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IEICE TRANSACTIONS on Electronics

A 0.31 pJ/Conversion-Step 12-Bit 100 MS/s 0.13 µm CMOS A/D Converter for 3G Communication Systems

Young-Ju KIM, Kyung-Hoon LEE, Myung-Hwan LEE, Seung-Hoon LEE

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Summary :

This work describes a 12-bit 100 MS/s 0.13 µm CMOS ADC for 3G wireless communication systems such as two-carrier W-CDMA applications. The proposed ADC employs a four-step pipeline architecture to optimize power consumption and chip area at the target resolution and sampling rate. Area-efficient gate-bootstrapped sampling switches of the input SHA maintain high signal linearity over the Nyquist rate even at a 1.0 V supply. The cascode compensation using a low-impedance feedback path in two-stage amplifiers of the SHA and MDACs achieves the required conversion speed and phase margin with less power consumption and area compared to the Miller compensation. A low-glitch dynamic latch in the sub-ranging flash ADCs reduces kickback noise referred to the input of comparator by isolating the pre-amplifier from the regeneration latch output. The proposed on-chip current and voltage references are based on triple negative TC circuits. The prototype ADC in a 0.13 µm 1P8M CMOS technology demonstrates the measured DNL and INL within 0.38LSB and 0.96LSB at 12-bit, respectively. The ADC shows a maximum SNDR and SFDR of 64.5 dB and 78.0 dB at 100 MS/s, respectively. The ADC with an active die area of 1.22 mm2 consumes 42.0 mW at 100 MS/s and a 1.2 V supply, corresponding to a figure-of-merit of 0.31 pJ/conversion-step.

Publication
IEICE TRANSACTIONS on Electronics Vol.E92-C No.9 pp.1194-1200
Publication Date
2009/09/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E92.C.1194
Type of Manuscript
PAPER
Category
Electronic Circuits

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