HSPICEIntroduction.ppt

hspice introduction,special program of “analysis and design of analog integrated circuit”,ta: yanlin li,content,before simulation hspice overview case study: op-amp circuit library & model source & stimuli analysis type output files graphic tools further readings,before simulation,what is the characteristic of basic component ? what is the desired function of your design ? what is the input you should give ? which type of analysis do you need spice to do ? how the components parameter affect your design ? which parameter/structure should you control to archive the requirement ?,before using spice tools,before simulation,device knowledge,input & stimuli,design requirements,analysis types,think! think! think!,spice overview,about spice : simulation program with integrated circuit emphasis is a transistor level timing simulation tool developed by uc berkeley widely adopted pspice is a pc version of spice (microsim) and hspice is a version (synopsys) that runs on workstations and larger computers.,hspice overview,basic flow for hspice,hspice overview,hspice overview,hspice data flow,case study,two stage op-amp,.ac,.tran,.dc,av gb cmr vout sr power with 0.6um process,opamp.cir (opamp.inc) demo.lib demo dc: .sp ac : .sp tran: .sp,whole netlist,files organization: .cir, dc, ac, tran,circuit (opamp.cir),* two stage op amp design m1 3 vin1 5 5 cmosn l=1u w=3u m2 4 vin2 5 5 cmosn l=1u w=3u m3 3 3 vdd vdd cmosp l=1u w=15u m4 4 3 vdd vdd cmosp l=1u w=15u m5 5 vbias vss vss cmosn l=1u w=4.5u m6 vout 4 vdd vdd cmosp l=1u w=95u m7 vout vbias vss vss cmosn l=1u w=14u m8 vbias vbias vss vss cmosn l=1u w=4.5u cc vout 4 3pf cl vout 0 10pf ibias vdd vbias 30u vdd vdd 0 5v vss vss 0 0v,case study,case study,instance and element name,node and element naming,case study,units and scale factors,case study,hierarchical structure,case study,hierarchical structure,case study,library & model (.lib),case study,statement syntax,case study,what is corner ?,case study,files (.sp),case study,opampdc.sp opampac.sp opamptran.sp,source & stimuli,independent source value independent source function dependent source,case study,dc, ac,tran,source & stimuli (1),case study,source & stimuli (2),case study,analysis types (control),case study,.op & .dc,case study,ac,case study,transient,case study,tolerance (1),case study,tolerance (2),case study,output commands (1),case study,output command (2),case study,(.print .plot .probe),output command (3),case study,.measure (find when),how to find the exact value of output,delay time, rise time, fall time .measure will help you get these values accurately,.measure tran tcross when v(in) = v(out) cross = 1,hspice interface,here we go,run, run, run,before you look at the result, be sure to think about what we expect to see, then open the awaves with self-confidence.,do not use the computer as a substitute for thinking!,advise from p.e. allen,its dangerous to totally rely on the computer.,case study,output files,case study,subckt xop xop xop xop element 1:m1 1:m2 1:m3 1:m4 model 0:cmosn 0:cmosn 0:cmosp 0:cmosp region saturati saturati saturati saturati id 15.1416u 15.1416u -15.1416u -15.1416u ibs 0. 0. 0. 0. ibd -294.6345f -294.6345f 329.0708f 329.0708f vgs 1.1178 1.1178 -1.1079 -1.1079 vds 2.5099 2.5099 -1.1079 -1.1079 vth 809.0527m 809.0527m -901.6112m -901.6112m,.op result (.lis),case study,.ac results (.lis),case study,gaindb= 6.3203e+01 at= 1.0000e+01 from= 1.0000e+01 to= 1.0000e+08 gain= 1.4460e+03 at= 1.0000e+01 from= 1.0000e+01 to= 1.0000e+08 band= 3.1045e+03 gb= 4.2977e+06 pmargin= 6.4768e+01,output voltage range,case study,graphic tools,case study: ac,time-domain,case study,operating point analysis (.op) manual 10-1 to 10-14 dc analysis (.dc)