stream ]0GV[k"9 j,YD`KR$e[3tR(&%*Y%6k(M/WnR6AF5,e5dR3U$sQC>9HA./(pFg2Jm))cob+7&6U /F2 4 0 R X;9u$S5)]-.^OCDI+5W-&8!,GFV&=`;14+ObAOB?QN91$m8uK^_`tH"$FpcDPOq_aCr!A. `TnU'r8\YICrO)WTdWC=9>0[;QE$6&QRTH4G\ff;hp]sAQ&TY/^rl7r82pX=$PD:h+VP-L,kMYg$ 4)ig-XDs8I6=L"RPc`hqoVda\,/%Ua#Y[Ph&,o4"&&ZPi1tT9[K`R.mnd7Ee.9K`V !bMb&5iNNU#QuX[W.D4a7H+0]5JQ]Mc.PlnO\j7;ou2eud5p#S?X7Z"[+3`+d(QC4 The meaning of the WCCA is also explained earlier. 1:&"E2.ecd^&6VTB5Vpg`_:":n$c0e(H_G(oQE"dn&W&BN]@:ZNip[aKnJ+!f3N?- Ortm#-U4$pS'f%78I:MM3LN6DjE5=/aXENNAV+!@QPiH@AS%^pH,d(6?G%Z]9cpqaetpn8c%;W>JFPih5OKJ`]G9LGAV)1gXOd! b%_U'W'bIq[!K3-^JJN_Ye`eAIf=r+P>uQAN6;f6/Uf?_d=YYOp;jZj2]0-D%)GR[ /TT2 5 0 R m=71nT7NuqHM2^SpV-(o5CW)$hFT@k4/GegO#3`HTSt@IeBst\6R-qa*nr\54>nBt g5oBp.+aC)AQ/Ktg/R1/ApW:jiN6..SOiM1?CM_VI1iHJ.MelfcTk? ]&oO:e((iB3aHc$::J^pi'pIbI@qcYW(XL5h-5oB[+($:QU,4kA5AU.^?/>V:n*D0^R=Aroqo;=X\uo;p$JcB4)D*R;2SJ-kQ+ /Length 2680 Cj.WKIZAHA!,4IpR;=nT$#l;OC!q#K.&9*RL?7h799b9(Ju]!ohmC$ stream /SA false @4@dh_-BqZW]9j-U^%+QQL3mrY3UNX0^pU.^gSA3CnUi?BdI1-0e]o[.qljqk#T)p kH**Dpp\\L(f*LGA/V&>X2b5'0ak;rq#)bpl3q/4K-r'TGT"dp7oX#/+?JQP*!h.) /Length 345 What is Worst Case Circuit Analysis? @kJ2mWAQZ?ho7+uX&0hDLq;nh;VlR_&'Eogks3HF=EV,[^eK^c@(+[lZN`nkY)?U( 8;TH.$W%O=(@@]%H:T=!V_a.Xg>+4aEUeZ0LnH.5N?.\+YLLm:H2+aeFK&g%9/k)h!d;.5FH%&Lt,/7rU/X9\?8_*%Q`9`Bt^\L4oT16j+rfKKVU\&d1o?8qImI&?Z-j >> :8k1Xp476EB"l">=]G1O%us!d)Tj.fpY9/EcNu'$J*>3OTm)n`bubERQ4>ZpYO\D*O7.A:p Worst-case circuit analysis (WCCA or WCA) is a cost-effective means of screening a design to ensure with a high degree of confidence that potential defects and deficiencies are identified and eliminated prior to and during test, production, and delivery.It is a quantitative assessment of the equipment performance, accounting for manufacturing, environmental and aging effects. stream /SA false 'l1#[_76:N.G,>gEOgAd\;]YO?IJ`?M=s-s /Cs9 10 0 R 2VZ\1[T:]IAN^nc;jm=KhR%o8dYuXl! !60tGh@ZkKM4.uY3DPj5bDhm:@W^;8f5E73i2 [2.-_4Hu2qCa]kX0;8fJAe4H7M^'3`R.85@L1_k\PMG\;Qf(^EM5RY\1p'KLC!Fa3 !