Title:
容量検出装置、抵抗検出装置
Document Type and Number:
Japanese Patent JP6871836
Kind Code:
B2
Abstract:
To increase the accuracy of a capacitance detector and a resistance detector.SOLUTION: A capacitance detector and a resistance detector of the present invention comprise an oscillation unit, a first differentiation unit, a second differentiation unit, a differential amplification unit, a control unit, an integration unit, and a sample-and-hold unit. The first differentiation unit generates a first differential signal derived by differentiating an oscillation signal using a first capacitance sensor or a first resistance sensor. The second differentiation unit generates a second differential signal derived by differentiating an oscillation signal using a second capacitance sensor or a second resistance sensor. The differential amplification unit generates a differential amplification signal that corresponds to a difference between the absolute value of the first differential signal and the absolute value of the second differential signal. The integration unit generates an integration signal derived by integrating the differential amplification signal, and resets the integration signal in accordance with an integration control signal.SELECTED DRAWING: Figure 1
Inventors:
Shintaro Ichikawa
Application Number:
JP2017190629A
Publication Date:
May 12, 2021
Filing Date:
September 29, 2017
Export Citation:
Assignee:
Japan Aviation Electronics Industry Co., Ltd.
International Classes:
G01R27/26; G01R27/02
Domestic Patent References:
| JP2011214923A | ||||
| JP2012181143A | ||||
| JP9243397A |
Foreign References:
| US5777482 |
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Yoshimura Munehiro
Yukio Nakamura
Yoshimura Munehiro