ELEC1310 Lecture Notes - Lecture 7: Vehicle Identification Number, Linear Model, Positive Feedback

• School: University of Newcastle
• Department: Electrical Engineering
• Course: ELEC1310
• Professor: Colin Coates

Document Summary

Theory: for any linear network, the load resistance that gives maximum load power is equal to the thevenin resistance of the source, maximum power in the load is therefore. Maximum power transfer is not usually the most efficient power transfer. Power transfer is most efficient when there is a zero load current. Adding a constant power drain (even with no load) Active component (cid:523)needs it"s own power supply(cid:524) Non-linear but can be often treated using linear models. 5 terminal device: 2 inputs, inverting and non-inverting, 1 output, 2 supply voltages. Linear model: resistors, voltage controlled voltage source. Rin is usually very large whereas rout is small. The voltage source is limited by the supply voltages. In between saturation of the voltage, amplifier behaves the same as a linear model. Ideal operational amplifiers have the following characteristics: rout is small 0, rin is very large , g very large , current in = 0.