Patent ID: 9304644
Filing Date: 2016-04-05
CPC Classification: G06F,H03K

Claim Text:
1. Touch sensing system, comprising a signal generator (Tx), which is configured to provide an AC signal; a signal receiver (Rx), which is configured to perform a signal detection; a first transmitter node (T 1 ), which is connected to the signal generator (Tx) in a switchable fashion; a second transmitter node (T 2 ), which is connected to the first transmitter node (T 1 ) in a switchable fashion and to a reference potential terminal (GND) in a switchable fashion; a first receiver node (R 1 ), which is connected to the signal receiver (Rx) in a switchable fashion and to the first transmitter node (T 1 ) in a switchable fashion; a second receiver node (R 2 ), which is connected to the first receiver node (R 1 ) in a switchable fashion and to the reference potential terminal (GND) in a switchable fashion; a first electrode (E 1 ), which is connected to the second transmitter node (T 2 ); a second electrode (E 2 ), which is connected to the second receiver node (R 2 ); and a capacitance measurement circuit (CMC), which is coupled to the first transmitter node (T 1 ) and/or the second transmitter node (T 2 ), coupled to the first receiver node (R 1 ) and/or the second receiver node (R 2 ), and configured to measure respective capacitance values at the first transmitter node (T 1 ) or the second transmitter node (T 2 ) and at the first receiver node (R 1 ) or the second receiver node (R 2 ).