alexa A 40.0 GS/S TIME INTERLEAVED 6 BIT FLASH ADC FOR 40GBE APPLICATIONS
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Open Access

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Research Article

A 40.0 GS/S TIME INTERLEAVED 6 BIT FLASH ADC FOR 40GBE APPLICATIONS

Shahir P1 and V. Jean Shilpa2
  1. PG Student, Department of Electronics and Communication, B.S. Abdur Rahman University, Chennai-600048, India
  2. Assistant Professor, Department of Electronics and Communication, B.S. Abdur Rahman University, Chennai-600048, India
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Abstract

This paper presents the analog back end design of a 40-GS/s 6-bit Flash ADC for 40GbE applications. It is designed in a 45 nm CMOS technology on the basis of a 16-fold time-interleaving procedure. In this work a 6-b 2.5 - GS/s flash ADC was designed (which is used for time interleaving) with a time-domain latch interpolation method that reduces the number of dynamic comparators used in the first stage of ADC by half. The reduced number of comparators lowers load capacitance to the sample and hold circuit, power consumption and the overhead of comparator calibration. The measured peak DNL and INL are 0.53 and 0.61 LSB, respectively. The calculated SFDR and SNDR are 42.1 and 33.3 dB, and the power consumption is about 69mW.

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