Title :
An Adaptive ΣΔ modulator for multi-standard hand-held wireless devices
Author :
Morgado, Alonso ; Río, Rocío Del ; De la Rosa, José M.
Author_Institution :
Seville Univ., Sevilla
Abstract :
This paper describes the design and experimental characterization of a 130-nm CMOS cascade SigmaDelta modulator intended for multi-standard wireless telecom systems. Both architectural-and circuital-level reconfiguration strategies are incorporated in the chip in order to adapt its performance to different standard specifications with optimized power dissipation. Measurements show a correct operation for GSM/Blue-tooth/WCDMA standards, featuring a dynamic range of 86.7/81.0/63.3dB and a peak signal-to-(noise+distortion) ratio of 74.0/68.4/52.8 dB within 200kHz/1MHz/4MHz, respectively. The power consumption is 25.2/25.0/44.5 mW, of which 11.0/10.5/24.8 are due to the analog part of the circuit+1.
Keywords :
3G mobile communication; Bluetooth; CMOS analogue integrated circuits; cellular radio; sigma-delta modulation; Bluetooth standards; CMOS analogue integrated circuit; GSM standards; WCDMA standards; adaptive sigma delta modulator; cascade sigma delta modulator; handheld wireless devices; multistandard wireless telecom systems; power 25 mW; power 25.2 mW; power 44.5 mW; power consumption; power dissipation; size 130 nm; Bluetooth; CMOS technology; Capacitors; Energy consumption; GSM; Multiaccess communication; Power dissipation; Sampling methods; Solid state circuits; Telecommunications;
Conference_Titel :
Solid-State Circuits Conference, 2007. ASSCC '07. IEEE Asian
Conference_Location :
Jeju
Print_ISBN :
978-1-4244-1359-1
Electronic_ISBN :
978-1-4244-1360-7
DOI :
10.1109/ASSCC.2007.4425773
