发明授权
US06465996B2 Constant voltage circuit with a substitute circuit in case of input voltage lowering
有权
在输入电压降低的情况下，带有替代电路的恒压电路
- 专利标题： Constant voltage circuit with a substitute circuit in case of input voltage lowering
- 专利标题（中）： 在输入电压降低的情况下，带有替代电路的恒压电路
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申请号： US09799106申请日： 2001-03-06
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公开(公告)号： US06465996B2公开(公告)日： 2002-10-15
- 发明人: Junichi Nagata , Kiyoshi Yamamoto , Hirokazu Itakura , Masahiro Kitagawa , Hiroyuki Ban , Hiroyuki Kawabata , Shinichi Maeda
- 申请人： Junichi Nagata , Kiyoshi Yamamoto , Hirokazu Itakura , Masahiro Kitagawa , Hiroyuki Ban , Hiroyuki Kawabata , Shinichi Maeda
- 优先权： JP2000-063723 20000308; JP2000-120827 20000421; JP2000-367205 20001201
- 主分类号： G05F316
- IPC分类号： G05F316
摘要：
A constant voltage circuit robust to the input voltage lowering is disclosed. The invention is applied to a constant voltage circuit fed with an input voltage through first and second power conductors for transferring the input voltage to a load as an output voltage through an output transistor. An inventive constant voltage circuit is provided with a substitute circuit, responsive to a detection of the lowing of the input voltage to a predetermined voltage, for providing a substitute output path that is connected in parallel with the output transistor. Doing this minimize the degree of lowering of the second voltage due to the lowering of said first voltage. The output transistor may be nay of NPN and PNP transistors and P-type and N-type MOS FETs.