This is 1.5W audio amplifier circuit design based on wide bandwidth, low distortion power IC SSM2211 from Analog Devices. This circuit is simple, inexpensive and easy to built with only contains few components. MMA025AA SMD-00161 RevC Subject to Change Without Notice 4 of 6 DC Bias: The MMA025AA is biased by applying a positive voltage to the drain (Vdd), then setting the drain current (Idd) using a negative voltage on the gate (Vg1). When zero volts is applied to the gate, the drain to source channel is open; this results in high Idd.

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