Physics
Video: Emmy Noether and The Fabric of Reality
Noether's theorem that states where there is symmetry there is a conservation
Math
Video:Riemann Hypothesis
Chebycheff said it
And I'll say it again
There is always a prime
Between N and 2N
Electronics
Low Voltage Schmitt Trigger Design in Weak Inversion Using LTSpice
The results of this project are probably wrong. However SPICE and the Schmitt trigger circuit are all set up in the archive. If you find errors in the analysis or get better results somehow please come back and leave a comment detailing the error or linking out to your better analysis.
Low Voltage Schmitt Trigger Project Archive
Research Links
- ECEN4827/5827 Analog IC Design – These notes from a course tell you how to set up a BSIM3v3 model and use in LTSpice circuit.
- Use of the NMOS symbol in LTSpice Local Copy – This link is from the page immediately previous link. It has the specifics of using the library needed to use BSIM3v3
- Introduction to LTSpice , Local Copy: MOSFET Device models used by SPICE (Simulation Program for Integrated Circuit Engineering) simulators can be divided into three classes: First Generation Models (Level 1, Level 2, Level 3 Models), Second Generation Models (BISM, HSPICE Level 28, BSIM2) and Third Generation Models (BSIM3, Level 7, Level 8, Level 49, etc.) The newer generations can do a better job with short channel effects, local stress, transistors operating in the sub-threshold region, gate leakage (tunneling), noise calculations, temperature variations and the equations used are better with respect to convergence during circuit simulation. In general first generation models are recommended for MOSFETs with gate lengths of 10um or more. If not specified most SPICE MOSFET Models default to level=1 (Shichman and Hodges)
- BSIM3v3.2.2 MOSFET Model ( Appears to be "the manual" )
- BSIM3 Archive – files can be downloaded here. However at one point in the LTSPICE documents above they mentioned the MOSFET model or library was modified for usage with LTSPICE. I do not know how much modification was required.
- LTSPICE – Adding components.
References
Notes
- I have verified that the model works below mosfet threshold voltage by simulating an inverter at 0.300 Volts supply voltage.
- Transistor circuits become very slow as you lower their current. Perhaps that is why I think so slowly. I am guessing my neurological system is pretty low voltage.
Additional Links
Quantum-Computing
Video: Google TechTalk: John Preskill: Quantum Computing and the Entanglement Frontier
Near the beginning of the video a crucial point is made. Either of 2 quantum bits by itself does not store any data. It is the correlation between the two bits that hold the data.
Do not forget to wear your quantum sockes.
Electronics
Introduction to Microelectronics with Rambo, Schneider, Djones
This course was notable mainly for Marcio Schneider who has extremely clear Portuguese and a gift for explaining complex topics. His explanation of diode / PN junction being all about the diffusion current was very good.
Marcio Schneider