发明授权
- 专利标题： Circuit for driving a heater at a constant power
- 专利标题（中）： 以恒定功率驱动加热器的电路
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申请号： US09851112申请日： 2001-05-09
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公开(公告)号： US06548786B2公开(公告)日： 2003-04-15
- 发明人: Takashi Takizawa , Hiroshi Nishida
- 申请人： Takashi Takizawa , Hiroshi Nishida
- 优先权： JP2000-141784 20000515
- 主分类号： H05B102
- IPC分类号： H05B102
摘要：
A current-limiting resistor is connected between a power-supply line and a heater provided near the oxygen-detecting element of limiting-current type oxygen sensor. A power MOSFET is connected between the heater and a ground line. The resistor and the heater have such resistances that a current I2 flowing through the resistor and the heater when the heater has a resistance R2 is about I1{square root over ((R1/R2))}, where I1 is a current flowing through the resistor and the heater when the heater has a resistance R1.
公开/授权文献
- US20010050279A1 Circuit for driving a heater at a constant power 公开/授权日：2001-12-13