PHYS 3050 Chapter Notes -2N3904, Logic Gate, Rise Time

• School: York University
• Department: Physics and Astronomy
• Course: PHYS 3050
• Professor: all

Document Summary

Table of contents: introdction, background, aim, apparatus, analysis, calculations and observations, rise and fall times, a not gate, sources of error, conclusion, references. The transistor, like the diode, utilizes the property of the pn junction in a semiconductor. Unlike the diode, the transistor is a three-port device (with the three ports referred to as the base (b), collector (c), and emitter (e). The collector and the emitter regions are similarly doped (either p-type or n-type) while the base is oppositely doped. Hence there are two types of transistors - so called npn and pnp transistors. The main functions of transistors are as switches and amplifiers. A logic gate performs a logical operation on one or more logic inputs and produces a single logic output. The logic normally performed is boolean logic and is most commonly found in digital circuits. Logic gates are primarily implemented electronically using diodes or transistors: aim.