Title :
A 10/20/30/40 MHz feed-forward FIR DAC continuous-time ΔΣ ADC with robust blocker performance for radio receivers
Author :
Loeda, Sebastian ; Harrison, Jeffrey ; Pourchet, Franck ; Adams, Andrew
Author_Institution :
Broadcom Sydney, Sydney, NSW, Australia
Abstract :
The first (single-bit) feed-forward (FF) FIR DAC continuous-time (CT)-ΔΣ ADC is presented for cellular radio applications. It provides a robust loop delay compensation with no performance degradation in the presence of radio out-of-band blockers; a known drawback of FF CT-ΔΣ ADCs. At 20/30/40 MHz operation, the FOM is less than or equal to 36 fJ/conv. At 10 MHz operation, the FOM is 50 fJ/conv. The equivalent FOM for a 20-MHz-only design is 28 fJ/conv. It occupies 0.0194 mm2 in 40 nm CMOS.
Keywords :
CMOS integrated circuits; analogue-digital conversion; cellular radio; delta-sigma modulation; radio receivers; CMOS integrated circuit; cellular radio; continuous-time ΔΣ ADC; feedforward FIR DAC; frequency 10 MHz; frequency 20 MHz; frequency 30 MHz; frequency 40 mHz; radio out-of-band blockers; radio receivers; robust blocker performance; robust loop delay compensation; size 40 nm; Delays; Finite impulse response filters; Gain; Modulation; Noise; Receivers; Robustness; FF CT ΔΣ ADC and FIR DAC; radio blocker performance;
Conference_Titel :
VLSI Circuits (VLSI Circuits), 2015 Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-4-86348-502-0
DOI :
10.1109/VLSIC.2015.7231281
