An Ultra-Low-Voltage, Wide Signal Swing, and Clock-Scalable Dynamic Amplifier Using a Common-Mode Detection Technique


IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E97-A   No.12   pp.2400-2410
Publication Date: 2014/12/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E97.A.2400
Type of Manuscript: Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Circuit Design
clock-scalable,  common-mode voltage detection,  dynamic amplifier,  ultra-low-voltage,  wide signal swing,  

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This paper proposes an ultra-low-voltage, wide signal swing, and clock-scalable differential dynamic amplifier using a common-mode voltage detection technique. The essential characteristics of an amplifier, such as gain, linearity, power consumption, noise, etc., are analyzed. In measurement, the proposed dynamic amplifier achieves a 13dB gain with less than 1dB drop over a differential output signal swing of 340mVpp with a supply voltage of 0.5V. The attained maximum operating frequency is 700MHz. With a 0.7V supply, the gain increases to 16dB with a signal swing of 700mVpp. The prototype amplifier is fabricated in 90nm CMOS technology with the low threshold voltage and the deep N-well options.