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A Low Noise Approach to the Mixer Stage Amplifier

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The first stage of an amplifier is usually the predominan source of noise in the output. If conventional controls are not optimumly adjusted, the mixer stage becomes a potential source of noise. This paper analyzes the conventional methods of signal mixing and presents a novel operational amplifier approach which promises 14 to 20 dB less noise at operating levels.

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AES - Audio Engineering Society