Solving RC Circuit Pulse with Step-by-Step Approach

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Discussion Overview

The discussion revolves around solving an RC circuit problem using a step-by-step approach, specifically focusing on the voltage response over time. Participants are addressing homework-related queries regarding initial conditions and the behavior of the circuit under a pulse input.

Discussion Character

  • Homework-related
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes a solution for the voltage response as v(t) = K1 + K2 * e^(-t/RC) and mentions the need to find V(infinity), V(0+), V(0-), and Rthevenin.
  • Another participant asserts that V(0+) = V(0-) = 0, arguing that the input pulse does not charge the capacitor instantly, only an impulse can achieve that.
  • Some participants inquire about the correctness of the rest of the solution and suggest recalculating the constants K1 and K2 based on the correct initial conditions.
  • There is a suggestion to calculate the response for t > 1s, indicating a need for further analysis beyond the initial conditions.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the initial conditions and the calculations of constants, indicating that there is no consensus on the correctness of the proposed solution. Multiple views on the behavior of the circuit under the given conditions remain present.

Contextual Notes

Limitations include potential missing assumptions about the circuit behavior during the pulse input and the need for clarification on the definitions of initial conditions and time response.

DefaultName
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Hi, I have this problem to do for HW. I did what it asked for, or so I think. I think I may have made a mistake somewhere, it's telling me its not correct. Can you check it out?

BTW, I have to use the step by step approach. I'm assuming my solution will be v(t) = K1 + K2 * e^(-t/RC).
I then find V(infinity), V(0+) and V(0-), Rthevenin.

http://img240.imageshack.us/img240/6569/untitledzn8.png
 
Last edited by a moderator:
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DefaultName said:
Hi, I have this problem to do for HW. I did what it asked for, or so I think. I think I may have made a mistake somewhere, it's telling me its not correct. Can you check it out?

BTW, I have to use the step by step approach. I'm assuming my solution will be v(t) = K1 + K2 * e^(-t/RC).
I then find V(infinity), V(0+) and V(0-), Rthevenin.

http://img240.imageshack.us/img240/6569/untitledzn8.png

V(0+) = V(0-) = 0. The input pulse does not charge the capacitor instantly. Only an impulse can do that.
 
Last edited by a moderator:
ah I see, we haven't hit impulses yet. Is the rest correct?
 
DefaultName said:
ah I see, we haven't hit impulses yet. Is the rest correct?

You must recalculate the constants K1 and K2 for the correct initial condition.
And you must calculate the response for t > 1s.
 

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