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Practical Transistor Circuits

More Power Amplifiers: Today the easiest way to build a low- to medium-power audio amplifier is to pick an integrated circuit (IC) amplifier from a...

Audio Amplifier Basics

Transistors are the key components in many different kinds of audio preamplifiers, amplifiers, and tone-control circuits. Recent articles in this series have discussed the operation...

Power Amplifier

An audio power amplifier can boost weak signals from a tuner, CD player, or tape deck to fill a room with sound. This article focuses...

Common Collector Amplifier

Common Collector Amplifier: BJT amplifiers are still widely used in modern electronic circuitry. This article focuses on practical variations of the common-collector or emitter-follower amplifier...

“Bipolar Basics” – Part 2

The Bipolar Junction Transistor (BJT) triggered the revolution in modern solid-state electronics in the 1960’s. Although the discrete small-signal BJT has since yielded to the...

“Bipolar Basics” – Part 1

Along with the solid-state diode, the point-contact transistor–invented in 1947 at Bell Labs–started the semiconductor revolution and has gone on the become one of the...

History of the Transistor

Dr. John Bardeen(left), Dr. Walter Brattain(right), and Dr. William Shockley(center) discovered the transistor effect and developed the first device in December, 1947, while the three...

Voltage Rating of a Capacitor

All capacitors have a maximum voltage rating and when selecting a capacitor consideration must be given to the amount of voltage to be applied across...

Bipolar Transistor

Bipolar Transistor Basics In the Diode tutorials we saw that simple diodes are made up from two pieces of semiconductor material, either silicon or germanium...

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