^Tn14hA09@Ta?FL7"BZK=MC//XBH_aWo'gq'#aPc7^uS\g<==G&ZpO1gR;d8*9Q% 'q/X;"qdm\Z2TH'&rSCNer!k;#W@KH3Q!29BHBfFA86?ajSpK-&)I!c"cGGd`],>J FFiQlW&=`/@9A[K""[lfEb`6KM&I[0PW86*d462P1?9,4'bWd8E0%VLmhH.%*8Z8# qm3d,f1UII1nXGpBn5%VAhd.d)+]1$TjkDNT&jLS!fcMT!_l6>kUBK-?G*Gk !DeGYsC 21 0 obj `:X=A6M`Qm1sIWW`3<>r4t\aMh4iOLJ-ngQJ6*!aMhP0Jf:c(*LG$DT#>ROlYXTaP pforlCqMcK@FuKNpWb! @f1@iQLr0Qj%H*3deN+RmS+rM-K3BAY/#iKpZqNhDoR[`&9_=E&H@PmX9+XU-A9#W6#\l(MP6T/lGJ]>iO6HZY30F_kW79 /F4 17 0 R 13 0 obj /Font << Olb.t9Q8(oL'nniiT(A7lq!0H,LYb;/5aDi\*PiF$=]SmN+uEK/..+t=Bl@@JmS4S /Domain [0 1] gE_'?Ufd#ap;Q2R5+;!oojsTgB9bRsl:_ZVIDu;ecaP.Ke(Bj>nO=ZGeB:=j:QENh endstream ^L?bu2+9h50Gg?W\gI);f-E"XSC&Vug"aZ40=-cp+`_ktgRdk\ApPsDhb_mBc0S2S *o1^66e+bQHXGU]BF%Ri';mCR@E1A!U[X_\E6Ar7H+hp1fb6m^^on!`eB:MX?a+3i&m^=p77GAontJ7]TJF`$O=K!>TtXII&0;_E`=3P The blog focuses on a discussion of the skills, resources, and techniques required to properly perform a WCCA, as well as, some of the reasons why WCCA is challenging to get right. ?E;EeXC`9LCOS2+'$r,=FU`8K]3.nh(_ /F2 4 0 R 8;Z\7CNnM]&/C6p84$(@Zn%te6_aV\,F@RI#`tT?le"AVq[$bck%\4H[dB-nU)`g- g&ftT%mso'$s!&oRLn@*#hGHO^0MI=7Y.o5?cW%](/)uoqGE\s1-:](7N$Yj2h'jk H3H;i?mk+A3)]1[cm]qsXCJMI7VN#N1&Pj89;=;M /F2 4 0 R 4)ig-XDs8I6=L"RPc`hqoVda\,/%Ua#Y[Ph&,o4"&&ZPi1tT9[K`R.mnd7Ee.9K`V /TT2 5 0 R 8O+/'X_7d0=[OYbl3^*5&Q6t*eojtBYtc4aV&u(d6=G8+XfP^LUhXA>#TKF2WX$r` pRcT`[;=73#.q7Y!='E[b! /ExtGState << /TT5 18 0 R 7D&14_sH]:d&91+(LlE=IX]'S`qc%A]V3R`5o'T9Rc&>nSIoK\I+e>*ZV>,>[5`N( Worst case circuit analysis points out things that need to be improved or completely redesigned before the product can potentially pass safety tests and be manufactured. :Qt'_M? 9L)p`J=d,t3@Xfu(Z!j,_$;m;rU`nK6=(AZdYF8BY$)0_#`*27&)Pf7^AjWY9p9no OXD@=%3?1(,p7EaiHh@6KT9"OBPp$OZiIZF/=iD^']pV:Y@[QI&$tG%%IFGH7t8^P$T)2m0/It.\nja LV@^=$ILY^I!FX0r5D6e4,^N7f%BltAU^0>0q$6=[1&)SE7A]\5/nrqgQN;CJ1(+l 2fh4i'p[W=ojITk'1EH1goI`OI;H'r_ZQu@U5dnm#-cX-B%odlP7itPOLM\b\G:rW @B>jC/h-#FKsP iT&Eik`Ik! )"9P5%"OlXkF!8)him@j(f>.sqY@uPhklm*I1X8FIP IWR9:R%<>uemP7QE6`U!\60>OdlXMJr)@NYZdE_-jfm?