Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
October 25, 2022
Patent Application Number
17019573
Date Filed
September 14, 2020
Patent Citations
Patent Primary Examiner
Provided is a capacitance detection circuit, which has better detection performance. The capacitance detection circuit includes: a first charging and discharging circuit configured to perform charging or discharging on a capacitor to be detected; a second charging and discharging circuit configured to perform charging or discharging on a calibration capacitor; an analog-to-digital conversion circuit configured to continuously sample a voltage difference between the capacitor to be detected and the calibration capacitor in a charging or discharging process to obtain sampled data; and a digital processing circuit configured to detect a capacitance of the capacitor to be detected according to the sampled data.
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