High speed ADCs dedicated for wideband wireless receivers

In this paper the authors presented and discussed the design of different architectures of high-speed analog-to-digital converters (ADCs) dedicated for wideband wireless receivers such as software-defined radio systems. The interest of the authors concerns three different architectures: a pipelined 10-bit, 50 MS/s, a Flash 6-bit, 1-GS/s, and a band-pass sigma-delta 6-bit, 2-GS/s. A first version of the pipelined ADC and the Flash ADC was fabricated. As part of the sigma-delta ADC, a resonator operating at 2-GHz was fabricated. In addition to the design of these ADCs, a PCB card that supports these ADCs within a wireless receiver prototype was designed and tested. The ADCs technology of fabrication is the CMOS 0.18 /spl mu/m for the pipelined and the flash, and the CMOS 0.13 /spl mu/m for the band-pass sigma-delta.

[1]  J. A. Wepman,et al.  Analog-to-digital converters and their applications in radio receivers , 1995, IEEE Commun. Mag..

[2]  Hui Pan,et al.  Spatial filtering in flash A/D converters , 2003 .

[3]  Mohammed Ismail,et al.  Multi-Standard CMOS Wireless Receivers: Analysis and Design , 2002 .

[4]  Behzad Razavi,et al.  Design considerations for direct-conversion receivers , 1997 .

[5]  Mohamad Sawan,et al.  A novel approach for implementing ultra-high speed flash ADC using MCML circuits , 2005, 2005 IEEE International Symposium on Circuits and Systems.

[6]  Atsushi Iwata,et al.  A 400MSPS 8b flash AD conversion LSI , 1987, 1987 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[7]  Maurice G. Bellanger,et al.  A bandpass subsampled delta-sigma modulator for narrowband cellular mobile communications , 1994, Proceedings of IEEE International Symposium on Circuits and Systems - ISCAS '94.

[8]  M. Sawan,et al.  Low power, low voltage, 10bit-50MSPS pipeline ADC dedicated for front-end ultrasonic receivers , 2002, The 14th International Conference on Microelectronics,.

[9]  M. Conta,et al.  A 2-GHz analog-to-digital delta-sigma modulator for CDMA receivers with 79-dB signal-to-noise ratio in 1.23-MHz bandwidth , 2004, IEEE Journal of Solid-State Circuits.