Capacitance detection apparatus, driving method for the same, fingerprint sensor, and biometric authentication apparatus

A capacitance detection device, comprising:

• a plurality of capacitance detection circuits that output detection signals to signal transmitting paths;
• a plurality of transistors each of which controls an electrical connection between one signal transmitting path of a plurality of transmitting paths and a global data line, the detection signals being supplied to the global data line through the plurality of transistors during a first period;
• a reset signal being supplied to each of the signal transmitting paths through one of the plurality of transistors during a second period;
• and
• a reset period setting device that sets a ratio between a reset period during which the resetting circuit resets the potential of each of the sianal transmitting paths and a sensing period during which the capacitance detection circuits output the detection sianals to the signal transmitting paths.

A capacitance detection device comprising:

• a plurality of data lines;
• a plurality of scan lines;
• a resetting circuit that resets a potential of each of the plurality of data lines;
• and
• a plurality of capacitance detection circuits,
• each of the plurality of detection circuits including:
• a selecting transistor whose gate receives a scan signal supplied from one scan line of the plurality of scan lines, the selecting transistor having a first terminal that is coupled to one data line of the plurality of data lines, a second terminal, and a channel region disposed between the first terminal and the second terminal;
• a signal amplifying transistor that is coupled to the second terminal;
• and
• a sensor electrode that is coupled to a gate of the signal amplifying transistor.