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Mini Amplifier using MOSFET



This is a mini amplifier circuit which build based on MOSFET component. It has been called "mini", but actually this audio amplifier capable to deliver up to 30W power audio output at 4 ohms speaker (18W for 8 ohms load).

Mini MOSFET Amplifier Circuit Diagram


Mini Amplifier using MOSFET

Parts List:
R1 = 2K2
R2 = 27K
R3,R4 = 2K2 Trimpot
R5 = 100R
R6 = 1K
R7,R8 = 330R
C1 = 22µF/25V
C2 = 47pF
C3,C4 = 100µF
C5 = 2200µF
Q1 = BC550C
Q2 = IRF530
Q3 = IRF9530


More explanation about Mini Amplifier using MOSFET: visit this page

About Audio Amplifier
An audio amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain.
The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio amplifiers require these low-level inputs to adhere to line levels.
While the input signal to an audio amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts. More explanation about power audio amplifier can be found at wikipedia.org


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