How Do I Start Designing a Transient Circuit with a 1 ms Time Constant?

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Discussion Overview

The discussion revolves around designing a first-order transient circuit with a specified time constant of 1 ms, specifically for a simulation project involving a square-wave input voltage. The scope includes aspects of circuit design and simulation techniques, with an emphasis on understanding time constants in the context of filters.

Discussion Character

  • Homework-related
  • Technical explanation

Main Points Raised

  • Scott expresses a need for guidance on designing a circuit due to a lack of instruction on transient circuits in class.
  • Some participants suggest that the circuit may involve a first-order filter, questioning whether it is a high-pass or low-pass filter.
  • There is a suggestion to calculate the time constant using a resistor and capacitor in a filter circuit, although it is unclear if Scott has the necessary background knowledge.
  • Scott indicates that the course has not covered time-dependent circuit functions, focusing instead on simplification techniques, node analysis, and amplifiers.
  • Participants inquire if Scott can read ahead in the textbook or seek help from the professor, though Scott notes difficulties in contacting the professor.

Areas of Agreement / Disagreement

Participants do not reach a consensus on how to proceed with the design, and multiple viewpoints regarding the nature of the circuit and the appropriate resources for assistance are present.

Contextual Notes

There is uncertainty regarding the specific requirements of the circuit design, including the type of filter and the application of time constants. Limitations in Scott's current knowledge and resources are also noted.

ScottieK00
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Hey,

I know you have a rule requiring an attempt at the problem before posting here. The trouble is, I have a department required simulation project due this Wednesday and my professor is very behind in her lectures and has yet to even mention transient circuits.

I don't expect this problem to be done for me, but I would REALLY appreciate some tips or preliminary help in getting started.

I am tasked to:
Design a 1st-order circuit having a time constant of 1 ms. Simulate the output voltage for a square-wave input voltage. (Using Microcap to simulate)

This is all the info we are given...with this little of information, I am really at a loss on how to proceed.

Thanks in advance,

Scott
 
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I presume you are talking about a 1st order filter. Is the filter to a high pass or a low pass filter?
Have you studied time constants yet? For instance, given a resistor and capacitor in a filter circuit, can you calculate the time constant.

Can you read ahead to get the information you need or can you ask the professor for help with the problem?
 
I quoted the assignment word for word, so you're guess is as good as mine.

We have not spent one second of class time on time dependent circuit functions. We've covered simplification techniques, node analysis, and amplifiers.

As for asking the professor, she is not very good at responding to emails, so I would have to wait to talk to her tomorrow at class...I would much rather start on it tonight though

any thoughts on how to proceed?
 
Can you read ahead in your text? The rules in this forum are rather strict about giving help without some work by the student.
 

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