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RLC Circuit Analysis

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Newbie

RLC Circuit Analysis

By Thomas Devaraj

RLC.png

About this worksheet:

  • Calculates the impedances across frequencies in a RLC passive crossover network 
  • Applicable in electrical engineering, electronics and high-tech industries, speaker design 
  • Performs using Excel, frequency, resistance, capacitance, inductance, angular frequency, reactance, impedance, etc.

This worksheet using PTC Mathcad includes an example of an engineer designing a hi-fi speaker that must meet a certain frequency response. The horizontal trend must be over the whole spectrum of the audible range with a tolerance of +/- 1dB. Because at least two transducers are needed, you must look at the case in which there is both a low and high frequency driver. You can calculate the impedances of each to determine the overall frequency response.  This worksheet uses data from excel and plots the solutions.

Download and explore this worksheet yourself! You can download a free lifetime copy of PTC Mathcad Express and get 30 days of full functionality.

2 REPLIES 2
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Re: RLC Circuit Analysis

Hi

 

I am very new to Matchcad so these questions are very basic:

1. ORIGIN := 1 - What is it for?

2. Why there is an arrow above the absolute values of ZLF, ZHF and ZT?

3. Is "j" a reserve parameter in Matchcad for SQRT(-1)?

 

Thanks

Dat N

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Re: RLC Circuit Analysis

Welcome

ORIGIN defines the starting index of vector and matrix elements. By default it is set to 0.

The arrow is to vectorize an expression.  Look that up in the help.. without vectorization,  using the |x| operator would give the length of the vector, producing a single number. With vectorization the result of that same operator is a vector with the absolute values of each of the elements.

The value i is the imaginary unit, such that i squared results in -1. You can use j for the same.

 

Success! 

Luc

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