NPN Transistor Principles and Practical Uses

Posted on February 2, 2017February 16, 2017 by electronicsbeliever

Basic NPN Transistor Principles Universities are covering this topic very well but despite I still attempt to discuss NPN transistor principles that I think easier to understand for non technical peop... Read More

Transistor Operation Mode Determination

Posted on December 9, 2015 by electronicsbeliever

Transistor operation mode is can easily be determined by using mathematical equations. Don’t worry; these are not difficult equations. There are three operation modes to operate the transistor. Thes... Read More

NPN Transistor Biasing Tool and Checker in Excel

Posted on November 18, 2015November 18, 2015 by electronicsbeliever

In this article I will discuss the feature of the NPN transistor biasing tool and checker in excel that I made. This is very useful for design engineers that don’t want to perform simulations and lo... Read More

Fixed Bias Configuration with a Divider Resistor in the Base Complete Analysis

Posted on April 3, 2015May 18, 2015 by electronicsbeliever

This article will uncover the fixed bias configuration with a divider resistor complete analysis. Actually this is another variation of a fixed bias circuit as shown in Figure 87. The only difference... Read More

Complete Analysis of a Fixed Bias Circuit using NPN Transistor

Posted on April 3, 2015October 7, 2015 by electronicsbeliever

This article will uncover the complete analysis of a fixed bias circuit. Figure 73 below shows a simple common emitter configuration. It has a base resistor RB, collector resistor RC but no emitter r... Read More

How to Select a Transistor For Switch and Linear Applications

Posted on February 19, 2015November 26, 2015 by electronicsbeliever

There are few things to consider on how to select a transistor. Specific application requires a perfect match device so that expected functionality will be obtained. For instance, if the application i... Read More

How to Saturate a PNP Transistor

Posted on February 15, 2015October 7, 2015 by electronicsbeliever

PNP transistor is very useful in high side driving. A successful high side driving circuit starts with the proper understanding how to saturate a PNP transistor. Below are the steps to do it. How to S... Read More

How to know if a Transistor is Saturated?

Posted on February 15, 2015October 7, 2015 by electronicsbeliever

There are several ways how to know if a transistor is saturated or not. It is very important that if you design a transistor to function as a switch that it should operate in the saturation and cutoff... Read More

How to Drive a Transistor into Hard Saturation

Posted on November 19, 2014May 18, 2015 by electronicsbeliever

How to drive a transistor into hard saturation? In using a transistor to operate as a switch you must drive it into saturation. Saturation happens when the collector current cannot further increase de... Read More

BJT Operation Modes