Electronic Materials / Chemistry

BJT Circuit and Symbol Conventions

Posted by Luke on Apr 19, 2010 in Basic Electrical Engineering Concepts, Electronic Materials / Chemistry, Electronics, Physics

TweetThe following is an explanation of symbol conventions , voltage polarities and current directions for npn and pnp BJTs. The goal is to help understand these characteristics but not on the physical level of electrons and holes. The following figure shows practical operation of each BJT in the active mode. npn or pnp When looking [...]

Tags: base, BJT, collector, Current, Electronics, emitter, npn, pnp, transistor, voltage

Calculating Electron and Hole Concentrations in a p-n Junction

Posted by Luke on Mar 24, 2010 in Basic Electrical Engineering Concepts, Electronic Materials / Chemistry, Electronics, Physics

TweetCalculating hole and electron concentrations Sometimes it can be complicated understanding and calculating hole and electron concentrations. My intent in this article is to briefly, but thoroughly describe what the variables used in these calculations mean and how to use them. To begin I will introduce our variables concentration of free electrons (donors) concentration of [...]

Tags: acceptor, atom, calculate, concentration, donor, electron, hole, junction, n, n-p, n-type, p, p-n, p-type

Engineersphere.com

BJT Circuit and Symbol Conventions

Calculating Electron and Hole Concentrations in a p-n Junction

Twitter Feed

Recent Posts

Other Resources

Register

Categories