A Filtering Delta Sigma ADC for LTE and Beyond

Mattias Andersson, Martin Andersson, Lars Sundström, Sven Mattisson, Pietro Andreani

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract in Undetermined
This paper presents a filtering ADC for the LTE communication standard, where a second-order Delta-Sigma modulator (DSM) is incorporated into the third-order Chebychev channel-select filter (CSF) of the radio receiver. The CSF introduces an additional third-order suppression of both thermal and quantization DSM noise, while the CSF transfer function is maintained. A design method for the filtering ADC accounting for unavoidable DSM-DAC delays is developed and experimentally demonstrated. The 65 nm CMOS prototype is clocked at 576/288 MHz with an 18.5/9.0 MHz LTE bandwidth, has an in-band gain of 26 dB, an SNDR of 56.4/58.1 dB, an input-referred noise of 5 nV/root Hz, and an out-of-band (half-duplex) IIP3 of 20/12 dBV(rms), with a power consumption of 7.9/5.4 mW and an overall state-of-the art performance.
Original languageEnglish
Pages (from-to)1535-1547
JournalIEEE Journal of Solid-State Circuits
Volume49
Issue number7
DOIs
Publication statusPublished - 2014

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering

Free keywords

  • channel-select filter
  • A/D converter
  • continuous-time
  • Delta-Sigma
  • modulator (DSM)
  • filtering A/D converter
  • low-pass filter
  • STF

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