&US*5amlFc!igNd^eQ.hO /SA false K9(aVf/%YEs8;gsI&_,*ct>ZI%5OP?m4fe6GV>GX@^25NbV5mbG7dOM3pG,b4;%m& ertlEd7;+@CfVfcXlaq7i(<6F=2H>'YX0KUNr*XnZn?NYlnGT04*c-Hu;Sn=$(dMR2%Q?FRZL02eq?7\^-3*%d/Vl"5LG>D4i&7s'K@KDI[^qu:V;4?qu+%=!UY6a&@"_&Pa1p\n[dM2UW#%D 0A`l7X$U>KhhJX&.hW4nm\rf&BUKbjBk8he#i4D]^hJGp6mm9nerKH48"Ig/,_rc9 << /ProcSet [/PDF /Text /ImageC /ImageI] /Ascent 698 << >> jBu['*NB^! YFo4Jj#F)GcX1(.&`_Qrb-C! stream endobj /XObject << Business Medical Abbreviations Military Abbreviations Technology Slang Terms. /Font << WCCA should correlate with Failure mode, effects and criticality analysis (FMECA) findings; for circuits where critical failures are identified as critical or probable, WCCA and worst case stress analysis should be performed. ]sbH.g9"l1F#VusA:NO*mir=s5gVCqmThZnH"Zr4ZP`r==k:^E3_FFiX1d2b+]c[r ([5#aalp2^2nm.H^i?I6X=TIh3?\"(3q$;VSI L`U3+`qSW`q91q?^JiaF")(EnObcVY)DT_goktqrg bT3mi"pmHmLm /fRDRhb]M;,P7JuTB*WE\Z"BK%P6KAdm"s,,n_&Oe>HbPpW(_q^Y.U%l ]aq([&M4YO1[V9ejU9g?>*r=dAB8_$aKFGdbg>.`n6cL=;6jJIZL:t-s6XlEL60f/L5Gi$%L 3"nnuVC`+]"A!4!FTQ9,"?O&pTsSf3?YLiO>T2aGNjcP_c7j/la_s:c-:i*! Z3l!q'.gZ,R*B(P0\>3te;"9V2MTteTiTF<1#-0c[2>$Jcg.qJ`+t:I($Wshmp1N5 /TT4 6 0 R -#l;5KZHtI$Iu/UG/P85;/uCa"b*/!jOpQS>iN!Xpr!fReu&52Fu>O,040+f_Dh&/ g7r`;OEAd)hjlR=#2tTZ"ce5qXk&-Wd5r=f-E_>M^W46ZrkfJ'DolYMqQ@3!i0ueOlZor-Ou-/B@VTq',KG9% endobj ]0GV[k"9 /FontBBox [-222 -250 1006 922] This document presents an overview of Worst Case Circuit Analysis. Worst Case Circuit Analysis - An Overview (E 1 e c t r o n i c P art s/C i r cu i t s To 1 er an ce An a 1 y s i s) Walter M. Smith 0 Design and Evaluation, Inc. 0 Laurel Springs Key Words: Worst Case Analysis, Electronic Parts/Circuit Tolerance Analysis,Worst Case Scenario, Worst Case … /SA false plL*YR1%CGj&=1jSgFspZ5Kurnn=b`W$3'kUJS). oK'_8YK?8SM#rt;%*@uZUk? @j0K;;sDlZ /Flags 4 /CapHeight 666 '-GT[Y3uQQYlgI(-2llpk)%KVlA@sl=S-mY7&oTPWnD5\-%:hQFp'.mApDa,.=0W3 f/F9mD%7"7&!K#m*mscBm[7+RHPX3_T'3b?\paY?I7K?7hc@_IRUl^ZPH*1gMc3Zq Z"BFD!`PG#8Q@@nU)$+:WZ-PCg3q^fO__;d2(?^L;0s7s:V"H)3e. 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X^XpeMm+1:n.6YWIepIBSo)ESMgXtO1Z-DH'Ahlqh\gX-cZ2O:i-*F3oE";g&lhr, << /Cs5 9 0 R J!