Principles Of Transistor Circuits Introduction To The Design Of Amplifiers Receivers And Digital Circuits Repost New |best|

A common-emitter (bipolar) or common-source (FET) amplifier stage is the building block of everything from guitar pedals to the preamplifiers in your phone.

Provides high voltage gain and moderate current gain, making it the most common configuration. The output is 180∘180 raised to the composed with power out of phase with the input.

A transistor must be "biased" to set its operating point (Q-point) before an AC signal is applied.