公开(公告)号：US06891445B2

公开(公告)日：2005-05-10

申请号：US10458279

申请日：2003-06-11

Applicant: Noboru Kusama ,  Katsuya Kitada ,  Masahiro Akiyama ,  Takashi Nakagawa ,  Noriko Sato

Inventor： Noboru Kusama ,  Katsuya Kitada ,  Masahiro Akiyama ,  Takashi Nakagawa ,  Noriko Sato

IPC: H04L27/20 ,  H03C3/00

CPC classification number: H04L27/2071

Abstract: In response to changes in an input binary digital signal, a 3rd order cosine pulse waveform, which, when it is changed in the increasing direction, has “0” level in a first period of T/12 (T corresponding to one-half cycle of the binary digital signal), is changed as a waveform of (h/2)(1+cos(3πt/T)+π/4) in the next period of 4T/12 (−5T/12≦t≦−T/12) and has an h (constant) level in the remaining period of T/12, and when it is changed in the reducing direction, has the h level in the first period of T/12, is changed as a waveform of (h/2)(1+cos(3πt/T)−π/4) in the next period of 4T/12 (T/12≦t≦5T/12) and also has “0” level in the remaining period of T/12. By using this pulse wave, a flat part is generated in a time width of T/12 with respect to a judgment point. It is thus possible to improve the immunity to the effects of digital signal jitter, obtain change judgment with a sole single pulse and reduce the circuit scale and the power consumption.

Abstract translation: 响应于输入二进制数字信号的变化，三阶余弦脉冲波形当其在增加方向上改变时在T / 12的第一周期（对应于半周期的T）中具有“0”电平 在二进制数字信号的下一个周期中，作为（h / 2）（1 + cos（3pit / T）+ pi / 4）的波形而变化（-5T / 12 <= t < -T / 12），并且在T / 12的剩余时间段中具有h（常数）电平，并且当在减小方向上改变时，在T / 12的第一周期中具有h电平作为波形 在4T / 12的下一个周期（T / 12 <= t <= 5T / 12）中的（h / 2）（1 + cos（3pit / T）-pi / 4） 剩余时间T / 12。 通过使用该脉波，相对于判断点，以T / 12的时间宽度产生平坦部。 因此，可以提高对数字信号抖动的影响的抗扰性，用唯一的单脉冲获得变化判断，并减小电路规模和功耗。