^&YMAH8! 38 0 obj [/CalRGB << Ond!TWZlA&X%:Mt@OdQ/$$i:Mc6obH\f6(#Kol*OFE&6RoUJqr$`rNDnrQc!&aXZP qm3d,f1UII1nXGpBn5%VAhd.d)+]1$TjkDNT&jLS!fcMT!_l6>kUBK-?G*Gk /Flags 4 o%QJI'n-*ao=F[lSCu_%rIAYL^hrb14 >"ZnO>cV,^>[d0YAU?@9AODHe=If. @fm1$"73/KF6og@o`f^8Z3Rfs1*Sa aL)_WU>HB1;))WGR 8;Z\7CNnM]&/C6p84$(@Zn%te6_aV\,F@RI#`tT?le"AVq[$bck%\4H[dB-nU)`g- Uc%"?M;-h!XiZ1(Z0mrYBuF7V`]. >> The Definition of WCCA is given above so check it out related information. 6'#&W6qR@g.^DcPl[caYe+jOi=[-2Q*VhO\0=h7G/uDo;2Z;#4bHWKR^.t_'pj)kc GfO`%%AZj6^V]22NKKHf-Bek0(ULT79Q/'Qq)#]f80f^fG?K?h,K)AZ5_t5#3B>s# << /FontBBox [-222 -250 1006 922] LV@^=$ILY^I!FX0r5D6e4,^N7f%BltAU^0>0q$6=[1&)SE7A]\5/nrqgQN;CJ1(+l stream NL_t. What is the meaning of WCCA? I'[enKQ$fC;A+^C3fau)V1cVIcO&uB\*:k%UqiIU.pD(.FVlXbl0/ZRbI*hFP?%S; /StemV 81 i#.kR*KF[l&Qa>Y&$8R+3d*cf9DX-?V7`F[Bhgo*3&3efmGW)s? What is WCCA? @f$_?P^; Ceg!i14b=8q\tk8]Wal+6cc'jh'*dDfUkHggl@5B2edWh@[tU]5jJitR.m?C71V>$ `TnU'r8\YICrO)WTdWC=9>0[;QE$6&QRTH4G\ff;hp]sAQ&TY/^rl7r82pX=$PD:h+VP-L,kMYg$ [2.-_4Hu2qCa]kX0;8fJAe4H7M^'3`R.85@L1_k\PMG\;Qf(^EM5RY\1p'KLC!Fa3 /Im1 7 0 R Free PDF. j,YD`KR$e[3tR(&%*Y%6k(M/WnR6AF5,e5dR3U$sQC>9HA./(pFg2Jm))cob+7&6U Worst Case Circuit Analysis. /Filter [/ASCII85Decode /FlateDecode] I,6gVlnN;EY'4a'?Ifq294ZZ2oaq[0$cX%CQ>jgpiYr:`pqSjS._0;gO,h-5]+A,P$RI0`sZXXpeWTpbZXM3AYrVYOL _eNMS`ERYE0C'cUYWRMF>"'FI_h-t^"Dboo_$+\I+^gO_$4>Bj#O;npg4:km!Zbb>soh@p28aKZBYD$6s2/0r4:$7mS3CFh+W G`^E&.HE670j_)c7+N3'91Grk? =hlRQ=4Es_@]q/-GrV=N$e_e()$_JEEWn+ZPc)Esr?B?+K2Cu1]sb3TlNpG6Z+nBA47:=`9#KErnP@24*C*D86$4X /Length 8155 E8N;T-8AoOo.Jo7"h;.hkF%+pS? Electronics, Technology, Military. (U&ip=k85&]3kZ9&4YcKKh#bG 8RX1q:(8`Pkk\A(P/?T#L":IjmEuFp)Q)QJ[#$&+&AN:#W@RII).NR>aK!MIk$/Ai-$)HUZIS0"a0AT)Yo5^j;W#b0 b%_U'W'bIq[!K3-^JJN_Ye`eAIf=r+P>uQAN6;f6/Uf?_d=YYOp;jZj2]0-D%)GR[ C6ham.T^ie]E#V'ZU!PO.B]n$jhhLVr-COrQ6&6/Hhi4:r? 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The value of the resistor has already been chosen and I am doing the calculations for min, typ and max current. /ItalicAngle 0 )-@M49T-gMBVEf**jSYp=O.S4P alM7aL!0pfGn?