Basic Electronics

Bipolar Junction Transistor (BJT)

A bipolar junction transistor (BJT) is a three-terminal semiconductor device used for amplifying and switching electronic signals. output current, voltage, and/or power are controlled by its input current. A BJT consists of two p–n junctions combined together and uses both electrons and holes as charge carriers, which is where its “bipolar” name comes from.  The … Read more

Transistor

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is one of the most important building blocks of modern electronic circuits. A transistor controls the flow of current — it can allow or block current depending on the input signal applied to it. In simple words, it … Read more

Diode

THe semiconductor diode is formed by simply bringing n and p type materials together (cnstracted from same base Ge or Si). Also called as pn junction diode or crystal diode Diffusion Diffusion current Depletion region/ deplition layer/ space charge region Drift current Under steady state, diffusion current = Drift current. Nett current = 0 for … Read more

Semiconductor

Semiconductor has negative temperater cofficient, means if temperature increase, resistance decrease. in case of conductor the temperature cofficient is positive. Intransic Semiconductor Properties No of Electron = No of Hole Extrinsic Semiconductor Properties Impurity atoms are added (doping) n-type Semiconductors pentavalent impurities atom. > Phosphorus (P), Antimony (s), Arsenic (As), Bismuth (Bi). electron are mejority … Read more