Title :
A 9MHz filtering ADC with additional 2nd-order ΔΣ modulator noise suppression
Author :
Andersson, Mats ; Anderson, Matthew ; Sundstrom, Lars S. ; Mattisson, Sven ; Andreani, Pietro
Author_Institution :
Dept. of Electr. & Inf. Technol., Lund Univ., Lund, Sweden
Abstract :
This paper presents a filtering ADC for the LTE standard, where a Delta-Sigma modulator (DSM) is merged into the channel-select filter (CSF) of the LTE radio receiver. The CSF introduces an additional 2nd-order suppression of both quantization and thermal DSM noise, while the CSF transfer function is essentially maintained. The 65 nm CMOS prototype is clocked at 288MHz with a 9MHz LTE bandwidth, and has an input-referred noise of 8.1 nV/√Hz, 12 dB gain, and an in/out-of-band IIP3 of 11.5/27 dBVrms, with a power consumption of 11.3mW, resulting in state-of-the-art figure-of-merits (FOMs) for filtering ADCs.
Keywords :
Long Term Evolution; filters; sigma-delta modulation; thermal noise; 2nd-order ΔΣ modulator noise suppression; 2nd-order suppression; CMOS prototype; CSF transfer function; FOMs; LTE radio receiver; LTE standard; channel-select filter; delta-sigma modulator; figure-of-merits; filtering ADC; frequency 288 MHz; frequency 9 MHz; gain 12 dB; power 11.3 mW; quantization; size 65 nm; thermal DSM noise; Cutoff frequency; Gain; Linearity; Noise; Quantization (signal); Thermal noise; Transfer functions;
Conference_Titel :
ESSCIRC (ESSCIRC), 2013 Proceedings of the
Conference_Location :
Bucharest
Print_ISBN :
978-1-4799-0643-7
DOI :
10.1109/ESSCIRC.2013.6649138
