Title :
A 64QAM 94GHz CMOS transmitter SoC with digitally-assisted power amplifiers and thru-silicon waveguide power combiners
Author :
LaRocca, T. ; Yi-Cheng Wu ; Thai, Khanh ; Snyder, R. ; Daftari, Naveen ; Fordham, Owen ; Rodgers, Peter ; Watanabe, Manabu ; Yang, Yi ; Ardakani, Masoud ; Namoos, Waleed ; Poust, Sumiko ; Chang, Mau-Chung Frank
Author_Institution :
Northrop Grumman Aerosp. Syst., Redondo Beach, CA, USA
Abstract :
A 94GHz 64QAM 1Gbps reconfigurable system-on-chip (SoC) CMOS transmitter with digitally-assisted power amplifiers (DAPA) and back-etched thru silicon waveguide power combiners is presented. The SoC includes a 7M gate ASIC with reconfigurable digital modulation and transmit pre-coding. The ASIC feeds two 10b 1.4GHz current-steering DACs followed by a direct conversion IQ modulator driving eight DAPAs. A 64QAM signal achieves 3.9% EVM with 50dBc ACPR at 94GHz. The data rate is 1.05Gbps and the output power exceeds 10dBm. DC power is 2.1W. The SoC uses IBM 12SOI CMOS.
Keywords :
CMOS analogue integrated circuits; MMIC power amplifiers; elemental semiconductors; etching; modulation coding; modulators; power combiners; precoding; quadrature amplitude modulation; radio transmitters; silicon; silicon-on-insulator; system-on-chip; 64QAM CMOS transmitter SoC; 7M gate ASIC; DAPA; IBM 12SOI CMOS; Si; back-etched thru silicon waveguide power combiner; bit rate 1 Gbit/s; bit rate 1.05 Gbit/s; current-steering DAC; digitally-assisted power amplifier; direct conversion IQ modulator; frequency 1.4 GHz; frequency 94 GHz; power 2.1 W; precoding transmission; reconfigurable digital modulation; storage capacity 10 bit; system-on-chip; CMOS integrated circuits; Computer architecture; Modulation; Power amplifiers; Power combiners; System-on-chip; CMOS technology; Power amplifier; Quadrature amplitude modulation; System-on-a-chip;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2014 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
978-1-4799-3862-9
DOI :
10.1109/RFIC.2014.6851724
