MOSFET Basics
Resistivity of a plain old block of silicon
What is a MOSFET but a plain old block of silicon with some terminals printed on it. I start here with the most basic of components. Here are the relevant points: I want to think about N channel MOSFET so I start with P type material doped at Na=10^16 cm^-3 Read more…
LTSpice Math Functions and Manual
Research Links SPICE manual with math functions Expressions can contain the following: Node voltages, e.g., V(n001) Node voltage differences, e.g., V(n001, n002) Circuit element currents; for example, I(S1), the current through switch S1 or Ib(Q1), the base current of Q1. However, it is assumed that the circuit element current is varying quasi-statically, Read more…
Electronics
MOSFET Extraction of Weak Inversion Parameters If: Normalization Current Vt Threshold Current N Body Factor Vp Pinchoff Voltage Lab Using Spice
​ This assignment was very difficult to finish because the lab had only one measurement device and the other teams were taking 3 to 4 days to figure out how to use it. Lab Assignment extraction_ MOSFET_ parameters Unambiguous Extraction of Threshold Voltage Spice Files to dry lab this Read more…
SPICE Circuit Simulator: How to use a Current Controller Current Source
The gotcha here appears to be that you must have a particular type of voltage source – (Behavioral) stuck in where your control current is. See the attached LTSpice file for an example. Current Controlled Current Source Example Circuit
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 Read more…
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 Introduction to Semiconductors PN Junctions Diode Circuits Bipolar Junction Transistors MOSFETS
Electronics
CI Brasil – CT1 Porto Alegre Inscription Open
Inscription Calendar Application Page Calendário CT1 17/04/14 Início da Fase 1 – Abertura das inscrições 22/06/14 Fim da Fase 1 – Fechamento das inscrições. 26/06/14 Início da Fase 2 – Prova online 04/07/14 Fim da Fase 2 – Divulgação dos selecionados 04/07/14 Read more…
Books
Book Review: Professor Van Nostrand: CMOS Analog Design Using All Region MOSFET Modeling
Research Links Cmos Analog Design Using All Region MOSFET Modeling Um Modelo do transistor MOS para projeto de cirdcuitos itegrado The class taught by the author is centered around the ability to scale MOSFET's across technologies using normalization. This is typified by the second question on the test given Read more…
Fiber Optics
RF over Fiber
RF over fiber is where you modulate an RF signal onto the light beam and thus transmit it at a lower loss over a long distance. It is an analog usage as opposed to a digital one as used in data transmission such as an ethernet extender. I have found Read more…