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2012年6月28日

多一点余量，少一点尴尬（转）

摘要： 设计余量，一点不让人陌生。如果没有记错，特权同学还在搞军工那会，对于电路的设计余量常常要求达到50%。对于大多数设计应用来说，这样的余量标准近乎浪费。在这个资源匮乏的节约型社会，也对工程师们提出新的思考，到底要不要余量？多少才算合适？ 曾经有一段时间，觉得一个好的设计，是能够把电路板的面积、其上所有的元器件、甚至芯片的每一项功能都用到极致。也许，这样的设计可以达到成本最小化，是BOSS最希望看到的... 阅读全文

posted @ 2012-06-28 09:08 believe 阅读(421) 评论(0) 推荐(0) 编辑

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/* * Name: SyntaxHighlighter.brushes.Verilog * Author: Yuphone Chang * Email: yuphone@qq.com/ * Create Date: 5.18, 2010 */ SyntaxHighlighter.brushes.Verilog = function() { var datatypes = 'reg integar unsigned ' + 'wire tri wand triand tri0 tri1 supply0 supply1 trireg ' + 'parameter specparam defparam event '; var primitives = 'and nand or nor xor xnor ' + 'buf not ' + 'bufif0 bufif1 notif0 notif1 ' 'pullup pulldown ' + 'pmos rpmos nmos rnmos '; var keywords = 'module endmodule ' + 'input output inout ' + 'begin end ' + 'assign deassign always initial genvar ' + 'forever repeat disable wait ' + 'function endfunction' + 'task ' + 'endtask ' + 'generate endgenerate ' + 'specify endspecify ' + 'posedge negedge ' + 'if else for while ' + 'case casex casez endcase default ' + 'include timescale ' + 'ifdef endif ' + 'celldefine endcelldefine ' + 'attribute ' 'fork join '; var functions = 'display displayb displayo displayh ' + 'write writeb writeo writeh ' + 'strobe strobeb strobeh strobeo ' + 'monitor monitorb monitoro monitorh ' + 'fopen fclose ' + 'readmemb readmemh ' + 'finish stop ' + 'time stime realtime timeformat ' + 'printtimescale ' + 'setup hold setuphold skew recovery period width '; this.regexList = [ // one line comments { regex: SyntaxHighlighter.regexLib.singleLineCComments,css: 'comments' }, // multiline comments { regex: SyntaxHighlighter.regexLib.multiLineCComments, css: 'comments' }, // double quoted strings { regex: SyntaxHighlighter.regexLib.doubleQuotedString, css: 'string' }, // single quoted strings { regex: SyntaxHighlighter.regexLib.singleQuotedString, css: 'string' }, // constants { regex: new RegExp("[0-9]+['][bBoOdDhHeEfFtT][0-9a-fA-FzZxX_]+", 'g'), css: 'constants' }, // datatypes { regex: new RegExp(this.getKeywords(datatypes), 'gm'), css: 'color1 bold' }, // primitives { regex: new RegExp(this.getKeywords(primitives), 'gm'), css: 'color2 bold' }, // keywords { regex: new RegExp(this.getKeywords(keywords), 'gm'), css: 'keyword bold' }, // functions { regex: new RegExp(this.getKeywords(functions), 'gm'), css: 'functions bold' } ]; }; SyntaxHighlighter.brushes.Verilog.prototype = new SyntaxHighlighter.Highlighter(); SyntaxHighlighter.brushes.Verilog.aliases = ['verilog', 'v'];