EDN

Bipolar Transistor Circuit Design & Analysis, Part 4

In Parts 1, 2, and 3 we took a closer look at calculating “ac” gain and how to desensitize the circuit to temperature and transistor parameter variations. In part 4 we consider the effects of a ...
Electronic Design

Snubber Capacitors Stop Spikes

A snubber circuit limits voltage spikes in power converters. Snubbers are also used in the output of Class-D audio amplifiers for the same reasons (Fig. 1). When the transistor you use to switch the ...
Semiconductor Engineering

Applying a Floating Gate Field Effect Transistor To A Logic-in-Memory Application Circuit Design

A technical paper titled “Analysis of Logic-in-Memory Full Adder Circuit With Floating Gate Field Effect Transistor (FGFET)” was published by researchers at Konkuk University, Korea National ...
Hackaday

Circuit VR: Starting An Amplifier Design

Sometimes I wish FETs had become practical before bipolar transistors. A FET is a lot more like a tube and amplifies voltages. Bipolar transistors amplify current and that makes them a bit harder to ...
Electronic Design

Supercapacitors Power Round-the-Clock Photovoltaic Lighting System

How to build a photovoltaic light system that operates at all times and is maintenance-free. The key role of the supercapacitor in this design. What is the "Joule Thief" circuit? Delivering ...
Purdue University

New transistor design disguises key computer chip hardware from hackers

WEST LAFAYETTE, Ind. — A hacker can reproduce a circuit on a chip by discovering what key transistors are doing in a circuit – but not if the transistor “type” is undetectable. Purdue University ...
EDN

Bipolar Transistor Circuit Design & Analysis, Part 5

In previous parts of this series we reviewed the basic transistor parameters that determine ac voltage gain and practical considerations limiting high gain. The role of a coupling capacitor was ...