* Copyright © Linear Technology Corp. 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006. All rights reserved. * .subckt level.1 1 2 3 4 5 A1 2 1 0 0 0 0 5 0 OTA G={Avol/Rout} ref={Vos} linear Cout={Cout} en={en} enk={enk} in={in} ink={ink} incm={incm} incmk={incmk} Vhigh=1e308 Vlow=-1e308 Rout={Rout} R5 2 3 {2*Rin} noiseless R6 1 4 {2*Rin} noiseless R1 3 1 {2*Rin} noiseless R2 2 4 {2*Rin} noiseless .param Rout=.1 .param Cout={Avol/GBW/2/pi/Rout} .param Avol=1Meg GBW=10Meg Slew=10Meg ilimit=25m rail=0 Vos=0 .param en=0 enk=0 in=0 ink=0 incm=0 incmk=0 Rin=1G .ends level.1 * .subckt level.2 1 2 3 4 5 S1 5 3 N002 5 Q S2 4 5 5 N002 Q A1 2 1 0 0 0 0 N002 0 OTA G={Avol/Rout} ref={Vos} Iout={slew*Cout} Cout={Cout} en={en} enk={enk} in={in} ink={ink} incm={incm} incmk={incmk} Vhigh=1e308 Vlow=-1e308 C3 5 4 1p C4 3 5 1p R2 N002 4 {2*Rout} noiseless R1 3 N002 {2*Rout} noiseless R3 3 1 {2*Rin} noiseless R4 3 2 {2*Rin} noiseless R5 2 4 {2*Rin} noiseless R6 1 4 {2*Rin} noiseless G1 0 N002 4 N002 table(0 0 10 {2*slew*Cout}) G2 N002 0 N002 3 table(0 0 10 {2*slew*Cout}) .param Rout=100Meg .param Cout={Avol/GBW/2/pi/Rout} .model Q SW(Ron=10 Roff=10Meg Vt=0 Vh=-.1 Vser={Rail} ilimit={Ilimit} noiseless level=2 epsilon={Rail/10}) .param Avol=1Meg GBW=10Meg Slew=10Meg ilimit=25m rail=0 Vos=0 .param en=0 enk=0 in=0 ink=0 incm=0 incmk=0 Rin=1G .ends level.2 * .subckt level.3a 1 2 3 4 5 S1 5 3 N003 5 Q S2 4 5 5 N003 Q A1 2 1 0 0 0 0 N002 0 OTA G={Avol/Rout} ref={Vos} Iout={slew*Cout} Cout={Cout} en={en} enk={enk} in={in} ink={ink} incm={incm} incmk={incmk} Vhigh=1e308 Vlow=-1e308 C3 5 4 1p C4 3 5 1p R3 3 2 {2*Rin} noiseless G1 0 N003 N002 0 {1/Rout} R2 N003 0 {Rout} noiseless C1 N003 0 {X*Cout/Avol} R4 3 1 {2*Rin} noiseless R5 1 4 {2*Rin} noiseless R6 2 4 {2*Rin} noiseless G2 0 N002 4 N002 table(0 0 10 {2*slew*Cout}) G3 N002 0 N002 3 table(0 0 10 {2*slew*Cout}) R1 N002 4 {2*Rout} noiseless R7 3 N002 {2*Rout} noiseless .param Rout=100Meg .param Cout={Avol/GBW/2/pi/Rout} .model Q SW(Ron=10 Roff=10Meg Vt=0 Vh=-.1 Vser={Rail} ilimit={Ilimit} noiseless level=2 epsilon={Rail/10}) .param Avol=1Meg GBW=10Meg Slew=10Meg rail=0 Vos=0 ilimit=25m .param en=0 enk=0 in=0 ink=0 incm=0 incmk=0 Rin=1G phimargin=45 .param X table(phimargin,29.4,3.5,32.1,2.9,33.8,2.6,35.8,2.3,38.1,2,40.9,1.7,43.2,1.5,45.9,1.3,49.2,1.1,53.2,0.9,58.2,0.7,64.7,0.5,73,0.3,86.1,0.05) .ends level.3a * .subckt level.3b 1 2 3 4 5 S1 5 3 N007 5 Q S2 4 5 5 N007 Q A1 2 1 0 0 0 0 N002 0 OTA G={Avol/Rout} ref={Vos} Iout={slew*Cout} Cout={Cout} en={en} enk={enk} in={in} ink={ink} incm={incm} incmk={incmk} Vhigh=1e308 Vlow=-1e308 C3 5 4 1p C4 3 5 1p R3 3 2 {2*Rin} noiseless R4 3 1 {2*Rin} noiseless R5 1 4 {2*Rin} noiseless R6 2 4 {2*Rin} noiseless G2 0 N007 N006 0 10µ R9 0 N007 100K noiseless G1 0 N003 N002 0 {2/Rz} C1 N003 0 {.768*Cd} L1 N003 N004 41.2µ R1 N003 0 {Rz} noiseless R2 N006 0 {Rz} noiseless L2 N004 N005 23.8µ L3 N005 N006 11.04µ C2 N004 0 {.294*Cd} C5 N005 0 {.178*Cd} C6 N006 0 {.0375*Cd} G3 0 N002 4 N002 table(0 0 10 {2*slew*Cout}) G4 N002 0 N002 3 table(0 0 10 {2*slew*Cout}) R7 3 N002 {2*Rout} noiseless R8 N002 4 {2*Rout} noiseless .param Rout=100Meg .param Cout={Avol/GBW/2/pi/Rout} .model Q SW(Ron=10 Roff=10Meg Vt=0 Vh=-.1 Vser={Rail} ilimit={Ilimit} noiseless level=2 epsilon={Rail/10}) .param Avol=1Meg GBW=10Meg Slew=10Meg rail=0 Vos=0 ilimit=25m .param en=0 enk=0 in=0 ink=0 incm=0 incmk=0 Rin=1G phimargin=45 .param delay=(90-MIN(phimargin,89))/360/GBW .param Rz=sqrt(100u/Cd) .param Cd=delay*delay/100u .ends level.3b