Antonio J. Ginés

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Current System-on-Chip (SoC) designs incorporate anincreasing number of mixed-signal components. Designreuse techniques have proved successful for digital designbut these rules are difficult to transfer to mixed-signal design.A top-down methodology is missing but the low levelof abstraction in designs makes system integration and verificationa very(More)
This paper presents a low-cost digital technique for background calibration of comparator offsets in Pipeline ADCs. Thanks to calibration, comparator offset errors above half the stage least-significant bit (LSB) margin in a unitary redundancy scheme are admissible, thus relaxing comparator design requirements and allowing their optimization for low-power(More)
This paper presents a technique for background calibration of Pipeline ADCs with multi-bit stages, based on an adaptive approach. Different implementations of the LMS algorithm have been studied, concluding that the traditional SS-LMS algorithm has inherent convergenceproblems in high accuracy ADCs that can be solved considering a SD-LMS implementation.
—— In this work a CMOS 1.2V 5GHz low-power voltagecontrolled oscillator (VCO) is proposed. It uses an on-chip biased LC-tank topology and introduces a temperature compensation technique which stabilizes the oscillation amplitude for a robust I/Q generation using a frequency divider-by-2. Compared to a standard design with constant bias, it reduces the(More)
This paper presents a new digital algorithm for full calibration of Pipeline ADCs with digital redundancy. The proposed algorithm corrects both the MDAC gain error of the stage under calibration (SUC) and its non-linear errors. It is based on the modulation of the analogue output of the SUC using a digital control signal to introduce a constant displacement(More)
In this paper, a general description of digital ADC calibration approaches in current state-of-the-art is presented, with particular emphasis in Pipeline converters. The study performs a classification of the existing techniques considering two basic aspects: a) the principle of operation and the particular errors which can be compensated after calibration,(More)
Pipeline Analog to Digital Converters (ADCs) are widely used in applications that require medium to high resolution at high acquisition speed. Despite of their quite simple working principles, they usually form rather complex mixed-signal blocks, particularly if digital correction and calibration are considered. As a result, pipeline converters are(More)