discharge pulses is larger than the time constant determined by capacitor 23 and resistance 29, switching transistor 24 is not turned on, and therefore, the oscillation operation continues still. When the generation interval of high-voltage discharge pulses is smaller than the time constant, the charging quantity of capacitor 23 is increased gradually; and if the voltage dependent upon this increment reaches the sum of the breakdown voltage of Zener diode 30 and the voltage between the base and the emitter which makes switching trasistor 24 turned on, charged electric charge of capacitor 23 forms the base current of transistor 24 at a time. Therefore, transistor is turned on from the turning-on state to stop oscillation of oscillating circuit 31, so that damage of circuit elements can be prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP54136828A 1979-10-22 1979-10-22 High voltage generation circuit Expired JPS6014582B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54136828A JPS6014582B2 (en) 1979-10-22 1979-10-22 High voltage generation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54136828A JPS6014582B2 (en) 1979-10-22 1979-10-22 High voltage generation circuit

Publications (2)

Publication Number Publication Date
JPS5660460A true JPS5660460A (en) 1981-05-25
JPS6014582B2 JPS6014582B2 (en) 1985-04-15

Family

ID=15184445

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54136828A Expired JPS6014582B2 (en) 1979-10-22 1979-10-22 High voltage generation circuit

Country Status (1)

Country Link
JP (1) JPS6014582B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7800180B2 (en) * 2006-06-29 2010-09-21 Mitsumi Electric Co., Ltd. Semiconductor electrostatic protection device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7800180B2 (en) * 2006-06-29 2010-09-21 Mitsumi Electric Co., Ltd. Semiconductor electrostatic protection device

Also Published As

Publication number Publication date
JPS6014582B2 (en) 1985-04-15

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