29 lines
521 B
Plaintext
29 lines
521 B
Plaintext
difpair ckt - simple differential pair
|
|
*.width in=72
|
|
.opt acct list node lvlcod=2
|
|
*.tf v(5) vin
|
|
*.dc vin -0.25 0.25 0.005
|
|
*.ac dec 10 1 10ghz
|
|
.tran 5ns 500ns
|
|
vin 1 0 sin(0 0.1 5meg) ac 1
|
|
vcc 8 0 12
|
|
vee 9 0 -12
|
|
q1 4 2 6 qnl
|
|
q2 5 3 6 qnl
|
|
rs1 1 2 1k
|
|
rs2 3 0 1k
|
|
rc1 4 8 10k
|
|
rc2 5 8 10k
|
|
q3 6 7 9 qnl
|
|
q4 7 7 9 qnl
|
|
rbias 7 8 20k
|
|
.model qnl npn(bf=80 rb=100 ccs=2pf tf=0.3ns tr=6ns cje=3pf cjc=2pf
|
|
+ va=50)
|
|
.print dc v(4) v(5)
|
|
.plot dc v(5)
|
|
.print ac vm(5) vp(5)
|
|
.plot ac vm(5) vp(5)
|
|
.print tran v(4) v(5)
|
|
.plot tran v(5)
|
|
.end
|