Sophisticated circuitry ensures audio quality in portable calculators

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Sophisticated circuitry ensures audio quality in portable calculators [Copy link]

The challenge of audio design is to make high-performance low-noise analog circuits
coexist with ASICs, processors, and DC/DC converters. The headphone output of a laptop must be able to drive low-impedance loads (such as 32 ohms or 16 ohms) with signal amplitudes up to 1Vrms. This article examines the main parameters that affect
headphone amplifier performance, including PSRR, power-on transient suppression, and PCB ground layout.