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Friday, February 22, 2013

Technology in audio

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Technology in audio
 THE MOST POPULAR CONFIGURATION - COMMON EMITTER MODE
Common emitter mode has
High input impedance
High current gain
High power gain

Amplifier - amplifies electrical signal
Passive components - R, L AND C, transformer
Active components - diode, transistor
In amplifier - passive components fix operating point (dc level) and couple the various stages.
Important parameters of an amplifier:
Input impedance
Output impedance
Current gain
Voltage gain
Power gain

A good amplifier has
High input impedance
Low output impedance
High current gain
High power gain.

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