tran.sp

self-biased voltage reference

* Bandgap Voltage Reference start up simulation

* Set options
.option post probe
.include cmos06.mod
.param Ls=1.6u L0=3u W1=30u W2=20u r2=45k

m1 13 1 vdd vdd   cmosp w=W1         l=L0 as='Ls*W1' ad='Ls*W1' ps='2*Ls+W1' pd='2*Ls+W1'
m2 3 1 vdd vdd   cmosp w=W1         l=L0 as='Ls*W1' ad='Ls*W1' ps='2*Ls+W1' pd='2*Ls+W1'
m3 4 1 vdd vdd   cmosp w=W1         l=L0 as='Ls*W1' ad='Ls*W1' ps='2*Ls+W1' pd='2*Ls+W1'
m8 1 2 13 vdd     cmosp w=W1         l=L0 as='Ls*W1' ad='Ls*W1' ps='2*Ls+W1' pd='2*Ls+W1'
m9 5 2 3 vdd     cmosp w=W1         l=L0 as='Ls*W1' ad='Ls*W1' ps='2*Ls+W1' pd='2*Ls+W1'
m10 vref 2 4 vdd cmosp w=W1         l=L0 as='Ls*W1' ad='Ls*W1' ps='2*Ls+W1' pd='2*Ls+W1'
m4 7 6 9 vss     cmosn w=W2         l='L0*2' as='Ls*W2' ad='Ls*W2' ps='2*Ls+W2' pd='2*Ls+W2'
m5 12 6 8 vss     cmosn w=W2         l='L0*2' as='Ls*W2' ad='Ls*W2' ps='2*Ls+W2' pd='2*Ls+W2'
m6 2 5 7 vss     cmosn w=W2         l='L0*2' as='Ls*W2' ad='Ls*W2' ps='2*Ls+W2' pd='2*Ls+W2'
m7 6 5 12 vss     cmosn w=W2         l='L0*2' as='Ls*W2' ad='Ls*W2' ps='2*Ls+W2' pd='2*Ls+W2'
Rb1 1 2 142k -1.05e-3
Rb2 5 6 142k -1.05e-3
q1	vss	vss	10	bjtpnp	m=8
q2	vss vss	8	bjtpnp	m=1
q3	vss vss 11	bjtpnp	m=1
r1 9 10 10k	-1.05e-3
r2 vref 11 109.5k	-1.05e-3

*start-up ckt
mst1 st3 6 vdd vdd   cmosp w=0.6u      l=0.6u as='Ls*0.6u' ad='Ls*0.6u' ps='2*Ls+0.6u' pd='2*Ls+0.6u'
mst2 st2 6 vss vss   cmosn w=6u        l=0.6u as='Ls*6u' ad='Ls*6u' ps='2*Ls+6u' pd='2*Ls+6u'
mst3 1 st2 vss vss   cmosn w=6u        l=0.6u as='Ls*6u' ad='Ls*6u' ps='2*Ls+6u' pd='2*Ls+6u'
rst st3 st2 250k -1.05e-3

*compensation cap
c2 vref vss 15p
c1 vdd 1 400f

vss vss 0 0
vdd vdd 0 pwl(0 0 10n 5)
.tran 1n 40u
.probe v(vref) v(vdd) v(st1) v(st2) i(mst1) i(mst2) i(m8) i(r1)

.end