Fingerprint sensor and terminal device

A terminal device, comprising a fingerprint sensor, the fingerprint sensor comprising a first drive circuit, a plurality of second drive circuits, and multiple columns of voltage integrators;

• wherein the first drive circuit is configured to generate a periodic driving signal according to a periodic first input signal, and periods of the first input signal and the driving signal are both a predetermined period,
• the first input signal is at a high level and the driving signal is a first voltage in a first time period of the predetermined period;
• the first input signal is at a low level and the driving signal is a second voltage in other time period of the predetermined period;
• both the first voltage and the second voltage are greater than zero, and the first voltage is smaller than the second voltage;
• each second drive circuit corresponds to a column of voltage integrators respectively, the each second drive circuit is configured to generate a column select signal according to a second input signal, and the column select signal is used for controlling an operating state of a corresponding column of voltage integrators,
• wherein when the second input signal is at a low level, the column select signal is the second voltage;
• and when the second input signal is at a high level, the column select signal is the first voltage;
• and
• each voltage integrator of the multiple columns of voltage integrators is configured to receive the driving signal and the column select signal generated by a corresponding second drive circuit, and charge or integrate a fingerprint capacitor according to the driving signal and the column select signal.