Abstract:
본 발명에서 제안하고 있는 이득 증폭기를 이용한 액추에이터의 피드백 제어 시스템 및 방법에 따르면, 피드백 제어 시스템에서 기존에 사용되고 있는 아날로그 컨트롤러 블록을 제거하고, 이득 증폭기로 게이트 드라이브를 구현하여 동일한 효과를 얻음으로써, 구성을 간단히 하고, 구동이 용이하며, 제작 단가를 절감할 수 있다. 또한, 또한, 본 발명에 따르면, Close Loop에서 컨트롤러 부분을 제거하여 회로의 안정성 문제를 해결할 수 있고, 액추에이터 드라이버를 구성하고 있는 H-Bride의 PMOS 및 NMOS의 온오프 레벨을 이용하여 간단하게 액추에이터의 구동을 제어할 수 있으며, PWM 신호를 사용하지 않으므로 PWM에 의하여 만들어지는 노이즈 문제도 해결할 수 있다.
Abstract:
PURPOSE: A feedback control system of an actuator using a gain amplifier and a controlling method thereof are provided to simplify a configuration by removing an analog controller block. CONSTITUTION: A first gain amplifier amplifies a target signal and a feedback signal. A second gain amplifier amplifies the amplified signal again. A driver time generator(300) controls the first gain amplifier and the second gain amplifier. An actuator driver(400) includes an actuator. A feedback generator(500) generates a feedback signal. [Reference numerals] (100) First gain amplifier; (200) Second gain amplifier; (300) Driver time generator; (400) Actuator driver; (410) Actuator; (500) Feedback generator
Abstract:
PURPOSE: A touch screen panel is provided to increase capacitance sensitivity and linearity by forming an electrode pattern in a windmill-type. CONSTITUTION: A first layer includes a first conductive line. A second layer is separated from the first layer and includes a second conductive line. The first and second conductive lines include pattern cells(130) having a windmill-type on the first and second layers. Pattern cells are formed on the first and second layers.
Abstract:
PURPOSE: An analog to digital conversion system and a method for reducing noise in a touch sensor by integrating an analog signal are provided to measure time reaching a reference value by integrating a sample and a held signal. CONSTITUTION: A CDS(Correlated Double Sampling) circuit(110) extracts a signal factor generated by deducting a premeasured reference value from an analog wave signal received from an input terminal connected to a touch panel(200). A sampling circuit(120) changes an analog signal factor inputted from the CDS circuit into a signal of a step waveform. An integrator(130) integrates the signal of the step waveform for a predetermined time period. An output circuit(140) outputs a binary code according to sensing time by comparing a preset first reference value with an integrated value. The output circuit reduces noise from a touch sensor by integrating the analog signal.