SC4 Transmitters Power Amplifiers and Digitally Assisted RF.pdf

1、ISSCC 2025 Short CourseAdvances in Wireless and RF Transceiver CircuitsPresentation 4Transmitters:Power Amplifiers and Digitally Assisted RFMorteza AlaviTU Delfts.m.alavitudelft.nl 2025 IEEE ISSCC 2025 Short CourseSC4:“Transmitters:Power Amplifiers and Digitally Assisted RF”1 of 90OutlineoWireless T

2、ransmitters(TX)nImportant Aspects and Building BlocksnVarious ArchitecturesoTX Major IssuesnDouble-Quadrature ModulatornEfficiency-Enhanced TXsnLoad-Resilient TXsnSystem RequirementsoDigital-Intensive TX(DTX)nFundamental PrinciplesoDTX ChallengesnNoise,Sampling Spectral ReplicasnDistortion,Sampling

3、Images oDTX examplesnA 4-way Doherty DTX 2025 IEEE ISSCC 2025 Short CourseSC4:“Transmitters:Power Amplifiers and Digitally Assisted RF”2 of 90OutlineoWireless Transmitters(TX)nImportant Aspects and Building BlocksnVarious ArchitecturesoTX Major IssuesnDouble-Quadrature ModulatornEfficiency-Enhanced

4、TXsnLoad-Resilient TXsnSystem RequirementsoDigital-Intensive TX(DTX)nFundamental PrinciplesoDTX ChallengesnNoise,Sampling Spectral ReplicasnDistortion,Sampling Images oDTX examplesnA 4-way Doherty DTX 2025 IEEE ISSCC 2025 Short CourseSC4:“Transmitters:Power Amplifiers and Digitally Assisted RF”3 of

5、90What is a Wireless Transmitter(TX)?oA wireless TX translates the frequency content of digital baseband signals into the designated carrier frequencynThus,it requires upconverting mixersoMoreover,to combat the transmission path loss,a TX boosts the signals strengthnThus,it requires a power amplifie

6、r(PA)oA TX also must convert the digital baseband data into an analog counterpartnThus,it requires a digital-to-analog converter(DAC)and its low-pass reconstruction filter 2025 IEEE ISSCC 2025 Short Course4 of 90SC4:“Transmitters:Power Amplifiers and Digitally Assisted RF”00+!A TX Building BlocksoA