diff --git a/examples/xspice/see/ihp_simple_sram_seegen_subckt.net b/examples/xspice/see/ihp_simple_sram_seegen_subckt.net new file mode 100644 index 000000000..cff369de2 --- /dev/null +++ b/examples/xspice/see/ihp_simple_sram_seegen_subckt.net @@ -0,0 +1,67 @@ +* Simple SRAM cell in a subcircuit, double exponential current pulses +* IHP Open PDK + +* Path to the PDK +.lib "D:\Spice_general\IHP-Open-PDK\ihp-sg13g2\libs.tech\ngspice\models\cornerMOSlv.lib" mos_tt + +.param vdd = 1.2 +.param deltat=11n deltat2=27n +.param tochar = 1e-13 ; tochar dependency on LET not yet defined +.param talpha = 500p tbeta=20p ; tau in exponent for pulse +.param Inull = 'tochar/(talpha-tbeta)' + +* the voltage sources: +Vdd vd gnd DC 'vdd' +Vwl wl 0 0 PULSE 0 'vdd' 45n 1n 1n 7n 1 +Vbl1 bl1 0 'vdd' +Vbl2 bl2 0 0 + +**** SEE generator without control input, double exponential current sources +aseegen1 NULL [%id(xcell.n1 m1) %id(xcell.n2 m2) %id(xcell.n1 m1) %id(xcell.n2 m2)] seemod1 +.model seemod1 seegen (tdelay = 11n tperiod=25n inull='Inull' talpha='talpha' tbeta='tbeta') +* alternative syntax, if no current measurement required and reference nodes are GND +*aseegen1 NULL [%i(xcell.n1) %i(xcell.n2) %i(xcell.n1) %i(xcell.n2)] seemod1 + +**** the SRAM cell +Xcell bl1 bl2 wl vdd vss srcell + +.subckt srcell bl1 bl2 wl vdd vss +Xnot1 n1 vdd vss n2 not1 +Xnot2 n2 vdd vss n1 not1 +xmo02 n2 wl bl1 vss sg13_lv_nmos l=0.15u w=0.495u as=0.131175p ad=0.131175p ps=1.52u pd=1.52u +xmo01 n1 wl bl2 vss sg13_lv_nmos l=0.15u w=0.495u as=0.131175p ad=0.131175p ps=1.52u pd=1.52u +.ends + +**** Current measurements +Vmeasvss vss 0 0 +Vmeasvdd vd vdd 0 +Vm1 m1 0 0 +Vm2 m2 0 0 + +**** Inverter cell +.subckt not1 a vdd vss z +xm01 z a vdd vdd sg13_lv_pmos l=0.15u w=0.99u as=0.26235p ad=0.26235p ps=2.51u pd=2.51u +xm02 z a vss vss sg13_lv_nmos l=0.15u w=0.495u as=0.131175p ad=0.131175p ps=1.52u pd=1.52u +c3 a vss 0.384f +c2 z vss 0.576f +.ends + +* starting condition for SRAM cell +.ic v(xcell.n2)=0 v(xcell.n1)='vdd' + +* simulation command: +.tran 100ps 120ns + +*.options method=gear + +.control +pre_osdi C:\Spice64\lib\ngspice\psp103_nqs.osdi +run +rusage +*set nolegend +set xbrushwidth=3 +plot i(Vmeasvss) i(Vmeasvdd) +plot xcell.n1 xcell.n2+2 wl+4 i(vm1)*10000+6 i(vm2)*10000+8 +.endc + +.end