Title :
A 50 mW bandpass /spl Sigma//spl Delta/ ADC with 333 kHz BW and 90 dB DR
Author :
Schreier, R. ; Lloyd, J. ; Singer, L. ; Paterson, D. ; Timko, M. ; Hensley, M. ; Patterson, G. ; Behel, K. ; Zhou, J. ; Martin, W.J.
Author_Institution :
Analog Devices Inc., Wilmington, MA, USA
Abstract :
A mixer plus multi-bit bandpass ΣΔ ADC achieves 89 dB and 77 dB SNR in 35 kHz and 333 kHz bandwidths at 273 MHz IF while consuming 16 mA from a 3 V supply. The 6/sup th/-order ADC combines continuous-time LC and active RC resonators with a discrete-time switched-capacitor resonator, and includes an AGC capability. The IC is fabricated in a 0.35 μm BiCMOS process.
Keywords :
BiCMOS integrated circuits; automatic gain control; radio receivers; sigma-delta modulation; 0.35 micron; 16 mA; 273 MHz; 3 V; 333 kHz; 35 kHz; 50 mW; 77 dB; 89 dB; AGC capability; BiCMOS process; LNA; active RC resonators; bandpass /spl Sigma//spl Delta/ ADC; continuous-time LC resonators; discrete-time SC resonator; feedback DAC; mixer; multi-bit A/D converter; portable radio receivers; sigma-delta ADC; switched-capacitor resonator; Band pass filters; Capacitors; Circuit topology; Dynamic range; Energy consumption; High power amplifiers; Impedance; Integrated circuit noise; Noise figure; Receivers;
Conference_Titel :
Solid-State Circuits Conference, 2002. Digest of Technical Papers. ISSCC. 2002 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-7335-9
DOI :
10.1109/ISSCC.2002.993013
