Patent ID: 9279843
Filing Date: 2016-03-08
CPC Classification: G01R

Claim Text:
1. A charge transfer circuit for capacitive sensing, comprising: a variable capacitor disposed between an output terminal of an X-drive line and an input terminal of a Y-drive line; an X-drive unit connected between an input terminal of the X-drive line and a voltage input terminal; and an active output voltage feedback (AVF) part connected between an output terminal of the Y-drive line and a voltage output terminal; wherein an output terminal of the AVF part is connected to the output terminal of the Y-drive line, wherein each of the X-drive line and the Y-drive line comprises: a parasitic resistor configured such that an output or input terminal thereof is connected to the variable capacitor; and a parasitic capacitor configured such that an input terminal thereof is connected to an input or output terminal of the parasitic resistor.