公开(公告)号：KR101150542B1

公开(公告)日：2012-06-12

申请号：KR1020110103328

申请日：2011-10-10

Applicant: (주)이미지스테크놀로지

Inventor： 강경용 ,  사두환 ,  명준형 ,  이진국

IPC: H03M1/12

CPC classification number: H03M1/50 ,  H03M1/0621 ,  H03M1/1245 ,  H03M2201/322 ,  H03M2201/6107

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.

Abstract translation: 目的：提供模数转换系统和通过对模拟信号进行积分来降低触摸传感器噪声的方法，以通过对样本和保持信号进行积分来测量达到参考值的时间。 构成：CDS（相关双采样）电路（110）通过从连接到触摸面板（200）的输入端子接收的模拟波信号中减去预测的参考值来提取生成的信号因子。 采样电路（120）将从CDS电路输入的模拟信号因子改变为阶跃波形的信号。 积分器（130）将步进波形的信号在预定时间段内积分。 输出电路（140）通过将预设的第一参考值与积分值进行比较来输出根据感测时间的二进制码。 输出电路通过集成模拟信号来减少触摸传感器的噪音。

公开(公告)号：KR1020090061507A

公开(公告)日：2009-06-16

申请号：KR1020070128534

申请日：2007-12-11

Applicant: 한양대학교 산학협력단

Inventor： 유창식 ,  조준기 ,  박재우 ,  신성철

IPC: H03M1/12

CPC classification number: H03M1/502 ,  H03M1/002 ,  H03M1/1205 ,  H03M1/362 ,  H03M2201/1172 ,  H03M2201/2216 ,  H03M2201/2372 ,  H03M2201/322 ,  H03M2201/61

Abstract: An analog to digital converter and an analog to digital converting method are provided to reduce power consumption and a chip size in comparison with the analog to digital converter comprised of a plurality of comparators comprised of pre-amplifiers. A reference voltage generator(10) generates a plurality of different reference voltages. A delay unit(20) changes a size of an analog input signal and the size and difference of a plurality of reference voltages into the delay time difference of an inputted clock. A phase detector(30) detects the delay time difference of the clock and generates the detection signal. A code generator(100) receives the detection signal and converts the detection signal into an N bit digital signal which increases as the analog input signal increases. The delay unit includes a first delay cell and a second delay cell. The first delay cell receives the clock and delays the clock as much as the first delay time according to the analog input signal. The second delay cell receives the clock and delays the clock as much as the second delay time according to the one reference voltage among the plurality of reference voltages.

Abstract translation: 与由前置放大器组成的多个比较器组成的模数转换器相比，提供了模数转换器和模数转换方法来降低功耗和芯片尺寸。 参考电压发生器（10）产生多个不同的参考电压。 延迟单元（20）将模拟输入信号的大小和多个参考电压的大小和差异改变为输入时钟的延迟时间差。 相位检测器（30）检测时钟的延迟时间差并产生检测信号。 代码生成器（100）接收检测信号，并将检测信号转换成随着模拟输入信号增加而增加的N位数字信号。 延迟单元包括第一延迟单元和第二延迟单元。 第一延迟单元接收时钟，并根据模拟输入信号将时钟延迟到第一延迟时间。 第二延迟单元接收时钟，并根据多个参考电压中的一个参考电压将时钟延迟多达第二延迟时间。