OPEX-1: A Discrete OPAMP for Audio

This design showcases a discrete opamp for audio applications.¬† It features very low noise, low distortion and a class A output stage that will deliver 1ppm distortion into¬† a 600 Ohm load at 12 V peak.   OPEX-1 Discrete Opamp

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Augmented Feedback Error Correction (AFEC)

AFEC is a simple technique that augments the feedback of an amplifier to dramatically improve the Large Signal Non-linearity (LSN) distortion performance by up to 20 dB across the audio band. Additionally, AFEC acts to remove any DC offsets and also improve PSRR significantly. Augmenting the feedback in a manner similar to that described in […]

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