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Implemented in a 0.25-m SiGe BiCMOS process, a highly integrated low-power transmitter IC (TxIC) is developed for wideband code-division multiple-access handset applications. Based on a digital-IF heterodyne architecture, it eliminates the external IF surface acoustic wave filter by adopting a meticulous frequency plan and a special-purpose second-order-hold D/A conversion scheme. The TxIC features a low-power high-speed D/A converter designed to drive a dominantly capacitive load. For thedoi:10.1109/jssc.2004.836337 fatcat:h5njdifrrvhujlwoyjabfamhmm