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<table cellpadding="3" cellspacing="0" width="100%" class="forumline"> <thead> <caption><table border="0" cellspacing="0" cellpadding="0" width="100%" class="forumheader"> <tr> <td align="left" valign="bottom" width="25"><img src="http://picsrv.fora.pl/AcidTechTiger/images/hdr_left.gif" width="25" height="27" alt="" /></td> <td align="center" class="forumheader-mid">Topic review</td> <td align="right" valign="bottom" width="25"><img src="http://picsrv.fora.pl/AcidTechTiger/images/hdr_right.gif" width="25" height="27" alt="" /></td> </tr></table></caption> </thead> <tbody> <tr> <th class="thCornerL" width="22%" height="26">Author</th> <th class="thCornerR">Message</th> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>lompiacv</b></span></td> <td class="row1" height="28" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="http://picsrv.fora.pl/AcidTechTiger/images/post_old.gif" width="12" height="9" alt="Post" title="Post" border="0" /><span class="postdetails">Posted: Mon 3:31, 13 Dec 2010<span class="gen"> </span> Post subject: tory burch shoes Seven sections of code-BCD, decim</span></td> </tr> <tr> <td colspan="2"><hr /></td> </tr> <tr> <td colspan="2"><span class="postbody">Seven sections of code-BCD, decimal code conversion device for <br /> <br /> <br />Coding in Table 3. Table 2 The combination of the ten representatives of ten a6gg + fe hex encoded binary digital 0l10601111F100l022001133100194010155010046011l770000O8000l19 Table 3, the representative of the transformed ten ten abgg + hex code hex digital 01l0601O0081O0lO22001133100l9401Ol5501OO46011177000008000119 changed the code table based decoding circuit 3 , this lists the truth table shown in Table 4, the logical expressions to facilitate the writing of the eight input variables Ⅱ, bg, g +, by the letters, B, C, D, said decoder output variables will be used D3 , D2, D】, Do salt Banana 2! said. Logical expression truth table can be written according to their method is the longitudinal direction of each output logical variable which is a horizontal line where the input variables represented by a logistic, and then all of these items as \The output variable is the logical expression, such as (1), (2), (3), (4). D0 = ABCD + ABCD + A reads CD + ABCD + ABCD (1) D】 = hundred c + A A-BCD + hundred + a ABCD (2) D, = 4 Li D + Li D + Li + ABCD (3) D3 = ABCD + ABCD (4) then the logic variable Do, D1,<a href="http://www.toryburchsaler.net" target="_blank">tory burch shoes</a>, D2, D3 expression draw Karnaugh map shown in Figure 3, respectively, who figure to play \charts to equation (1), (2), (3), (4) simplified to Do = AD + ABCD (5) D】 = dcD + ABC + ABCD (6) D, = + ABCD + A-A B-CD (7) D3 = Renaissance (<img src="http://picsrv.fora.pl/images/smiles/icon_cool.gif" alt="Cool" border="0" /> This equation (5) ~ (<img src="http://picsrv.fora.pl/images/smiles/icon_cool.gif" alt="Cool" border="0" /> is the input logic variables A, B, C, D and output logic variable D], D2, Dl, D0 of the most simple logic equation, according to their design components used in the decoding circuit at least,<a href="http://www.stivaliuggboots.com" target="_blank">ugg stivali</a>, the logic circuit shown in Figure 4. - ● - ● A ∞ CD ∞ CD01 √ 3 √ 2B5-, / 7 √ 6 is Lu 12I31514A turtle i91110 () Dn Karnaugh map - \ CDCDCDCD ∞ A0I3-J'2, / 4 √ 57w \) D. Karnaugh map cbcDcbCD0l324, |, i'612l3l5I4d89JI110 ∞ cntb ∞ 0./1I3A at 576 days 13l514 mouth 89lll0 Figure 3 Figure 4 Second, the seven sections of code - + binary code principle and circuit implementation will be seven if necessary section of code into decimal code, can be seen from Table 3, the encoding is already operator sets the order of BCD code just a different rule, the seven-segment code conversion of a decimal code only store 1 and 2 using the circuit re-use existing BCD code - decimal decoder, such as the CD4028 and so on can easily accomplish this task, but this time in 4028 need to use the input and output pins to re-define, as shown in Table 5 8 Table 4 and the truth table input and output ports C, J hexadecimal system on behalf of the ten dbgg + coding, J], J2, J1, J0 binary digital 0l1060000010008000ll0010200l0200ll300l13】 00l9010040l01501015010040ll060ll170lll700000100080001110O19 Table 5 input output pins 10l1312I1131421516749l5 Haraguchi C, Jy0Y No.】 Y2Y4yY7y8 on behalf of the most pan to low and one high 0l23456789 bit of its weight,<a href="http://www.stivaliuggboots.com" target="_blank">ugg prezzo</a>, JC mouth Italy ygY9y2Y6Y5ynrYLY most sense given the new meaning of the low bit of a high-8923650714 1 III Conclusion seven segment code or BCD code into decimal code has been plagued a difficulty in its application. This method has successfully solved this problem, the practical effects of good, so it has practical value. Although this is a 7107A / D converter were discussed,<a href="http://www.stivaliuggboots.com" target="_blank">ugg italia</a>, but 7106 produced a class of seven-segment code, etc. The A / D converter is also applicable. References i] Han Qigang, some Huimin use EPROM linearization temperature display device electronics technology. I990 (1) 2J Han Qigang a programmable automatic digital temperature pressed optimal solution Instrument,<a href="http://www.stivaliuggboots.com" target="_blank">ugg milano</a>, 1991) (10) metering technology 2001No8 <br /> <br />相关的主题文章： <br /> <br /> <br /> <a href="http://douglhurli5.forumup.be/viewtopic.php?p=19557&mforum=douglhurli5#19557" target="_blank">ugg italia Digital high resistance meter circuit d</a> <br /> <br /> <a href="http://www.ibeidou.net/home/space.php?uid=34569&do=blog&id=215279" target="_blank">ugg boots günstig Thermal desorption GC with the</a> <br /> <br /> <a href="http://home.dnkb.com.cn/space.php?uid=72145&do=blog&id=110276" target="_blank">ugg milano Throttling device to expand the scope o</a></span></td> </tr> </table></td> </tr> <tr> <td colspan="2" class="spaceRow"><img src="http://picsrv.fora.pl/AcidTechTiger/images/spacer.gif" alt="" width="1" height="1" /></td> </tr> </tbody> </table>
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