Flash analog-to-digital converter with reduced number of resistors and
comparators
    1.
    发明授权
    Flash analog-to-digital converter with reduced number of resistors and comparators 失效
    具有减少数量的电阻和比较器的闪存模数转换器

    公开(公告)号:US6127959A

    公开(公告)日:2000-10-03

    申请号:US224828

    申请日:1999-01-04

    申请人: Byoung-kwon An

    发明人: Byoung-kwon An

    摘要: A flash analog-to-digital converter reduces a property mismatching problem which may occur due to process variations by reducing the number of comparators and resistors as compared to conventional converters. A half code generator receives an analog signal and outputs a one-bit middle code and a (m/2-1)-bit half thermometer code in response to a system clock signal, where m=2.sup.n and n is a positive integer. A code generator receives the middle code and the (m/2-1)-bit half thermometer code, performs a logic operation with respect to the middle code and the half thermometer code, and outputs an operation result as a (m-1)-bit full thermometer code. An encoder encodes the (m-1)-bit full thermometer code into n-bit binary data.

    摘要翻译: 与常规转换器相比,闪存模数转换器通过减少比较器和电阻器的数量来减少由于过程变化而可能发生的属性不匹配问题。 半码发生器响应于系统时钟信号接收模拟信号并输出​​一位中间码和(m / 2-1)位半温度计代码,其中m = 2n,n是正整数。 代码生成器接收中间代码和(m / 2-1)位半温度计代码,对中间代码和半温度计代码执行逻辑运算,并将运算结果输出为(m-1) 位全温度计代码。 编码器将(m-1)位全温度计代码编码为n位二进制数据。

    Digitizer controller
    2.
    发明授权
    Digitizer controller 失效
    数字化仪控制器

    公开(公告)号:US06043810A

    公开(公告)日:2000-03-28

    申请号:US981177

    申请日:1997-12-12

    CPC分类号: G06F3/045

    摘要: A digitizer controller includes a panel drive signal generator (10), a reference voltage generator (12), a first multiplexer (14) for selectively outputting either a panel drive signal or a reference voltage signal, a 4-channel driving portion (16) for generating a channel driving signal which is provided to each corner of a panel, a third multiplexer (26) for selectively outputting one of the finger touch signals and a stylus signal output from a stylus, a band pass filter, a rectifier (30) for rectifying the output of the band pass filter, a low pass filter (38) for detecting a substantial direct current component from the output of the rectifier (30), an analog-to-digital converter (44) for outputting the output of the low pass filter in synchronization with a panel driving control signal as a coordinates signal, and an interface (46). Therefore, the digitizer controller can be adopted to each of the stylus, finger touch and touch panel type digitizers, and in implementing a semiconductor integrated circuit, reliability is provided and power consumption is lowered.

    摘要翻译: PCT No.PCT / KR96 / 00089 Sec。 371日期1997年12月12日 102(e)日期1997年12月12日PCT提交1996年6月12日PCT公布。 WO96 / 42068 PCT出版物 日期:1996年12月27日数字转换器控制器包括面板驱动信号发生器(10),参考电压发生器(12),用于选择性地输出面板驱动信号或参考电压信号的第一多路复用器(14) 驱动部分(16),用于产生提供给面板的每个角的通道驱动信号;第三多路复用器(26),用于选择性地输出手指触摸信号中的一个以及从触笔输出的触笔信号,带通滤波器, 整流器(30),用于对带通滤波器的输出进行整流;低通滤波器(38),用于从整流器(30)的输出端检测实质的直流分量;模数转换器(44),用于 与面板驱动控制信号同步地输出低通滤波器的输出作为坐标信号,以及接口(46)。 因此,数字转换器控制器可以被采用于触针,手指触摸和触摸面板型数字化仪中的每一个,并且在实现半导体集成电路时,提供可靠性并降低功耗。