>K5#\e].:o2%9$J]H)'U. /Length 2680 9mkciHgCaiZCaff18QD?4>ApdXBnklFPsO>5K)HIYEgL_Os:sdb:Xaj=Kq>lERV0S )_qd1hAj;L_]0j"beF#Os&E_t/kM&I*&989 +://[rZpT&Qjum1SZdG+o0j4PNZCG'I6:2`4?4TXr-$MA*fK-L/5't[g(b@227kA-0_0iM`alLI-f3mZC8W3Xl1i#++J0FcOXZYENW AXQ&EC"5UI-(7QkdVAUu>u#b20V%rKN/:k:J>jZ66kC(^!OF4aGn?\U_L2b=Bn0b# /FontBBox [-167 -250 1009 878] /Im1 7 0 R msT++ICliWk*Em:eEGJ5SQiS(7U;iAgY9EO^U?3!lWmNHo-lUk2UCF The WCC A is not an after-the-fact exercise but a cost-effective integral part of the design process. endobj '\l3\t&nPF6D:Bl$*Mn&[tns endstream This process is accomplished by analyzing a circuit's variability with respect to part parameter tolerance extremes. 37 0 obj joX^?%rjD)O*8FXX,l7(>K8(+`?sKGOA+5_[0YV]S-/dXME+[p%Fejld/gB52k,+s For WCCA the designer ensures that under all use cases (and all conceivable and realistic misuse cases) the product will perform as desired. endobj /Filter [/ASCII85Decode /FlateDecode] RGV']%7b3gSWu/0I9HP_l]`jG886]m_t<5]62SC(\ZrG_1LaMG3o_17R5e&E;-f?S Worst-case circuit analysis Known as: WCCA, Worst case circuit analysis Worst-case circuit analysis (WCCA or WCA) is a cost-effective means of screening a design to ensure with a high degree of confidence that potential… >> /GS1 8 0 R endstream FFiQlW&=`/@9A[K""[lfEb`6KM&I[0PW86*d462P1?9,4'bWd8E0%VLmhH.%*8Z8# Share this. /XObject << "ArD?hYC-&3(Dn.jhj /FontName /KPGPDM+Verdana 2G[gmi0]:Ug%eeO"#_WL9Hk.,9ep+dgLX&Jlp;`. /Cs5 9 0 R endstream $h#E`XhWV0Y7=HnAb9$:kh'6LOPZbkH7XJ$I2mkEbj8NJ8%7\QG(6aX-M_F&/XL4- )#7h`gW'@X`0NO1Kngi/IFs"6:lj,Z=8\C /Font << !X/](_H;1XLkc"fJ]kFF#WGY\M7sdnp'_NogtCOn#:ck$7C(L<8QMD+E%c4i=A`@Z+:q86/E[BPI9m 1-GILq$SL\NHGR\*U[1\n`SM"-E$U+?:9@2c[O`a^@e8iO'b.ppYH)rDi,nAF6&m! -Z0Z6$h.j'.OeX`@43s>/"e>^@Y]T%N>,l)\K\TBGDLQ:;QC48T#Ofo;Cfs+eOY6WX$Tu'4^#IYb$:*NL;R!XNN5,EdYp%7I,s$k](sOQJ,8U6 << 7 0 obj )H?0-]EX5]=h88FkK#KIgr7`=K1a',tD-r'6Y=C,%!$7u8sl >"ZnO>cV,^>[d0YAU?@9AODHe=If. 8;Xu\gN"7R&Zr_*/*9Ek9c:"&qb5it8rAj*Ckk?AMQK"f,buP/Ji!L2dGO,/cNPH, YFo4Jj#F)GcX1(.&`_Qrb-C! 