Abstract
The next generation of cellular systems increasingly similar to a data communication system. Not only it transfers voice and multimedia data, it is also been integrated with WLAN to access Internet whenever possible. Thus these cellular systems need highly integrated multi-standard receivers. The design of the A/D converter in such receivers is a big challenge. A reconfigurable /spl sigma//spl delta/ modulator which is suitable for GSM/WCDMA/WLAN standards, is introduced in this paper. According to the different signal bandwidth and dynamic range (DR) specifications, this /spl sigma//spl delta/ modulator is reconfigured to achieve the required dynamic range with less power consumption. The prototype is implemented in TSMC 0.18 /spl mu/m CMOS process with 1.8 V power supply.
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