A_Highly_Integrated_Analog_Front-End_for_3G774IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 38, NO. 5, MAY 2003A Highly Integrated Analog Front-End for 3GWaleed Khalil, Tsung-Yuan Chang, Xuewen Jiang, Syed R. Naqvi, Babak Nikjou, and James TsengAbstract―This paper describes a reconfigurable analog front-end (AFE) and audio Codec IC supporting the wideband code division multiple access (WCDMA) standard. The chip is fabricated on Intel’s 0.18- m (SOC) flash logic analog (FLA) process technology using a 0.35- m feature size analog transistor. The transmit path contains a 10-bit segmented rail-to-rail digital-to-analog converter, automatically tunable active RC filter, and programmable gain amplifier (PGA) with self-tuning gain and offset correction circuit. The receive path incorporates a PGA, active RC filter, and an 8-bit analog-……
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