To improve sensitivity by using a modified shielding capacity of parasitic capacity
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United States of America Patent
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Aug 27, 2024
Grant Date -
Nov 30, 2023
app pub date -
Aug 11, 2023
filing date -
Feb 13, 2021
priority date (Note) -
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Abstract
The present invention involves driving multiple capacitors, including a shielding capacitance (Cin_sd), to minimize voltage fluctuations detected on the CDA signal line 200, thereby enhancing the resolution of the ADC. The additional capacitance (Cobj) generated between the CDA 100 and the object 20 due to the appearance of the object 20 is detected in the form of voltage. By analyzing with an ADC of improved resolution, it is possible to detect the presence of the object 20 more reliably.
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