Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 38,
  • Issue 7,
  • pp. 1777-1784
  • (2020)

A Novel CDR-Based Low-Cost Time-Interleaved-ADC Timing Calibration

Not Accessible

Your library or personal account may give you access

Abstract

Digital signal processing (DSP)-based system is a common architecture for high-speed communication links. One of the most important components for DSP-based architectures is the analog-to-digital convertor (ADC). Most of the high-speed ADCs are implemented as time interleaved ADC (TI-ADC). One of the major challenges in TI-ADC is the timing mismatch between the parallel sub-ADCs. The calibration of this mismatch increases system cost and complexity. In this article we propose a new background calibration method based on existing clock and data recovery (CDR) circuits. The timing mismatch can be calibrated using a simple and unique CDR per sub-ADC. Using the existing phase error detector and pulse gain estimator of the regular CDR, the calibration circuit becomes very low-cost, requiring only a first order loop, and a slow numerically controlled oscillator (NCO). VCSEL-based lab experiments are performed, which demonstrate the proposed method efficiency, performance and robustness.

PDF Article
More Like This
Online digital offset mismatch compensation for high-speed time-interleaved ADC in real-time optical OFDM receiver

Ming Chen, Gang Liu, Long Zhang, Hui Zhou, and QingHui Chen
Opt. Express 27(12) 16650-16660 (2019)

Low in-band spurious arbitrary waveform generator based on a 1-bit time-wavelength interleaved photonic digital-to-analog conversion

Jinghan Yu, Shangyuan Li, Zhuoya Bai, Weichen Hou, Xiaoxiao Xue, Xiaoping Zheng, and BingKun Zhou
Opt. Lett. 49(6) 1393-1396 (2024)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved