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Integration of radios in SoCs along with digital baseband and application processors is desirable for cost and form-factor reasons. Digital processors are typically implemented in the latest CMOS process to take advantage of the increased density and performance afforded by CMOS scaling. Integration of traditional RF circuits, however, requires accurate RF and passive models that typically lag behind...
A digital outphasing transmitter is presented for 2.4-GHz WiFi. The transmitter consists of two delay-based phase modulators and a 26-dBm integrated switching class-D power amplifier. The delay-based phase modulator delays incoming LO edges with a resolution of 1.4 ps (8 bit) required to meet WiFi requirements. A phase MUX architecture is proposed to implement switching between phases once every LO...
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