N. Barton

TL;DR: The first all-digital PLL and polar transmitter for mobile phones is presented, exploiting the new paradigm of a deep-submicron CMOS process environment by leveraging on the fast switching times of MOS transistors, the fine lithography and the precise device matching, while avoiding problems related to the limited voltage headroom.

TL;DR: A 1.2V 42mA all-digital PLL and polar transmitter for a single-chip GSM/EDGE transceiver is implemented in 90nm CMOS and achieves -165dBc/Hz phase noise at 20MHz offset, with 10 /spl mu/s settling time.

TL;DR: This work proposes and demonstrates the first RF digitally controlled oscillator (DCO) for cellular mobile phones and analyzes the effect of the /spl Sigma//spl Delta/ dithering on the phase noise and shows that it can be made sufficiently small.

TL;DR: The measured phase noise of -167 dBc/Hz at 20 MHz offset from 915 MHz carrier and frequency tuning range of 24.5% proves that this DCO system can be used in SAW-less quad-band transmitters for mobile phones.

TL;DR: The RF transceiver is built on the Digital RF Processor (DRP) technology, and the ADPLL-based transmitter uses a polar architecture with all-digital PM-FM and AM paths.