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For those who have kids and have trouble with algebra or to those who just want to sharpen their math skills and help people who find math challenging, here's a resource I found at http://www.algebra.com where there are over 1000 tutors available.

I've used to this resource to help many students. For example, here are over 1200 solutions I've pos… Continue

Here's the first of a series on the z-Transform. Comments are welcomed.

We introduce the z-transform bringing polynomials and rational functions to help analyze linear discrete-time systems. The discrete-time convolution (or FIR convolution) is equivalent to polynomial multiplication and algebraic operations in the z transform domain can be translated as combining or decomposing linear time-invariant (LTI) systems. The most common z-transforms are rational functions, that is, the numerator poly… Continue

In many design instances, we frequently need to connect between circuits requiring an interface. As a result, there are analytical techniques used to handle these situations.

Usually, signals from another circuits feeds into a another part of a circuit, called a load circuit. The one generating the signal is called the source circuit. This interaction between the source and load circuit at the interface is a key design issue.

One of the most valuable analytical tools to help simplifly and deal… Continue

Here is a series of videos on signals and systems. You can also find these videos at http://www.youtube.com/drjctu on the playlists section.

You can view the convolution as the inverse z-Transform of Y(z)=H(z)U(z) where Y(z), H(z), and U(z) are the Laplace Transform of the output response, impulse system response, and input signal, respectively. DVDs are in progress and are based on market demand on selected topics.

Part 1 - Introduction



Part 2 - Discrete-time Convolution Example… Continue