Direct Digital Modulation and RFDAC for Generation of Frequency Ramps in FMCW Radar

Digital-intensive RFIC design techniques for transmitters in ISSCC 2023

“…Quadrature/polar dual-mode reconfigurable [2] ; wideband DTC/DPC-based phase modulation [3,4] ; sliding digital-IF quadrature DTX [5] Output power Communication range Power combining with stacked device [6,7] ; multiphase beamforming [8] ; IQ cell-sharing [9] Power efficiency Battery life Time-interleaving Doherty class-G [10] ; switched transformer [11] ; multi-subharmonic switching [12] ; class-G [13,14] ; Doherty [15] ; complex-domain Doherty [9] ; hybrid Doherty and impedance boosting [16,17] ; class-G Doherty [18] Linearity Data error rate and modulation type Phase nonlinearity compensation [15] ; switch impedance linearization and code mapping [19] ; ADC background correction [20] ; tri-phasing modulation [21] Signal bandwidth Data rate and license cost Dual-band matching [22,23] ; edge combining class-D [24] ; mm-wave power-DAC [25] ; doubled-edge-triggered RFDAC [26]…”

“…mm-wave wireless transmission with multi-Gb/s data rate also demands wideband signal processing, high system efficiency and high output power for large coverage. In ISSCC 2023, a 71-89 GHz DPA came from University of Electronic Science and Technology of China [26] . In Ref.…”

“…In Ref. [26], the doubleedge-triggered technique is proposed to double the signal bandwidth with limited sampling clock. Besides, the LO leakage suppression and balance-compensated power-combining techniques are introduced to enhance linearity and efficiency.…”