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发明申请
US20070001744A1 Switched current temperature sensing circuit and method to correct errors due to beta and series resistance 有权
开关电流温度检测电路和纠正β和串联电阻误差的方法

  • 专利标题： Switched current temperature sensing circuit and method to correct errors due to beta and series resistance
  • 专利标题（中）： 开关电流温度检测电路和纠正β和串联电阻误差的方法
  • 申请号： US11170970
    申请日： 2005-06-29
  • 公开(公告)号： US20070001744A1
    公开(公告)日： 2007-01-04
  • 发明人: Evaldo Miranda , A. Brokaw
  • 申请人： Evaldo Miranda , A. Brokaw
  • 专利权人： ANALOG DEVICES, INC.
  • 当前专利权人： ANALOG DEVICES, INC.
  • 主分类号： H01L35/00
  • IPC分类号： H01L35/00
Switched current temperature sensing circuit and method to correct errors due to beta and series resistance
摘要：
A switched current temperature sensing circuit comprises a BJT arranged to conduct a forced emitter current IE of the form Ifixed+(Ifixed/β), such that the base current is given by Ifixed/β and the collector current is given by Ifixed+(Ifixed/β)−(Ifixed/β)=Ifixed. Base current Ifixed/β is mirrored to the emitter, and a current source provides current Ifixed, which is switched between at least a first value I and a second value N*I such that the BJT's base-emitter voltage has a first value Vbe1 when Ifixed=I and a second value Vbe2 when Ifixed=N*I, such that: ΔVbe12=Vbe1−Vbe2=(nFkT/q)(ln N), where nF is the BJT's emission coefficient, k is Boltzmann's constant, T is absolute temperature, and q is the electron charge.
摘要（中）：

开关电流温度检测电路包括布置成传导形式为固定的固体的强制发射极电流I B的BJT（固定的/ ），使得基极电流由I固定 /β给出，并且集电极电流由I固定 ） - （I <固定 /β）= I固定。 基极电流I <固定 /β被镜像到发射极，并且电流源提供电流I <固定，其在至少第一值I和第二值N之间切换 * I，使得当I固定 = I时，BJT的基极 - 发射极电压具有第一值V sub1n1，并且当I 固定 = N * I，使得：<？in-line-formula description =“In-line Formulas”end =“lead”？> DeltaV = （ln N），<？in-line-formula description =“In-line-formula” 公式“end =”tail“？>其中n 是BJT的发射系数，k是玻耳兹曼常数，T是绝对温度，q是电子电荷。

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