A 400-Ms/s frequency translating bandpass sigma-delta modulator

Autor:	H. Tao, J.M. Khoury
Rok vydání:	1999
Předmět:	Physics business.industry Electrical engineering Sigma Delta-sigma modulation Signal Loop (topology) Optics CMOS Band-pass filter Baseband Electrical and Electronic Engineering business Electronic circuit
Zdroj:	IEEE Journal of Solid-State Circuits. 34:1741-1752
ISSN:	0018-9200
DOI:	10.1109/4.808899
Popis:	A bandpass /spl Sigma/-/spl Delta/ modulator is described in this paper that uses frequency translation inside the /spl Sigma/-/spl Delta/ modulator loop to take advantage of the attributes of both continuous-time and discrete-time circuits. A CMOS direct-conversion modulator digitizes a 200 kHz intermediate-frequency signal centered at 100 MHz and produces baseband I/Q outputs with a peak signal-to-noise ratio of 54 dB. Images due to I/Q mismatches are suppressed by 50 dB. This 0.35-/spl mu/m digital CMOS chip operates from a 2.7/3.3-V supply, dissipates 330 mW, and occupies 3.2 mm/sup 2/.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13c54740cafd88f23c3bdc4fc8b42143 https://doi.org/10.1109/4.808899 Zobrazit plný text záznamu