Lecture22

and vcb a base curr vbc what does it mostly consist e

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: BJT “on” the voltages are: VEB > ____ But, is there a Base current IB?> _ and VCB < _ a Base curr VBC What does it mostly consist E consist But, is there____ (same as ent IB?____). does it mostly E 332 Spring 2013 What of? BJT Design BJT Design Narrow-Base Diode Emitter Current >> Base Current EE 332 Spring 2013 PNP BJT Operation Base current IB (remember the base is n-type): Some electrons ___________ with injected holes. Base current into p+ (forward biased EB). Some electrons injected IB (remember the base is n-type): Few electrons Some electrons ___________ within reverse swept from thermal generation injected holes. Some biased CB junction. electrons injected into p+ (forward biased EB). Few electrons swept from thermal generation in reverse biased CB junction. Base current IB is small, but it’s there. Sign of IB goes against the direction of electron injection (see figure). EE 332 Spring 2013 Base current IB is small, but it’s there. Sign of IB goes against Some electrons injected into p+ (forward biased EB). Bipolar Junction Transistors: Basics Few electron...
View Full Document

This document was uploaded on 02/18/2014.

Ask a homework question - tutors are online