{"id":907,"date":"2013-05-19T14:18:13","date_gmt":"2013-05-19T19:18:13","guid":{"rendered":"http:\/\/pugix.com\/synth\/?p=907"},"modified":"2020-02-16T15:32:58","modified_gmt":"2020-02-16T20:32:58","slug":"two-of-twelve-sample-and-holds","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/two-of-twelve-sample-and-holds\/","title":{"rendered":"Two of twelve sample and holds"},"content":{"rendered":"<p>Here is a <a title=\"CGSSSG\" href=\"http:\/\/www.cgs.synth.net\/modules\/cgsssg_ssg.html\" target=\"_blank\" rel=\"noopener noreferrer\">CGS SSG<\/a> board, assembled as a dual S&amp;H with a one-shot circuit.\u00a0 It&#8217;s the first of six identical boards for use in the <a title=\"Quantasise Project\" href=\"http:\/\/pugix.com\/synth\/quantasise-project\/\">Quantasise<\/a>.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2013\/05\/ssg-dual-sh.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"908\" data-permalink=\"https:\/\/pugix.com\/synth\/two-of-twelve-sample-and-holds\/ssg-dual-sh\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2013\/05\/ssg-dual-sh.jpg?fit=1000%2C382&amp;ssl=1\" data-orig-size=\"1000,382\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"ssg-dual-sh\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2013\/05\/ssg-dual-sh.jpg?fit=1000%2C382&amp;ssl=1\" class=\"aligncenter size-medium wp-image-908\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2013\/05\/ssg-dual-sh.jpg?resize=500%2C191&#038;ssl=1\" alt=\"ssg-dual-sh\" width=\"500\" height=\"191\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2013\/05\/ssg-dual-sh.jpg?resize=500%2C191&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2013\/05\/ssg-dual-sh.jpg?w=1000&amp;ssl=1 1000w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>The SSG (Smooth &amp; Stepped Generator) has two virtually identical sections that can each function as a VC slew, VCO, or Sample &amp; Hold.\u00a0 The S&amp;H function is implemented by negatively pulsing the Hold input.\u00a0 A pulse releases the hold for a moment, allowing the output to slew towards the input and then hold again.\u00a0 The minimum acquisition time obtainable with the selected capacitor is about 0.28 milliseconds, relatively long for a S&amp;H, but it works just fine for my purpose.\u00a0 No external rate pot is needed, because the trimmer is capable of setting the rate for the shortest acquisition time.\u00a0 I selected a 47 nf polypropylene capacitor for the integrator.\u00a0 This\u00a0 capacitor is Mouser part number 505-MKP20.047\/100\/5 (WIMA MKP2D024701C00JSSD).<\/p>\n<p>In addition to the two S&amp;H circuits, each SSG includes two one-shot negative pulse generators.\u00a0 The one that produces a pulse on both positive and negative phases of the cycle is used to drive two S&amp;H circuits, as shown in the Quantisise block diagram.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here is a CGS SSG board, assembled as a dual S&amp;H with a one-shot circuit.\u00a0 It&#8217;s the first of six identical boards for use in the Quantasise. The SSG (Smooth &#8230; <a class=\"styledbutton\" href=\"https:\/\/pugix.com\/synth\/two-of-twelve-sample-and-holds\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":908,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[14],"tags":[131,71,138,16],"class_list":["post-907","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","tag-cgs-2","tag-diy","tag-quantisise","tag-sample-and-hold"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Two of twelve sample and holds - Richard Brewster&#039;s Electronic Sounds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pugix.com\/synth\/two-of-twelve-sample-and-holds\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Two of twelve sample and holds - Richard Brewster&#039;s Electronic Sounds\" \/>\n<meta property=\"og:description\" content=\"Here is a CGS SSG board, assembled as a dual S&amp;H with a one-shot circuit.\u00a0 It&#8217;s the first of six identical boards for use in the Quantasise. 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