发明申请
US20100045268A1 COMPARATOR CIRCUIT HAVING LATCHING BEHAVIOR AND DIGITAL OUTPUT SENSORS THEREFROM 有权
具有锁存器的比较器电路和数字量输出传感器

  • 专利标题: COMPARATOR CIRCUIT HAVING LATCHING BEHAVIOR AND DIGITAL OUTPUT SENSORS THEREFROM
  • 专利标题(中): 具有锁存器的比较器电路和数字量输出传感器
  • 申请号: US12196979
    申请日: 2008-08-22
  • 公开(公告)号: US20100045268A1
    公开(公告)日: 2010-02-25
  • 发明人: Wayne Kilian
  • 申请人: Wayne Kilian
  • 申请人地址: US NJ Morristown
  • 专利权人: Honeywell International Inc.
  • 当前专利权人: Honeywell International Inc.
  • 当前专利权人地址: US NJ Morristown
  • 主分类号: G01B7/00
  • IPC分类号: G01B7/00 G01R19/00
COMPARATOR CIRCUIT HAVING LATCHING BEHAVIOR AND DIGITAL OUTPUT SENSORS THEREFROM
摘要:
A digital output sensor (110) includes a sensing structure (105) including at least one sensing element. The sensing structure (105) outputs a differential sensing signal (106, 107). An integrated circuit (100) includes a substrate (101) including signal conditioning circuitry for conditioning the sensing signal (106, 107). The signal conditioning circuitry includes a differential amplifier (115) coupled to receive the sensing signal and provide first and second differential outputs (116, 117), and a comparator (120) having input transistors (Q27, Q28) coupled to receive outputs from the differential amplifier. The comparator (120) also includes first and second current-mirror loads (Q19/Q21 and Q22/Q20) coupled to the input transistors (Q27, Q28) in a cross coupled configuration to provide hysteresis, wherein the first and second current-mirror loads provide differential drive currents (121,122). An output driver (125) is coupled to receive the differential drive currents (121, 122). An output stage (130) includes at least one output transistor which is coupled to the output driver for providing a digital output for the sensor. A voltage regulator (140) is coupled to receive a supply voltage (VS) and output at least one regulated supply voltage (VREG), wherein the regulated supply voltage is coupled to the sensing structure (105), the differential amplifier (115) and the comparator (120).
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