P. Ostrovskyy, Y. Borokhovych, Georg Fischer, Hans Gustat, C. Scheytt
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引用次数: 7
Abstract
A fourth-order bandpass delta-sigma modulator (BDSM) is designed for operating at decreased sampling frequency to relax the requirements of the power amplification stage in Class-S power amplifier. The modulator is fabricated in 0.25 um SiGe BiCMOS technology and achieves 43.8 dB signal-to-noise ratio (SNR) in 10_MHz bandwidth with sine wave input, while dissipating 380 mW from −2.8 V supply. For a WCDMA modulated signal the modulator demonstrates 3 % of EVM.
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