Capacitance detection device and input device

A capacitance detection device for detecting a capacitance between an object proximate to a detection electrode and the detection electrode, the capacitance detection device comprising:

• a first voltage output circuit configured to output a first alternating current voltage supplied to a shield electrode disposed proximate to the detection electrode;
• a second voltage output circuit configured to output a second alternating current voltage, frequency and phase of the second alternating current voltage being equal to those of the first alternating current voltage and amplitude of the second alternating current voltage being less than that of the first alternating current voltage;
• and
• a current output circuit configured to output a drive current to the detection electrode so that a voltage difference between a voltage of the detection electrode and the second alternating current voltage is reduced, and output a detection signal corresponding to the drive current, wherein
• the second voltage output circuit outputs the second alternating current voltage with amplitude adjusted so that the drive current becomes zero in the absence of the object proximate to the detection electrode.