Abstract: Embodiments of the present disclosure provide a force detection apparatus and method, a touch device and an electronic terminal. The apparatus includes: a first detection capacitor, and a second detection capacitor configured to perform differential processing for a capacitance of the first detection capacitor to cancel an interference signal; wherein the first detection capacitor includes a force detection electrode, and the second detection capacitor includes a reference detection electrode, the force detection electrode and the reference detection electrode being arranged within a surface, such that the first detection capacitor and the second detection capacitor are simultaneously coupled to the interference signal causing interference to force detection, and differential processing is performed for capacitances of the first detection capacitor and the second detection capacitor.

Abstract: A capacitance sensing circuit includes: a front-end circuit, a first subtracting and summing circuit and a capacitance judging circuit; wherein the front-end circuit is coupled to the detection circuit; the first subtracting and summing circuit is coupled between the front-end circuit and the capacitance judging circuit, and includes: a subtracting unit; a summing unit, coupled to the subtracting unit; a first converter, coupled between the summing unit and the capacitance judging unit; and a second converter, coupled between the first converter and the subtracting unit; and the capacitance judging circuit is configured to judge a capacitance change of the detection capacitor. According to the present application, resistance against noise may be improved.

Abstract: A self-capacitance touch detection circuit includes a signal generator, a first amplifier, a cancellation signal generator and an analog-to-digital converter. The signal generator generates a driving signal and then the driving signal is divided into a first output branch and a second output branch, the first output branch being connected to the cancellation signal generator, a signal passing through an offset circuit being output to a first input terminal of the amplifier, and the second output branch being respectively connected to a touch panel and a second input terminal of the amplifier; the amplifier outputs a signal to the analog-to-digital converter; and the analog-to-digital converter converts the signal into a digital signal and sends the digital signal to a main controller.

Abstract: Embodiments of the present disclosure provide a force detection apparatus and method, a touch device and an electronic terminal. The apparatus includes: a first detection capacitor, and a second detection capacitor configured to perform differential processing for a capacitance of the first detection capacitor to cancel an interference signal; wherein the first detection capacitor includes a force detection electrode, and the second detection capacitor includes a reference detection electrode, the force detection electrode and the reference detection electrode being arranged within a surface, such that the first detection capacitor and the second detection capacitor are simultaneously coupled to the interference signal causing interference to force detection, and differential processing is performed for capacitances of the first detection capacitor and the second detection capacitor.

Abstract: A capacitance sensing circuit includes: a front-end circuit, a first subtracting and summing circuit and a capacitance judging circuit; wherein the front-end circuit is coupled to the detection circuit; the first subtracting and summing circuit is coupled between the front-end circuit and the capacitance judging circuit, and includes: a subtracting unit; a summing unit, coupled to the subtracting unit; a first converter, coupled between the summing unit and the capacitance judging unit; and a second converter, coupled between the first converter and the subtracting unit; and the capacitance judging circuit is configured to judge a capacitance change of the detection capacitor. According to the present application, resistance against noise may be improved.

Abstract: A self-capacitance touch detection circuit includes a signal generator, a first amplifier, a cancellation signal generator and an analog-to-digital converter. The signal generator generates a driving signal and then the driving signal is divided into a first output branch and a second output branch, the first output branch being connected to the cancellation signal generator, a signal passing through an offset circuit being output to a first input terminal of the amplifier, and the second output branch being respectively connected to a touch panel and a second input terminal of the amplifier; the amplifier outputs a signal to the analog-to-digital converter; and the analog-to-digital converter converts the signal into a digital signal and sends the digital signal to a main controller.