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 [...]
Tags: ac analysis, ac performance analysis, active loads, bjt current mirror, bjt differential amplifier, BJTS, CMRR, common mode gain, common mode input impedance, common mode rejection ratio, current mirror, current mirrors, dc biasing, Diff Amps, Differential Amplifiers, differential input impedance, differential mode gain, FET, FET Differential Amplifiers, transconductance
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 [...]
Tags: convolutio integral, convolution, convolution integrals, convolution table, convolution tables, impulse response, Linear Systems
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 [...]
Tags: identity matrix, inverse, inverse matrix property, matrix, matrix theory, rref
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 [...]
Tags: coefficient matrix, inverse matrix, matrix, matrix division, matrix multiplication, matrix theory, solving linear systems, using inverse matrices
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 [...]
Tags: Basic Electrical Engineering Concepts, BJT, Cadence, Electrical Engineering, Electrical Engineering Concepts, Engineer, MOSFET, Parallel Resistance Formula, pole, PSPICE, transistor
