JPS55100064A - Dc-dc converter - Google Patents

Dc-dc converter

Info

Publication number
JPS55100064A
JPS55100064A JP710879A JP710879A JPS55100064A JP S55100064 A JPS55100064 A JP S55100064A JP 710879 A JP710879 A JP 710879A JP 710879 A JP710879 A JP 710879A JP S55100064 A JPS55100064 A JP S55100064A
Authority
JP
Japan
Prior art keywords
transistor
output voltage
output
voltage
electric potential
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
Application number
JP710879A
Other languages
Japanese (ja)
Inventor
Kazuchika Urita
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP710879A priority Critical patent/JPS55100064A/en
Publication of JPS55100064A publication Critical patent/JPS55100064A/en
Pending legal-status Critical Current

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  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To simplify the constitution of the voltage control circuit by setting a method of stopping the oscillation circuit when the output voltage of the converter circuit reaches over a fixed value.
CONSTITUTION: When the blocking oscillation circuit 12 is oscillated by the output voltage of the direct current source 10, said oscillation output is half-wave rectified by the converter circuit 14 and smoothened. The output voltage V0 consists of an inversion polarity and rectifying output occurs between the output terminals T1 and T2. When this output voltage V0 is more than the sum of Zener voltage value of the Zener diode ZD and of the value of voltage drop between base emitters of a transistor Q2, said transistor Q2 is turned on and an electric potential of the connecting point of resistances R1 and R2, and in its turn the base electric potential of the transistor Q1 is forcedly allowed to be negative electric potential. Therefore, the blocking oscillation circuit 12 stops the oscillation operation, whereby the output voltage drops slowly and returns to the first step when the transistor Q2 is off.
COPYRIGHT: (C)1980,JPO&Japio
JP710879A 1979-01-26 1979-01-26 Dc-dc converter Pending JPS55100064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP710879A JPS55100064A (en) 1979-01-26 1979-01-26 Dc-dc converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP710879A JPS55100064A (en) 1979-01-26 1979-01-26 Dc-dc converter

Publications (1)

Publication Number Publication Date
JPS55100064A true JPS55100064A (en) 1980-07-30

Family

ID=11656885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP710879A Pending JPS55100064A (en) 1979-01-26 1979-01-26 Dc-dc converter

Country Status (1)

Country Link
JP (1) JPS55100064A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62239864A (en) * 1986-04-11 1987-10-20 Toshiba Corp Undervoltage detecting circuit for switching power source

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53133720A (en) * 1977-04-14 1978-11-21 Toko Inc Stabilized power supply circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53133720A (en) * 1977-04-14 1978-11-21 Toko Inc Stabilized power supply circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62239864A (en) * 1986-04-11 1987-10-20 Toshiba Corp Undervoltage detecting circuit for switching power source

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