Title :
A 2-bit, 3.1 GS/s, band-pass DSM receiver with 53.7 dB SNDR in 35 MHz bandwidth A single-chip RF-digitizing receiver for cellular active antenna systems
Author :
Karthaus, Udo ; Ahles, S. ; Elmaghraby, Adel ; Wagner, Hannes
Author_Institution :
Ubidyne GmbH, Ulm, Germany
Abstract :
This paper presents a radio frequency (RF) continuous-time band-pass delta sigma modulator (CT BP DSM) receiver realized in a 180 nm SiGe BiCMOS technology. The internal quantizer and feedback DAC resolution is 2 bit. Without applying DAC linearization techniques such as trimming or dynamic element matching, measured performance parameters include an SNR and SNDR in 35 MHz of 56.7 dB and 53.7 dB, respectively. Image rejection across the notch center at a quarter of the clock frequency is at least 76 dB. IIP3 and noise figure are -6.6 dBm and 10 dB, respectively.
Keywords :
BiCMOS digital integrated circuits; Ge-Si alloys; UHF antennas; UHF integrated circuits; active antenna arrays; cellular radio; circuit feedback; clocks; delta-sigma modulation; linearisation techniques; quantisation (signal); radio receivers; BiCMOS technology; DAC linearization technique; RF CT BP DSM receiver; SNDR; SNR; SiGe; band-pass DSM receiver; bandwidth 35 MHz; cellular active antenna systems; clock frequency; feedback DAC resolution; image rejection; noise figure 10 dB; notch center; performance parameters; quantizer; radiofrequency continuous-time band-pass delta sigma modulator receiver; single-chip RF-digitizing receiver; size 180 nm; word length 2 bit; Bandwidth; Clocks; Computed tomography; Radio frequency; Receivers; Signal to noise ratio; Active antenna system (AAS); Analog to digital converter (ADC); Delta sigma modulator (DSM); Radio frequency integrated circuits;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2012 7th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2302-4
Electronic_ISBN :
978-2-87487-026-2
