JPS56145773A - Dc negative voltage generating circuit - Google Patents

Dc negative voltage generating circuit

Info

Publication number
JPS56145773A
JPS56145773A JP4684280A JP4684280A JPS56145773A JP S56145773 A JPS56145773 A JP S56145773A JP 4684280 A JP4684280 A JP 4684280A JP 4684280 A JP4684280 A JP 4684280A JP S56145773 A JPS56145773 A JP S56145773A
Authority
JP
Japan
Prior art keywords
voltage
transistor
turned
negative voltage
power source
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
JP4684280A
Other languages
Japanese (ja)
Inventor
Masaaki Hoashi
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 JP4684280A priority Critical patent/JPS56145773A/en
Publication of JPS56145773A publication Critical patent/JPS56145773A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps

Abstract

PURPOSE:To obtain a negative voltage higher than the voltage of a DC power source by connecting a transistor which turns ON and OFF in a half period, a charge supplying capacitor and a diode each other. CONSTITUTION:When a transistor Q1 is turned on and a transistor Q2 is turned off, the voltage VC1 approximately equal to the voltage E of a DC power source is charged in a capacitor C1. When the transistor Q1 is turned off and the transistor Q2 is turned off in the next period, the voltage obtained by superposing the charging voltage VC1 to the voltage E is charged in a capacitor C2, thereby obtaining the voltage having approximately double of the voltage of the power source. Thus, the voltage VC2 can be obtained with the positive polarity as reference voltage O volt and the terminal D as negative polarity.
JP4684280A 1980-04-11 1980-04-11 Dc negative voltage generating circuit Pending JPS56145773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4684280A JPS56145773A (en) 1980-04-11 1980-04-11 Dc negative voltage generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4684280A JPS56145773A (en) 1980-04-11 1980-04-11 Dc negative voltage generating circuit

Publications (1)

Publication Number Publication Date
JPS56145773A true JPS56145773A (en) 1981-11-12

Family

ID=12758587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4684280A Pending JPS56145773A (en) 1980-04-11 1980-04-11 Dc negative voltage generating circuit

Country Status (1)

Country Link
JP (1) JPS56145773A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010003470A1 (en) * 2008-07-08 2010-01-14 Sony Ericsson Mobile Communications Ab A circuit for generating a negative voltage supply signal, and associated power supply device and portable electronic apparatus
JP2017077112A (en) * 2015-10-15 2017-04-20 Tdk株式会社 Switch driving device and switch driving method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49105127A (en) * 1973-02-14 1974-10-04

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49105127A (en) * 1973-02-14 1974-10-04

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010003470A1 (en) * 2008-07-08 2010-01-14 Sony Ericsson Mobile Communications Ab A circuit for generating a negative voltage supply signal, and associated power supply device and portable electronic apparatus
JP2017077112A (en) * 2015-10-15 2017-04-20 Tdk株式会社 Switch driving device and switch driving method

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