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US07864495B2 Excess voltage protection circuit, method of protecting a circuit from excess voltage, and semiconductor apparatus having the excess voltage protection circuit 失效
过电压保护电路，保护电路免受过电压的影响，以及具有过电压保护电路的半导体装置

  • Patent Title: Excess voltage protection circuit, method of protecting a circuit from excess voltage, and semiconductor apparatus having the excess voltage protection circuit
  • Patent Title (中): 过电压保护电路，保护电路免受过电压的影响，以及具有过电压保护电路的半导体装置
  • Application No.: US12063006
    Application Date: 2007-05-15
  • Publication No.: US07864495B2
    Publication Date: 2011-01-04
  • Inventor: Tadayoshi Ueda
  • Applicant: Tadayoshi Ueda
  • Applicant Address: JP Tokyo
  • Assignee: Ricoh Company, Ltd.
  • Current Assignee: Ricoh Company, Ltd.
  • Current Assignee Address: JP Tokyo
  • Agency: Dickstein Shapiro LLP
  • Priority: JP2006-157454 20060606
  • International Application: PCT/JP2007/060322 WO 20070515
  • International Announcement: WO2007/142015 WO 20071213
  • Main IPC: H02H9/00
  • IPC: H02H9/00 ;  H02H3/20
Excess voltage protection circuit, method of protecting a circuit from excess voltage, and semiconductor apparatus having the excess voltage protection circuit
Abstract:
In a disclosed excess voltage protection circuit, when the input voltage equal to or higher than a predetermined maximum voltage is detected by an excess voltage detection circuit, a switching element is shut off so as to prevent the input voltage being output from the excess voltage protection circuit. A voltage obtained by dividing the input voltage using resistors is output from the excess voltage protection circuit.
Abstract(Chinese):

在公开的过电压保护电路中，当过电压检测电路检测到等于或高于预定最大电压的输入电压时，切换元件被切断，以防止输入电压从过电压保护输出 电路。 从过电压保护电路输出通过使用电阻器分压输入电压而获得的电压。

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