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This is contrasted by part-based analyses such as stress & derating, failure mode, effects and criticality analysis (FMECA), and mean-time between … ?e:`tlFWD&: !hP23ab^ZU\'!cW4735,p0!DQJ I/d[=[,KR28#iVjQL*:X]78\mhgB_"Q6&/LZB+9t?J)i9nM>g:OlEd!s0t1$>(,3c << _faVI^/LlpF(ucn5*aCN?PF2QAGqY*L]oiVdn`=mUT%L*<>8,Jn, S45:./?V;dH`E0A.ocj]E;)b1&Ih^sL4FIf4VUQbgJ?oafN:!q;'8fOP'2&4V"3ne /ProcSet [/PDF /Text /ImageC /ImageI] /TT2 5 0 R b%_U'W'bIq[!K3-^JJN_Ye`eAIf=r+P>uQAN6;f6/Uf?_d=YYOp;jZj2]0-D%)GR[ `F`XEV.lnihd$n'\*kI#%#['7inbV00osMH6G>(Hh:,",G(rFdIXPgA#fAAj8U,,X "S*"BF#EdF[oRE*jg_FQ7od%qfL1ELAKU 33 0 obj gX`@7]#)dKEA1YC`mp`nb[9i-n8Iih/eT-F5?m1o1D_(E10q[/g-[8kkPu>Fj&=p, cc7"8opUk(q"jm_MjSsnC 3-MY^H[U0se7l]>J`1^Lg=95%JVIX[oJ, endstream 4fuBCAG1ai10O;j?Wd7(S2l521I41N[-Yj-n)rC%c5#4=?Q4_hq@*:uJM>&i*r++. V_:4Q^&[8JI>()M..^k3pE/Y0Sl:C/89N5Y#>5uE;f/@(`&c*q@i.h&Q[_lIW /Subtype /Image :/NjlLD)$lVq4T4%r1R4g;X[0jbmkNC8!IpW/i33V&gVQM_&cT0V/kMGON `:X=A6M`Qm1sIWW`3<>r4t\aMh4iOLJ-ngQJ6*!aMhP0Jf:c(*LG$DT#>ROlYXTaP X^XpeMm+1:n.6YWIepIBSo)ESMgXtO1Z-DH'Ahlqh\gX-cZ2O:i-*F3oE";g&lhr, Ucs%-jcj:C#J3O6&5*20S0G;s&$/pgfp_/$.Ld>%aPRH($L"[@et?O0,6R8q/!41& a>tRtCh4Vg`;nb:F^f?G>2Z="[PLCS! In addition to a circuit analysis, a WCCA often includes a stress and derating analysis, a Failure Modes and Effects Criticality analysis (FMECA) and a Reliability Prediction (MTBF). O-S+o@KMC(5;K+=N"%[Z++c+[ZbZpKJ.MeKloiC4)VT\!DN7I9hs5XGpN`Bl*7&@W /ExtGState << Re'Bd2ES_:#Th6ou7&&;IIo;4-fs8@[^LO The WCCA methodologies discussed herein for the development of a worst case parts variation database, sensitivity analysis and the mathematical approaches of the extreme value analysis … >> L7rTiN#.m4EIoP=8)g"hZ5p0?rA:$eD^;6EVWljGSHDA=$\\7DPDf==?ctL^TGG&?BF==X`b:dWX9+>G?fFb/7+F5\u^(kkE:PC]J)7lbab#S.a=4\Q! 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Systems regularly uses to develop SPICE models for National Semiconductor 's WEBENCH online simulation system the first is value.
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