A 9 GS/s 2.1..2.2 GHz bandpass delta-sigma modulator for Class-S power amplifier

Autor:	Ch. Scheytt, Hans Gustat, Y. Manoli, P. Ostrovskyy
Rok vydání:	2009
Předmět:	Engineering business.industry Amplifier Bandwidth (signal processing) Electrical engineering Delta-sigma modulation Silicon-germanium chemistry.chemical_compound Sine wave chemistry Band-pass filter Q factor business Frequency modulation
Zdroj:	2009 IEEE MTT-S International Microwave Symposium Digest.
DOI:	10.1109/mwsym.2009.5165900
Popis:	A tunable fourth-order bandpass delta-sigma modulator (BDSM) designed and fabricated in 0.25 um SiGe BiCMOS technology is presented. The input band can be tuned in a range of 2.1 to 2.2 GHz while clocking at 9 GHz. The modulator achieves 42–43 dB signal-to-noise ratio (SNR) in 10 MHz bandwidth with sine wave input over the tuning range consuming 270 mW from −3 V supply. Measurement results show that the circuit is well suited for Class-S power amplifier applications using WCDMA coding scheme. For a WCDMA modulated signal the modulator demonstrates less than 2.3 % of EVM over the full tuning range.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3cb5f2f46b7a114f5b8cecdf8aca68eb https://doi.org/10.1109/mwsym.2009.5165900 Zobrazit plný text záznamu