Abstract: The present application provides a touch sensing circuit, which comprises a plurality of analog front-end circuits, a noise processing circuit, and a compensation circuit. The analog front-end circuits generate a plurality of output signals according to a plurality of sensing signals. The noise processing circuit is coupled to the analog front-end circuits and generates an average noise according to the output signals. The compensation circuit is coupled to the noise processing circuit and compensates the output signals according to the average noise. By applying the touch sensing circuit of the present application, the influence of common-mode noise may be suppressed and the sensitivity of sensing touches may be improved.

Abstract: The present invention relates to a sensing circuit with signal compensation, which comprises a first sensing element, a second sensing element and a differential amplifying circuit, the differential amplifying circuit generates an output signal through a differential compensation according to a common mode voltage, a first sensing signal and a second sensing signal. Hereby, reducing the noise of the sensing circuit is achieved, and the interference of the display driving signal may be effectively improved.

Abstract: This disclosure provides a noise suppression circuit for suppressing a noise in a voltage signal. The noise suppression circuit comprises: a switch unit having a first terminal receiving the voltage signal and a second terminal; a capacitor having a first terminal connected to the first terminal of the switch unit and a second terminal grounded; and an analog front-end unit including an operational amplifier with a signal input terminal and a reference-voltage input terminal electrically connected to the second terminal of the switch unit; wherein the switch unit is controlled by a pulse signal.

Abstract: The present invention provides a touch circuit, which comprises a detection circuit and an emulation circuit. The detection circuit detects a detection signal; the emulation circuit includes a reference load and receives a signal. The emulation circuit generates an emulation signal according to the reference load and the signal. The touch circuit outputs a touch signal according to the detection signal and the emulation signal.

Abstract: The present invention provides a touch circuit, which comprises a detection circuit and an emulation circuit. The detection circuit detects a detection signal; the emulation circuit includes a reference load and receives a signal. The emulation circuit generates an emulation signal according to the reference load and the signal. The touch circuit outputs a touch signal according to the detection signal and the emulation signal.

Abstract: A calibration method for a capacitive sensing device is disclosed. The capacitive sensing device is capable of operating in a self-sensing mode or a mutual-sensing mode. The calibration method includes detecting a capacitance change of a panel in the self-sensing mode to generate a self-sensing output signal, detecting a capacitance change of the panel in the mutual-sensing mode to generate a mutual-sensing output signal, calculating a self-sensing difference between the self-sensing output signal and a self-sensing static parameter, and calibrating the mutual-sensing output signal according to the mutual-sensing output signal and the self-sensing difference.

Abstract: This disclosure provides a noise suppression circuit for suppressing a noise in a voltage signal. The noise suppression circuit comprises: a switch unit having a first terminal receiving the voltage signal and a second terminal; a capacitor having a first terminal connected to the first terminal of the switch unit and a second terminal grounded; and an analog front-end unit including an operational amplifier with a signal input terminal and a reference-voltage input terminal electrically connected to the second terminal of the switch unit; wherein the switch unit is controlled by a pulse signal.

Abstract: A touch detection method for a capacitive sensing device is disclosed. The capacitive sensing device is utilized for detecting capacitance variance of a panel, and a variable capacitor includes a first end electrically coupled to the panel. The touch detection method includes simultaneously providing a first clock signal to a second end of the variable capacitor and providing a second clock signal to the panel; determining a touched region of the panel according to a voltage variance of the first end of the variable capacitor; and generating an output signal utilized for indicating the touched region. Notably, the first clock signal and the second clock signal have opposite phases against each other.

Abstract: A calibration method for a capacitive sensing device is disclosed. The capacitive sensing device is capable of operating in a self-sensing mode or a mutual-sensing mode. The calibration method includes detecting a capacitance change of a panel in the self-sensing mode to generate a self-sensing output signal, detecting a capacitance change of the panel in the mutual-sensing mode to generate a mutual-sensing output signal, calculating a self-sensing difference between the self-sensing output signal and a self-sensing static parameter, and calibrating the mutual-sensing output signal according to the mutual-sensing output signal and the self-sensing difference.

Abstract: An analog-to-digital converting device includes a converting module, for sampling an analog input voltage according to a plurality of sampling signals to generate a comparing voltage and generating a comparing signal according to the comparing voltage, wherein the converting module comprises a plurality of capacitors and each of the plurality of capacitors couples between one of the plurality sampling signals and the comparing voltage; a control module, for adjusting the plurality of sampling signals according to the comparing signal, to generate a digital signal corresponding to the analog input voltage, wherein a plurality of bits of the digital signal are respectively corresponding to the capacitances of the plurality of capacitors; and a calibration module, for adjusting the capacitances of the plurality of capacitors according to the digital signal.

Abstract: An analog-to-digital converting device includes a converting module for sampling an input voltage according to a plurality of sampling signals, to generate a comparing signal; a control module, for adjusting the plurality of sampling signal according to the comparing signal, to generate a first digital signal corresponding to the input voltage and a plurality of weights; and a calibration module, for adjusting the plurality of sampling signal according to the first digital signal to make the control module generate a second digital signal and for adjusting the plurality of weights according to the first digital signal and the second digital signal; wherein the second digital signal is different from the first digital signal and is corresponding to the plurality of weights.

Abstract: An analog to digital conversion method includes: receiving an analog input signal by using a coarse analog to digital converter (ADC) and a fine ADC; generating a first digital signal by using the coarse ADC according to the analog input signal; comparing each bit of the second-most significant bit to the least significant bit of the first digital signal with the most significant bit of the first digital signal to generate a comparison result; according to the comparison result, controlling switching of a high bit capacitor array of the fine ADC to convert the analog input signal received by the fine ADC into a residual signal; generating a second digital signal according to the residual signal by sequentially switching a low bit capacitor array of the fine ADC by using the fine ADC; and combining the first digital signal and the second digital signal to generate a digital output signal.

Abstract: A successive approximation analog-to-digital converter includes: a comparator for comparing first and second comparison voltages from a conversion module and respectively identical to first and second input voltages, which are transmitted to the conversion module via a switch module in an ON state; and a control module for controlling the switch module and the conversion module and generating a digital output that corresponds to a difference between the first and second input voltages based on first and second comparison signals from the comparator and a clock signal. The switch module includes two switch units each having a series connection of first and second switches, and a third switch coupled to a common node between the first and second switches.

Abstract: A successive approximation analog-to-digital converter includes: a comparator for comparing first and second comparison voltages from a conversion module and respectively identical to first and second input voltages, which are transmitted to the conversion module via a switch module in an ON state; and a control module for controlling the switch module and the conversion module and generating a digital output that corresponds to a difference between the first and second input voltages based on first and second comparison signals from the comparator and a clock signal. The switch module includes two switch units each having a series connection of first and second switches, and a third switch coupled to a common node between the first and second switches.