Abstract: A touch sensor circuit and a touch device are provided. The touch sensor circuit includes a charging capacitor, a first current supplying unit, a second current supplying unit, and a switch unit. Wherein, the charging capacitor is serially connected between a detecting terminal and a reference voltage. The first current supplying unit is coupled to the detecting terminal, and receives a first bias voltage signal, and generates a first charging current at the detecting terminal according to the first bias voltage signal. A second current supplying unit is coupled to the detecting terminal, and receives a second bias voltage signal, and generates a second charging current at the detecting terminal according to the second bias voltage signal. The second terminal and the third terminal of the switch respectively supply the first and the second bias voltage signal.

Abstract: The present invention discloses a sensing circuit including a sensing device, a first amplifier circuit, a high-pass filter, a second amplifier circuit and a determination circuit. The sensing device produces a sensing signal. The first amplifier circuit reduces high-frequency components of the sensing signal and amplifies low-frequency components of the sensing signal to produce a first amplified signal. The high-pass filter removes the direct current of the first amplified signal to produce a filtered signal. The second amplifier amplifies low-frequency components of the filtered signal according to a first predetermined voltage to produce a second amplified signal. The determination circuit determines whether the second amplified signal is higher than a second predetermined voltage and lower than a third predetermined voltage, and produces a detection result when the second amplified signal is higher than the second predetermined voltage or lower than the third predetermined voltage.

Abstract: A touch sensor circuit and a touch device are provided. The touch sensor circuit includes a charging capacitor, a first current supplying unit, a second current supplying unit, and a switch unit. Wherein, the charging capacitor is serially connected between a detecting terminal and a reference voltage. The first current supplying unit is coupled to the detecting terminal, and receives a first bias voltage signal, and generates a first charging current at the detecting terminal according to the first bias voltage signal. A second current supplying unit is coupled to the detecting terminal, and receives a second bias voltage signal, and generates a second charging current at the detecting terminal according to the second bias voltage signal. The second terminal and the third terminal of the switch respectively supply the first and the second bias voltage signal.