A low-power analog-to-digital converter with digitalized amplifier for PAM systems

Yingchieh Ho*, Chou Ming Kuo, Chau-Chin Su

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, we have proposed a 4-bit 5-GSample/s flash analog-to-digital converter (ADC) for pulse amplitude modulation (PAM) systems. In order to achieve low-power consumptions, digitalized cells for analogue amplifying are developed in the proposed ADC. Digitalized cells reduce power significantly due to using fewer devices as compared to pure analogue designs. A self-biasing circuit is used in the digitalized amplifier can enhance linear amplifying region. Besides, the digitalized amplifier can achieve high speed according to its bandwidth compensation technique. The test chip is implemented with 90nm CMOS Logic and Mixed-Mode 1P9M Low-K Process. The low-power digitalized ADC is operated under 5GSample/s. All the results of post-simulation are demonstrated in a 16-PAM system, and efficient number of bit is 3.9bit. Moreover, INL and DNL are less than 0.5LSB. The power consumption of the ADC is 33.7mW, and the FoM of energy per conversion step is only 0.45pJ. The overall chip area is 0.873mm2.

Original languageEnglish
Title of host publication2014 IEEE 57th International Midwest Symposium on Circuits and Systems, MWSCAS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages109-112
Number of pages4
ISBN (Electronic)9781479941346, 9781479941346
DOIs
StatePublished - 23 Sep 2014
Event2014 IEEE 57th International Midwest Symposium on Circuits and Systems, MWSCAS 2014 - College Station, United States
Duration: 3 Aug 20146 Aug 2014

Publication series

NameMidwest Symposium on Circuits and Systems
ISSN (Print)1548-3746

Conference

Conference2014 IEEE 57th International Midwest Symposium on Circuits and Systems, MWSCAS 2014
CountryUnited States
CityCollege Station
Period3/08/146/08/14

Keywords

  • A/D converter
  • digitalized amplifier
  • inductive peaking
  • Low power
  • pulse amplitude modulation

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