Work

A 3.3-mW ΣΔ modulator for UMTS in 0.18-μm CMOS with 70-dB dynamic range in 2-MHz bandwidth

Year: 2002

Type: article

Abstract: A quadrature fourth-order, continuous-time, /spl Sigma//spl Delta/ modulator with 1.5-b quantizer and feedback digital-to-analog converter (DAC) for a universal mobile telecommunication system (UMTS) receiver chain is presented. It achieves a dynamic range of 70 dB in a 2-MHz bandwidth and the total harmonic distortion is -74 dB at full-scale input. When used in an integrated receiver for UMTS, the dynamic range of the modulator substantially reduces the need for analog automatic gain control and its tolerance of large out-of-band interference also permits the use of only first-order prefiltering. An IC including an I and Q /spl Sigma//spl Delta/ modulator, phase-locked loop, oscillator, and bandgap dissipates 11.5 mW at 1.8 V. The active area is 0.41 mm/sup 2/ in a 0.18-/spl mu/m 1-poly 5-metal CMOS technology.

Source: IEEE Journal of Solid-State Circuits

DOI: 10.1109/jssc.2002.804329

Authors: R.H.M. van Veldhoven, B.J. Minnis, H.A. Hegt, A.H.M. van Roermund

Institutions: Philips (Netherlands), Signify (Netherlands), Eindhoven University of Technology

Language: English

Topic: Analog and Mixed-Signal Circuit Design

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1521024461

FWCI: 3.783

Cites: 5

Cited by: 38

Related to: 10