IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Duty-cycle and phase spacing error correction circuit for high-speed serial link
Hyochang KimOok KimChangsik Yoo
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2017 Volume 14 Issue 12 Pages 20170497

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Abstract

Duty cycle and phase spacing of multi-phase clock are converted to an analog voltage by low-pass filtering a clock pulse and quantized by a low-power analog-to-digital converter (ADC). The pull-up and pull-down strengths and the delay of clock buffer are controlled till the duty cycle and phase spacing measured by the ADC become equal to desired values. A prototype has been implemented in a 28-nm CMOS process for a 12-Gbps serial link transceiver and occupies only 0.0014-mm2. Experimental results show the deterministic jitter decreases from 8.12-ps to 0.91-ps by the proposed duty cycle and phase spacing error correction technique. While operating with a 1.0-V supply, the additional power consumed for the duty cycle and phase spacing error correction is only 76-µW.

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© 2017 by The Institute of Electronics, Information and Communication Engineers
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