外文翻译---基于eda技术的hdb3编码器的设计与实现(编辑修改稿)

外文翻译---基于eda技术的hdb3编码器的设计与实现(编辑修改稿)内容摘要：

unit V Gen ,B yard produced the unit B Gen ,A pair of polar conversion units single2double of single polarity ,Their structure charts. 2. 1 V yard produced the unit V_Gen V one yard of functions of producing the unit is to connect four in the news code with 0 bunches of detection in fact, namely when connecting with 0 bunches four, vary, succeed V yard fourth 0, but otherwise, keep the former state of the news code exporting. For offer the convenience to encoding the course, transmit yard, say with 2 binary scale one the intersection of code and yuan in the original signal, while going on with V yard, use„11‟ in unison Annotate it, original l yard uses „01‟ Annotate, 0 yards use „00‟Annotate. Fig. 2 shows for V one yard of job flow diagrams which produces the unit. The original signal NRZ_in produced the unit V_Gen through V yard And then signal V_Gen_out wave form: 2. 2 B yard produced the unit B_Gen B one yard of functions of producing the unit is to guarantee the additional V array after yard is not destroyed „Polarity overturns alternatively‟ Directflow characteristic does not formed, namely when there are a piece of not 0 yards of even number between adjacent V yard, after one is small for that section if you can‟t vary as, destroy by symbol a B of yards 4 each to the first times 0. So, while judging whether some one 0 should be turned into B, should guarantee at first thereafter code yuan of third are one yard of yuan of V, so must until each go on, store temporarily at present, it waits for to be thereafter third the intersection o f code and arrival of yuan. For realize purpose this, at first each insert V punish Put into the displacement register of 3 for one, under the function of the synchronous clock, whether add the judgment of B yard at the same time, when yard of yuan are from shifting to e out in the register, can determine to vary into B yard, shine the original yard of outputs. Fig. 4 shows for B one yard of job flow diagrams which produces the unit. The signal V_Gen_out produced the unit B_Gen through B yard after adding V And then signal B_Gen_out wave form. 2. 3 form polarity – one pair of polar conversion units single 2 double According to the code rule of HDB3, we can know, the polarity of V yard is positive defeated by the alternative one, remaining 1 and the intersection of B and yard regard as until an organic whole and positive to shoulder not alternative, meet the intersection of V and polarity with the intersection of zero and identical polarity of in the front of yard at the same time. Therefore we can carry on separately polar variety of it to realize. Know from the procedure of the front, „V‟, „B‟, „1‟ Have already used one pair of phases yard separately „11‟, „10‟, „01‟ Annotate it, „0‟ Use „00‟ Annotate, so we can realize very easily through the following procedures. Fig. 5 shows for the job flow diagrams of a pair of polar conversion units of single polarity. Through a pair of polar transformation units of single polarity, 1 including „1‟, „V‟, „B‟ Use 2 binary scale yard „01‟ Show – 1 „the 1‟ „the V‟ „the B‟ Use 2 binary scale yard „11‟ Show, 0 use 2 the intersection of binary scale and yards of „the 00‟ S。