Time Difference Amplifier with Robust Gain Using Closed-Loop Control

Toru NAKURA; Shingo MANDAI; Makoto IKEDA; Kunihiro ASADA

doi:10.1587/transele.E93.C.303

Special Section on Circuits and Design Techniques for Advanced Large Scale Integration

Time Difference Amplifier with Robust Gain Using Closed-Loop Control

Toru NAKURA, Shingo MANDAI, Makoto IKEDA, Kunihiro ASADA

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Keywords: time difference amplifier, TDA, time to digital converter, TDC, voltage controlled delay line

JOURNAL RESTRICTED ACCESS

2010 Volume E93.C Issue 3 Pages 303-308

DOI https://doi.org/10.1587/transele.E93.C.303

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Abstract

This paper presents a Time Difference Amplifier (TDA) that amplifies the input time difference into the output time difference. Cross coupled chains of variable delay cells with the same number of stages are applicable for TDA, and the gain is adjusted via the closed-loop control. The TDA was fabricated using 65nm CMOS and the measurement results show that the time difference gain is 4.78 at a nominal power supply while the designed gain is 4.0. The gain is stable enough to be less than 1.4% gain shift under ±10% power supply voltage fluctuation.

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