A simple mini stereo amplifier, which based on 2 chips. As pre-amp, there the MC1458 dual op amp, and the LM378 work as dual 4-watt amplifier.
The gain of pre-amp provide by ratio of R3/R1 for the one side, and the other side by R4/R2. In this case, the ratio is about 100, and can be varied by enhanced the ratios. Pin 2 as input from the left channel, and pin 6 as the right one. The output from U1 are coupled through C5/R10 and C3/R6 to U2.
LM378 is a monolithic dual power amplifier, this IC offers high quality performance for stereo stuff. This small item will deliver 4W channel into 8 or 16 Ohm loads.
The MC1458 is high performance monolithic dual operational amplifier intended for a wide range of analog applications. The high gain and wide range of operating voltages provide superior performance in integrator, summing amplifiers and general feedback applicatons.
This circuit using 9V for the fuel and dual 8 Ohm speaker as the driver of the output.
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Mini Stereo Amplifier AnnotationCategory: AMPLIFIERImage Uploaded: 1Image Format: jpg - gifAuthor: TBDate: November 12th, 2011Time: 18:53:29 PM
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