ELEC2133 Lecture Notes - Lecture 5: Voltage Source, Current Source, High High
21 Aug 2018
School
Department
Course
Professor
Document Summary
After this section the student should know: the basic concept of feedback in circuit design, the effect of feedback on a circuit"s performance, how to identify the feedback topology used in a feedback circuit; and, how to analyse a circuit with feedback in order to obtain numerical and analytic values for key circuit parameters. When we refer to feedback", we mean any process where a portion of the output is returned to the input to form part of the system excitation. Ao (open loop gain) and (feedback factor) are unilateral and is independent of the source and load impedances. If we take the feedback signal to be subtracted from the input, we will have, for the input signal: x i x s x f. This means that the output for the amplifier can now be expressed as: x o xa io xa so xa oo xa so o x i o x x x o s x xa s.
