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A Feed-Forward Time Amplifier Using a Phase Detector and Variable Delay Lines
Kiichi NIITSU Naohiro HARIGAI Takahiro J. YAMAGUCHI Haruo KOBAYASHI
IEICE TRANSACTIONS on Electronics
Publication Date: 2013/06/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
time amplifier, feed-forward, CMOS, integrated circuits, design for testability,
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This paper describes a high-speed, robust, scalable, and low-cost feed-forward time amplifier that uses phase detectors and variable delay lines. The amplifier works by detecting the time difference between two rising input edges with a phase detector and adjusting the delay of the variable delay line accordingly. A test chip was designed and fabricated in 65 nm CMOS. The measured resulting performance indicates that it is possible to amplify time difference while maintaining high-speed operation.