John Santiago's Blog – March 2010 Archive (3)

So far we've only talked about dc signals in circuit analysis. These constant signals do not change in time. However, signals must change with time to carry information. The series of videos will cover three basic, time-varying signals used in linear circuits as well as being used to create more complex signal.

An electrical signal such as a current i(t) and voltage v(t) is a…

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As a schematic editor, OrCAD allows you to draw circuit schematics. The program has a nice collection of circuit parts or components to allow you to perform their assignments and laboratory exercises.



PSPICE is an electrical simulator that allows you to model the operation of circuits whose schematic was prepared using ORCAD. Students can now check for correct circuit operation before building the circuit in the lab.



The student version of ORCAD runs PSPICE without leaving… Continue

Here is a short introduction to active filters and its applications. Active filters have comparable frequency selective performance when compared to passive filters. Active filters require power since operational amplifiers are involved to provide gain but do not require inductors since they can be large and lossy, especially for low frequency applications.





Briefly, let's begin the talk about the electric filter invented during World War I. These filters and… Continue