Sensor device with sensor signal synchronized with a signal with reversed polarity from a signal supplied to a floating ground line

A sensor device comprising:

• a panel including an insulating layer, a first electrode provided on a first main surface side of the insulating layer, a second electrode provided on a second main surface side opposite a first main surface of the insulating layer and sandwiching the insulating layer together with the first electrode;
• and
• a control circuit including a first circuit including a timing control circuit and a first amplifier, and a second circuit including a detection circuit connected to a floating ground line and electrically isolated from the first circuit,
• the detection circuit including a detector electrically connected to the second electrode,
• during a first sensing drive period,
• the timing control circuit outputting a sixth synchronization signal and a seventh synchronization signal having a polarity inverted from the polarity of the sixth synchronization signal, respectively,
• the first amplifier amplifying the seventh synchronization signal, and providing the amplified seventh synchronization signal to each of the floating ground line and the first electrode, and
• the detector reading a change in a sensor signal generated at the second electrode in synchronization with the sixth synchronization signal.