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A 65 nm CMOS Class-G headphone driver operates from ??1.4 V, ??0.35 V supplies. At low power level it uses the low voltage supply to reduce the dissipation to 1.63 mW @ Pout = 0.5 mW into 32 ??. At higher power level, the smooth transition between the voltage supply rails allows a THD+N better than -80 dB for Pout ?? 16 mW into 32 ??. The SNR is 101 dB, quiescent power is 0.41 mW and active die area...
A complete analog front-end, with the exclusion of the frequency synthesizer, for FM broadcasting occupies 2.8 mm2 active area in a standard 0.35 mum CMOS technology. The use of current driven passive mixer and switch capacitor polyphase filter gives +100 dBmuV IIP3, 52 dB adjacent channel selectivity and +39 dB image rejection without trimming or tuning. The output noise is 390 nVparradic(Hz), with...
A fully differential 0.35-/spl mu/m CMOS LNA plus mixer, for GPS applications, using no external component apart from an input balun, has been realized. The LNA makes use of an inductively degenerated input stage and a resonant LC load, featuring 12% frequency tuning, accomplished by a MOS varactor. The mixer is a Gilbert cell type in which an NMOS and a PMOS differential pair, shunt together, realize...
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