After today’s lesson, it makes me think that students can provide feedback to their teachers. The teacher mentioned, “this Academy lesson is good or the vocabulary lesson is good.” Some students expressed that this Academy is good. I believe this course is beneficial. It is different from other courses I have learned in school. In … Read more
First, write out the four matrices of the state-space model for the two systems separately, then call feedback() to establish the feedback connection, and finally call step() to test the step response curve of the overall system. %% Feedback connection between two state-space systems %% feedback(); %% step(); %%%%%%%%%%% clear all; clc; close all; %%%%%%%%%%%%% … Read more
Acoustic feedback is one of the most troublesome issues in live sound amplification. It can cause regenerated reverberation, severely affecting speech clarity, limiting the improvement of system gain, and causing distortion in sound. When feedback becomes severe, it can lead to self-oscillation, making the entire system unable to function properly and even damaging the speakers … Read more
1 What is an Operational Amplifier An operational amplifier (op-amp) is used to regulate and amplify analog signals. An op-amp is an integrated device that contains multiple stages of amplification circuits, as shown in the figure: The left image shows the in-phase configuration, where the Vn terminal is grounded or at a stable level. When … Read more
These two capacitors are called the load capacitors of the crystal oscillator, connected to the two pins of the oscillator and to ground, typically in the range of tens of picofarads. They affect the resonant frequency and output amplitude of the oscillator, and the supplier usually asks for the load capacitance when ordering the crystal … Read more