Abstract:
본 발명에 따른 터치스크린 감지 장치(100)는, 정전 용량 방식의 터치스크린 패널(20)에 대한 터치 입력의 감지를 위한 것으로서, 상기 터치스크린 패널(20)의 드라이빙 라인에 가해지는 구동 신호를 생성하는 구동 신호 생성부(300); 및 상기 터치스크린 패널(20)의 센싱 라인으로부터 출력되는 전하 신호를 전압 신호로 변환하는 전하 신호 변환부(200);를 적어도 포함하는 터치스크린 감지 장치에 있어서, 상기 전하 신호 변환부(200)의 비반전 입력단에 인가되는 참조 신호를 생성하되, 상기 참조 신호는 상기 구동 신호의 주파수와 동일한 주파수의 주기 신호로서 상기 구동 신호 또는 외부 신호를 이용하여 생성하는 참조 신호 생성부(100);를 더 포함하는 것을 특징으로 하는 한다. 본 발명에 따르면, 전하 신호의 오프셋 값을 최소화 또는 제거할 수 있으며, 피드백 캐패시터의 크기를 최소화할 수 있으며, 효율적인 ADC의 입력 다이나믹 레인지 사용이 가능함과 동시에 정밀한 터치 감지를 용이하게 하는 효과가 있다.
Abstract:
According to the present invention, a touchscreen sensing device (10) is provided to detect an input of a touch on a capacitive touchscreen panel (20). The touchscreen sensing device at least includes a drive signal generating unit (300) which generates a drive signal applied to a driving line of the touchscreen panel (20); and a charge signal converting unit (200) which converts a charge signal outputted from a sensing line of the touchscreen panel (20) into a voltage signal. The touchscreen sensing device further includes a reference signal generating unit (100) which generates a reference signal applied to a non-inverting input end of the charge signal converting unit (200), wherein the reference signal is generated as a cycle signal of the same frequency as the frequency of the drive signal by using the drive signal or an external signal. According to the present invention, an offset value of a charge signal can be minimized or eliminated, the size of a feedback capacitor can be minimized, and accurate touch sensing can be facilitated while enabling an efficient use of an input dynamic range of an ADC.
Abstract:
The present invention provides an equalizer capable of removing the influence of a post cursor and reducing phasing time while reducing the size of hardware and an operation method for the same. The equalizer includes a sampler sampling enhanced data rates for global evolution and data in an input signal or a guide signal guided from the input signal; a clock generation unit determining sampling timing of the data or sampling timing of the enhanced data rates for global evolution from the enhanced data rates for global evolution and the data; and a control unit controlling the sampling timing of the data and the sampling timing of the enhanced data rates for global evolution according to the data and the enhanced data rates for global evolution.
Abstract:
PURPOSE: A dynamic bias current famine type inverter and a low power delta-sigma modulator using the same are provided to minimize an output error by offering high gain while minimizing power consumption. CONSTITUTION: A dynamic bias current famine type inverter cascade-interlinks first PMOS(P-channel Metal Oxide Semiconductor) transistors(300,330) and second PMOS transistors(310,320). The dynamic bias current famine type inverter cascade-interlinks first NMOS(N-channel Metal Oxide Semiconductor) transistors(210,230) and second NMOS transistors(200,220). First bootstrap capacitors(100,120) are installed between a gate of the first PMOS transistor and a gate of the second PMOS transistor. Second bootstrap capacitors(110,130) are installed between the gate of the second NMOS transistor and the first NMOS transistor.
Abstract:
PURPOSE: A trans-impedance amplifying circuit is provided to improve the integrity of the trans-impedance amplifying circuit by reducing the size of electrostatic capacity. CONSTITUTION: A photo diode(310) converts an optical signal into an electric signal. A cascode type input terminal(320) is in connection with the photo diode. A first transistor(M1) forms a current path between the amplifying terminal and the output terminal of the photo diode according to the voltage level of a first node. A second transistor(M2) forms a current path between a second node and the ground according to the output voltage level of the photo diode. An amplifying terminal(330) amplifies the output of the input terminal.