发明名称 |
Sensor drive circuit |
摘要 |
A sensor drive circuit which accurately detects the amount of variation in inductance of a coil serving as a variable sensor. A peak detector circuit detects a peak value of a difference signal between a variable-amplitude signal and an intermediate signal to output a peak detection signal as a verification signal to a first input of an error amplifier. The error amplifier has a second input receiving a reference voltage and outputs a control signal to an AGC circuit on the basis of the result of comparison between the peak detection signal and the reference voltage. A peak detector circuit detects a peak value of a difference signal between the variable-amplitude signal and an inverted variable-amplitude signal to output the peak value as an inductance detection signal to the exterior. The AGC circuit performs automatic gain adjustment to output a signal of determined amplitude to a buffer in response to the control signal from the error amplifier.
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申请公布号 |
US5589778(A) |
申请公布日期 |
1996.12.31 |
申请号 |
US19950419697 |
申请日期 |
1995.04.11 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
ONO, YUKIO;KIKUYAMA, SEIICHIRO |
分类号 |
G01B7/00;G01D5/20;G01R27/26;(IPC1-7):G01R27/28 |
主分类号 |
G01B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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