Sensor device and driving method thereof

A sensor device comprising:

• a plurality of first sensors receiving a plurality of driving signals;
• a plurality of second sensors outputting a plurality of sensing signals in response to the driving signals;
• and
• a sensor receiver receiving the sensing signals from the second sensors, and including a band pass filter filtering the sensing signals,
• wherein the band pass filter includes:
• a multi-path filter in which a frequency of the driving signals is set as a center frequency;
• a gain amplifier amplifying signals filtered through the multi-path filter according to a predetermined gain value;
• and
• a buffer isolating the multi-path filter and the gain amplifier from each other, and
• wherein the multi-path filter includes a plurality of paths connected in parallel between a common input terminal and a common output terminal.

A driving method of a sensor device comprising:

• supplying driving signals to a plurality of first sensors;
• receiving sensing signals from two adjacent second sensors;
• amplifying, by a single charge amplifier, a difference between the sensing signals from two of the second sensors to generate an amplified signal;
• and
• filtering the amplified signal through a band pass filter,
• wherein the band pass filter includes:
• a multi-path filter in which a frequency of the driving signals is set as a center frequency;
• a gain amplifier amplifying signals filtered through the multi-path filter according to a predetermined gain value;
• and
• a buffer isolating the multi-path filter and the gain amplifier from each other.