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A digital polar transmitter is introduced using 9-b thermometer-coded uniform cells for wideband signal. By analyzing amplitude and phase paths impairment which causes both in-band and out-of-band distortions, a 960-MHz delay tuner is designed for precise amplitude and phase alignment. Furthermore, two digital pre-distortion algorithms for digital power amplifier (DPA) are implemented and compared...
A digital polar transmitter is introduced using 9-b thermometer-coded uniform cells to achieve high linearity for wideband signal. A 960 MHz delay tuner is designed for precise amplitude and phase alignment. An on-chip DC-DC is included for direct battery connection and output power control. Boosted bias improves PA efficiency at low power region. This digital polar transmitter outputs peak power...
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