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thuc
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Member warned to use the homework template for posts in the homework sections of PF.
Engineering Problems with First order RC circuit
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The discussion revolves around solving a first-order RC circuit problem involving a switch and a capacitor. The user is confused about part (b) of the question, specifically regarding the behavior of the capacitor after the switch is opened at t=0, noting that the current through the capacitor would be zero in steady state. There is a request for clarification on the initial conditions of the capacitor's voltage and the subsequent charge behavior after the switch opens. Additionally, there are mentions of needing to understand the response of a series RC circuit to a step input and the application of Thevenin's theorem. The conversation emphasizes the importance of understanding the initial voltage and charge dynamics in analyzing the circuit's response.
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Simon Bridge
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The image shows a 12V power source with 2##\Omega## internal resistance connected, in parallel, with a parallel RC circuit (3F and 4##\Omega##) via a switch.
The voltage across the capacitor is labelled ##v_0##.
Part (a) says the switch, open for a long time, is closed at t=0, find ##v_0(t)##.
Part (b) says the switch has been closed for a long time, and is opened at t=0, find ##v_0(t)##.
These two parts normally have a similar method of solution, so please show your method for part (a) so we can see how you are thinking.
For part (b) ... what is physically happening? What is the initial voltage on the capactor, what happens to the charge on the capacitor for t>0?
The voltage across the capacitor is labelled ##v_0##.
Part (a) says the switch, open for a long time, is closed at t=0, find ##v_0(t)##.
Part (b) says the switch has been closed for a long time, and is opened at t=0, find ##v_0(t)##.
These two parts normally have a similar method of solution, so please show your method for part (a) so we can see how you are thinking.
For part (b) ... what is physically happening? What is the initial voltage on the capactor, what happens to the charge on the capacitor for t>0?
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- #4
cnh1995
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Are you familiar with the response of a series RC circuit excited with a step input?thuc said:
Are you familiar with the Thevenin's theorem?
Greetings to all,
I am writing with a question regarding graph generation in LTSpice. I am using LTSpice XVII and am trying to plot AM-AM and AM-PM characterization for a power amplifier, but I haven't been successful yet, likely due to my lack of practice with this specific analysis. I have been using a square wave input at 8.2 MHz as the voltage waveform for my power amplifier. It is said that for a switching amplifier like Class-D, the AM-AM / AM-PM (amplitude-to-amplitude and...
Hi, I am trying to build a RLC low pass filter that atenuates the frequency below 4500 Hz. However, I have encountered some problem when choosing the correct R to work with.
Here is the Circuit
Here is the original sound.
Here is my code in Matlab
function Vout = myFilterCircuit(Vin,h)
n_V = length(Vin);
f_7 = 4470;; % Undesired frequency
h_7 = h; % delta time
% These are for the constant and initialization of the variables
t_7 = 0:h_7:(n_V-1)*h_7; % This is the independent variable...
My solution: v = 2*t + 5*t^2. dx/dt = 2*t + 5*t^2. Therefore dx = (2t + 5t^2)dt. After taking the anti derivative my equation is s = t^2/2 + 5/3(t^3).
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