Title:
チャージポンプ回路
Document Type and Number:
Japanese Patent JP5078464
Kind Code:
B2
Abstract:
A reversal charge pump circuit generates a negative voltage from an input voltage received from an input terminal, and provides an output terminal with the negative voltage. The charge pump circuit achieves increased voltage stability and avoids breakdown voltage problems, with an uncomplicated structure. The circuit may have first and second capacitors, first through fourth switches, and a voltage control circuit. The voltage control circuit controls the voltage provided to the first capacitor. The switches are on/off controlled by signals from a control circuit.
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Inventors:
Toshinori Tanaka
Application Number:
JP2007172311A
Publication Date:
November 21, 2012
Filing Date:
June 29, 2007
Export Citation:
Assignee:
株式会社リコー
International Classes:
H02M3/07
Domestic Patent References:
| JP2005312169A | ||||
| JP2003219634A |
Foreign References:
| WO2006061952A1 |
Attorney, Agent or Firm:
Mitsuo Tanaka
Kyousei Tamura
Masahiro Ishino
Kyousei Tamura
Masahiro Ishino