{"id":9955,"date":"2014-11-12T09:59:00","date_gmt":"2014-11-11T22:59:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2014\/11\/12\/dds-amplifier\/"},"modified":"2025-07-22T03:36:46","modified_gmt":"2025-07-21T17:36:46","slug":"dds-amplifier","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2014\/11\/12\/dds-amplifier\/","title":{"rendered":"DDS amplifier"},"content":{"rendered":"<div class=\"separator\" style=\"clear: both; text-align: center;\"> <a href=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2014\/11\/Boosteramp.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" height=\"225\" src=\"https:\/\/www.homebrewradio.us\/blog\/wp-content\/uploads\/2014\/11\/Boosteramp.jpg\" width=\"400\" \/><\/a><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"> <b>Tony, G4WIF, asked about an amplifier to boost the output of the AD9850 chip. Here is Dr. Juliano&#8217;s prescription: <\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"> <b><br \/><\/b><\/div>\n<div> <b>You might find that once you plug that <span class=\"il\">DDS<\/span> into a circuit you may not quite get 1 V pk to pk and in fact after about 10 MHz it really starts to sag. See the attached drawing as you can put this \u201cafterburner\u2019 on the output of the <span class=\"il\">DDS<\/span>. The isolated output is good if you are interfacing with \u201ctoob\u201d type equipment \u2013it can be left off if you are doing SS or just left in place. This is the output from the amp and as you can see fairly clean.<\/b><\/div>\n<div> <b> <\/b><\/div>\n<div> <b>73\u2019s<\/b><\/div>\n<div> <b>Pete N6QW<\/b><\/div>\n<div> <\/div>\n<div> <img loading=\"lazy\" decoding=\"async\" alt=\"IMG_0266\" border=\"0\" class=\"CToWUd a6T\" height=\"484\" src=\"https:\/\/mail.google.com\/mail\/u\/0\/?ui=2&#038;ik=baa1e2b8a3&#038;view=fimg&#038;th=1493a2fb1234087b&#038;attid=0.0.1&#038;disp=emb&#038;attbid=ANGjdJ-NJUoNpjtDBjBPSbSgdPHcSxLen1jrEE7Xjl8LmZRCnZKTU_RnH2pRj-i2IEUWSrueJj_FGbHOuwWzyhnxMynfsiA9kq_RrubEDP3vegK7OpednO5HVN0Sx9c&#038;sz=w1600-h1000&#038;ats=1415785785922&#038;rm=1493a2fb1234087b&#038;zw&#038;atsh=1\" style=\"background-image: none; border: 0px currentColor; display: inline; padding-left: 0px; padding-right: 0px; padding-top: 0px;\" tabindex=\"0\" title=\"IMG_0266\" width=\"644\" \/><\/p>\n<div class=\"a6S\" dir=\"ltr\" style=\"left: 556px; opacity: 1; top: 1002.25px;\">\n<div aria-label=\"Download attachment IMG_0266[2].jpg\" class=\"T-I J-J5-Ji aQv T-I-ax7 L3 a5q\" data-tooltip-class=\"a1V\" data-tooltip=\"Download\" id=\":1dw\" role=\"button\" tabindex=\"0\">\n<div class=\"aSK J-J5-Ji aYr\"> <\/div>\n<\/p><\/div>\n<div aria-label=\"Save attachment to Drive IMG_0266[2].jpg\" class=\"T-I J-J5-Ji aQv T-I-ax7 L3 a5q\" data-tooltip-class=\"a1V\" data-tooltip=\"Save to Drive\" id=\":1dx\" role=\"button\" tabindex=\"0\">\n<div class=\"wtScjd J-J5-Ji aYr aQu\">\n<div class=\"T-aT4\" style=\"display: none;\">\n<div> <\/div>\n<div class=\"T-aT4-JX\"> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div> <\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"> Our book: &#8220;SolderSmoke &#8212; Global Adventures in Wireless Electronics&#8221; <a href=\"http:\/\/soldersmoke.com\/book.htm\">http:\/\/soldersmoke.com\/book.htm<\/a> Our coffee mugs, T-Shirts, bumper stickers: <a href=\"http:\/\/www.cafepress.com\/SolderSmoke\">http:\/\/www.cafepress.com\/SolderSmoke<\/a> Our Book Store: <a href=\"http:\/\/astore.amazon.com\/contracross-20\">http:\/\/astore.amazon.com\/contracross-20<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Tony, G4WIF, asked about an amplifier to boost the output of the AD9850 chip. Here is Dr. Juliano&#8217;s prescription: You might find that once you plug that DDS into a circuit you may not quite get 1 V pk to pk and in fact after about 10 MHz it really starts to sag. See the &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2014\/11\/12\/dds-amplifier\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;DDS amplifier&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":9956,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[67,41],"tags":[],"class_list":["post-9955","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arduino","category-juliano-pete"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=9955"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9955\/revisions"}],"predecessor-version":[{"id":9957,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9955\/revisions\/9957"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/9956"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=9955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=9955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=9955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}