P. Ostrovskyy, Y. Borokhovych, Georg Fischer, Hans Gustat, C. Scheytt
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引用次数: 7
摘要
为满足s类功率放大器对功率放大级的要求，设计了一种降低采样频率的四阶带通δ - σ调制器(BDSM)。该调制器采用0.25 um SiGe BiCMOS技术制造，在10_MHz带宽下，以正弦波输入实现43.8 dB信噪比(SNR)，同时在−2.8 V电源下耗散380 mW。对于WCDMA调制信号，调制器显示3%的EVM。
A 2.2 GS/s 900 MHz bandpass delta-sigma modulator for Class-S power amplifier
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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