Title :
A 66dB DR 1.2V 1.2mW single-amplifier double-sampling 2nd-order ΔΣ ADC for WCDMA in 90nm CMOS
Author :
Koh, Jinseok ; Choi, Yunyoung ; Gomez, Gabriel
Author_Institution :
Texas Instrum. Inc., Dallas, TX, USA
Abstract :
A single-amplifier double-sampling second-order ΔΣ ADC with 5-level quantization is implemented in 90nm CMOS. To alleviate the capacitor mismatch issues in double sampling techniques, a single capacitor method is introduced, achieving 63dB peak SNDR and 66dB DR in a 1.94MHz bandwidth while consuming 1.2mW from a 1.2V supply.
Keywords :
3G mobile communication; CMOS integrated circuits; UHF amplifiers; analogue-digital conversion; delta-sigma modulation; signal sampling; 1.2 V; 1.2 mW; 1.94 MHz; 90 nm; CMOS; WCDMA; capacitor mismatch; double-sampling ΔΣ ADC; second-order ΔΣ ADC; single-amplifier ΔΣ ADC; Capacitors; Circuits; Delta modulation; Energy consumption; Filters; Multiaccess communication; Operational amplifiers; Quantization; Sampling methods; Transfer functions;
Conference_Titel :
Solid-State Circuits Conference, 2005. Digest of Technical Papers. ISSCC. 2005 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-8904-2
DOI :
10.1109/ISSCC.2005.1493923
