{"id":172,"date":"2016-08-14T00:17:04","date_gmt":"2016-08-13T15:17:04","guid":{"rendered":"http:\/\/blog.y-lab.org\/?p=172"},"modified":"2016-08-14T00:17:04","modified_gmt":"2016-08-13T15:17:04","slug":"ttl-%e3%81%a7-psg-%e9%9f%b3%e6%ba%90%e3%82%92%e4%bd%9c%e3%82%8b-%e3%81%9d%e3%81%ae%ef%bc%94","status":"publish","type":"post","link":"https:\/\/blog.y-lab.org\/?p=172","title":{"rendered":"TTL \u3067 PSG \u97f3\u6e90\u3092\u4f5c\u308b \u305d\u306e\uff14"},"content":{"rendered":"<p>\u3055\u3066\u91cd\u8981\u306a\u306e\u306f DAC \u306e\u8a2d\u8a08\u3067\u3059\u3002<\/p>\n<p>AY-3-8910 \u306f\u5404 ch \u5185\u90e8 4bit \u306e\u8868\u73fe\u3092\u6301\u3061\u307e\u3059\u304c\u3001\u305d\u306e\u51fa\u529b DAC \u306f\u5bfe\u6570\u51fa\u529b\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n<a href=\"http:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac_output.jpg\"><img loading=\"lazy\" class=\"alignnone size-medium wp-image-173\" src=\"http:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac_output-221x300.jpg\" alt=\"dac_output\" width=\"221\" height=\"300\" srcset=\"https:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac_output-221x300.jpg 221w, https:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac_output.jpg 483w\" sizes=\"(max-width: 221px) 100vw, 221px\" \/><\/a><\/p>\n<p>\u5bfe\u6570\u51fa\u529b\u3068\u3044\u3046\u3053\u3068\u306f\u3001\u30b9\u30c8\u30ec\u30fc\u30c8\u306b R-2R \u30e9\u30c0\u30fc\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002<br \/>\n\u7c21\u5358\u306b\u601d\u3044\u3064\u304f\u69cb\u6210\u306f\u4ee5\u4e0b\u306e3 \u3064\uff1a<\/p>\n<p>(1) <a href=\"https:\/\/en.wikipedia.org\/wiki\/Logarithmic_resistor_ladder\">\u5bfe\u6570\u578b DAC<\/a> \u3092\u7d44\u3080<br \/>\n(2) 74154 + \u62b5\u6297 16 \u500b<br \/>\n(3) \u30c7\u30a3\u30b8\u30bf\u30eb\u3067 linear-log \u5909\u63db\u3092\u3057\u305f\u5f8c\u30d0\u30a4\u30ca\u30ea DAC<\/p>\n<p>\u72ec\u7acb 3ch \u5206\u306e DAC \u3092\u7d44\u307e\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u305f\u3081\u3001\u4eca\u56de\u306f\u4e00\u756a\u69cb\u6210\u90e8\u54c1\u306e\u5c11\u306a\u3044 (1) \u306e\u69cb\u6210\u3067\u8a2d\u8a08\u3057\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001(1) \u306f\u300cTTL\u3067\u4f5c\u308b&#8230;\u300d\u3068\u9298\u6253\u3063\u3066\u304a\u304d\u306a\u304c\u3089 CMOS IC \u3092\u4f7f\u3046\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u3001TTL \u7e1b\u308a\u304c\u91cd\u8981\u306a\u3089 (2) \u3092\u63a1\u7528\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u30aa\u30ea\u30b8\u30ca\u30eb\u306e IC \u306f MOS \u306b\u3088\u308a\u307e\u3059\u304c\u30fb\u30fb\u30fb\u3002<\/p>\n<p><a href=\"http:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac.png\"><img loading=\"lazy\" class=\"alignnone  wp-image-174\" src=\"http:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac-300x78.png\" alt=\"dac\" width=\"381\" height=\"99\" srcset=\"https:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac-300x78.png 300w, https:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac-768x199.png 768w, https:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac-1024x266.png 1024w, https:\/\/blog.y-lab.org\/wp-content\/uploads\/2016\/08\/dac.png 1313w\" sizes=\"(max-width: 381px) 100vw, 381px\" \/><\/a><\/p>\n<p>\u8a2d\u8a08\u3057\u305f DAC \u306e\u56de\u8def\u56f3\u3092\u793a\u3057\u307e\u3059\u3002CMOS \u306e\u30a2\u30ca\u30ed\u30b0\u30b9\u30a4\u30c3\u30c1 4053B \u306f\u90fd\u5408\u826f\u304f 3 \u56de\u8def\u5165\u308a\u306a\u306e\u3067\u30013ch \u306e 4 bit DAC \u304c \u308f\u305a\u304b 4 \u500b\u306e IC \u3067\u69cb\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5bfe\u6570\u306e\u5e95\u306b\u3064\u3044\u3066\u306f\u3001\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306e\u56f3\u8868\u304b\u3089 LSB \u304c -3dB (sqrt(1\/2) \u500d) \u306b\u306a\u308b\u3088\u3046\u306b\u56de\u8def\u5b9a\u6570\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5b9a\u6570\u304c\u59a5\u5f53\u304b\u3069\u3046\u304b\u306f\u308f\u304b\u308a\u307e\u305b\u3093\u3002\u51fa\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f 47k \u3068\u306a\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u624b\u6301\u3061\u306e\u62b5\u6297\u5024\u306b\u3088\u3063\u3066\u5b9a\u6570\u3092\u9069\u5f53\u306b\u8a2d\u5b9a\u3057\u305f\u7d50\u679c\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3055\u3066\u91cd\u8981\u306a\u306e\u306f DAC \u306e\u8a2d\u8a08\u3067\u3059\u3002 AY-3-8910 \u306f\u5404 ch \u5185\u90e8 4bit \u306e\u8868\u73fe\u3092\u6301\u3061\u307e\u3059\u304c\u3001\u305d\u306e\u51fa\u529b DAC \u306f\u5bfe\u6570\u51fa\u529b\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002 \u5bfe\u6570\u51fa\u529b\u3068\u3044\u3046\u3053\u3068\u306f\u3001\u30b9\u30c8\u30ec\u30fc\u30c8\u306b R-2R \u30e9\u30c0\u30fc\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002  [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8,5],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/posts\/172"}],"collection":[{"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=172"}],"version-history":[{"count":1,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/posts\/172\/revisions"}],"predecessor-version":[{"id":175,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/posts\/172\/revisions\/175"}],"wp:attachment":[{"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}