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</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>Hi,<o:p></o:p></p><p class=MsoPlainText><span style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>For those of you who'd be interested about the inner workings of the Moog 960 sequencer<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>I've done a complete LTSPICE simulation of all the original RTL logic IC's used in it.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Yes original RTL logic simulation !<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Fortunately I found the RTL IC's descriptions (inside resistors & transistors connections)<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>And did a 'discrete' complete equivalent of all RTL IC's.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>I also simulate the change of any SKIP/NORMAL/STOP rotary switches (one at the time)<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>While the sequence is running !<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>A specific circuit switch a register in real time to one of the 3 possible position<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>by placing a 0 or 1 to the 2 control input named CTL1 & CTL2.<o:p></o:p></span></p><p class=MsoPlainText><span style='color:black;mso-fareast-language:FR-CA'><img width=741 height=466 id="Image_x0020_1" src="cid:image001.jpg@01D6971A.557B82F0" alt="Description : LTSPICE timings 20 - SKIP-NORMAL-STOP test circuit"></span><span lang=EN-CA style='color:black'><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:black'>Example:</span><b><span lang=EN-CA style='font-size:18.0pt;color:#002060'> </span></b><b><span lang=EN-US style='color:#002060'>LTSPICE timings 13 - normal timings but Stage 3 in STOP then NORMAL then STOP</span></b><b><span lang=EN-US style='font-size:18.0pt;color:#002060'><o:p></o:p></span></b></p><p class=MsoPlainText><span lang=EN-US style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span style='color:black;mso-fareast-language:FR-CA'><img width=960 height=643 id="Image_x0020_2" src="cid:image002.jpg@01D6971A.557B82F0" alt="Description : LTSPICE timings 13 - normal timings but Stage 3 in STOP then NORMAL then STOP"></span><span lang=EN-CA style='color:black'><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>A ZIP file is yours if interested. PM me if so.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Just unzip the files to a directory and run the simulation.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Around 20 lines of simulation shown.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Cheers !<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Jean-Pierre Desrochers<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'><o:p> </o:p></span></p></div></body></html>