Labs
Labs that complement Microelectronic Circuits, 8th edition:
Labs that complement Analog Integrated Circuit Design:
- MOS device parameter measurement
- Single-stage MOS amplifiers
- Folded-cascode opamp design
- Opamp compensation
The labs reference SPICE models for discrete MOS transistors and a typical opamp.
All Lab is very interesting and catered to the needs of the current scenario for UG students.
I am looking forward to seeing more about Analog IC design through a short-term course. Please let me know, how to access this course on the website.
Besides the model files for MOSFETs, where can I find the model files for BJT and diodes?
Here is a typical model for an NPN transistor:
.model QECL NPN(Is=0.26fA Bf=100 Br=1 Tf=0.1ns Cje=1pF Cjc=1.5pF Va=100)
And here are models of a typical discrete NPN, PNP and diode:
.model Q2N3904 NPN(Is=6.734f Xti=3 Eg=1.11 Vaf=74.03 Bf=416.4 Ne=1.259
+ Ise=6.734f Ikf=66.78m Xtb=1.5 Br=.7371 Nc=2 Isc=0 Ikr=0 Rc=1
+ Cjc=3.638p Mjc=.3085 Vjc=.75 Fc=.5 Cje=4.493p Mje=.2593 Vje=.75
+ Tr=239.5n Tf=301.2p Itf=.4 Vtf=4 Xtf=2 Rb=10)
.model Q2N3906 PNP(Is=1.41f Xti=3 Eg=1.11 Vaf=18.7 Bf=180.7 Ne=1.5 Ise=0
+ Ikf=80m Xtb=1.5 Br=4.977 Nc=2 Isc=0 Ikr=0 Rc=2.5 Cjc=9.728p
+ Mjc=.5776 Vjc=.75 Fc=.5 Cje=8.063p Mje=.3677 Vje=.75 Tr=33.42n
+ Tf=179.3p Itf=.4 Vtf=4 Xtf=6 Rb=10)
.model D1N4148 D(Is=2.682n N=1.836 Rs=.5664 Ikf=44.17m Xti=3 Eg=1.11 Cjo=4p
+ M=.3333 Vj=.5 Fc=.5 Isr=1.565n Nr=2 Bv=100 Ibv=100u Tt=11.54n)
I found these labs fascinating! however I do have a question on the folded cascode lab. Did you simplify the topology for some reason? in the text you mention nodes and transistors that are not there. Thanks for sharing this!!
Yes, you are correct. In fact, this lab does not, strictly speaking, present a folded cascode op amp. However, it illustrates many of the basic principles that are at play in folded cascode op amps as well.