## DC Biasing & AC Performance Analysis of BJT & FET Differential Amplifiers

TweetDC Biasing & AC Performance Analysis of BJT and FET Differential Amplifier Sub-circuits with Active Loads Any op-amp worth its salt has a differential amplifier at its front end, and you’re nobody if you can’t design one yourself.  So, this article presents a general method for biasing and analyzing the performance characteristics of single-stage BJT [...]

## The Convolution Integral Explained

TweetIntroduction to the convolution Amongst the concepts that cause the most confusion to electrical engineering students, the Convolution Integral stands as a repeat offender.  As such, the point of this article is to explain what a convolution integral is, why engineers need it, and the math behind it. In essence, the “convolution” of two functions [...]

## Finding the Inverse of a Matrix

Posted by Luke on Mar 5, 2011 in Basic Electrical Engineering Concepts, Math

TweetMatrix manipulations and properties Finding the inverse of a matrix is much more complex than finding the inverse of a number. All real numbers have an inverse (i.e. ). However, not all matrices have an inverse. There are several characteristics that allow us to visibly determine whether a matrix has an inverse but we will [...]

## Solving a Linear System Using the Inverse Matrix

Posted by Luke on Mar 3, 2011 in Basic Electrical Engineering Concepts, Linear Systems, Math

TweetDescribing the process of solving a linear system using the adjacent matrix is best done while performing an example. Suppose we have a system where is the coefficient matrix of our system, is the column vector containing our variables, and is the solution column vector. We are asked to solve for the column vector made [...]

## Frequency Response for MOSFET/BJT

TweetThe frequency response of a BJT or MOSFET can be found using nearly the exact same process, with the only variations being caused by a single resistor and simple naming conventions that differ between the two devices. Before we start let’s think a little bit about what we’re doing: Our goal is going to be [...]