Title :
A 375 mW Multimode DAC-Based Transmitter With 2.2 GHz Signal Bandwidth and In-Band IM3
58 dBc in 40 nm CMOS
Author :
Spiridon, S. ; van der Tang, J. ; Han Yan ; Hua-Feng Chen ; Guermandi, D. ; Xiaodong Liu ; Arslan, Engin ; van der Goes, Frank ; Bult, Klaas
Author_Institution :
Broadcom Commun. Netherlands B.V., Bunnik, Netherlands
Abstract :
A 40 nm CMOS digital-to-analog converter (DAC) based multimode transmitter (MMTX) is presented. The transmitter can be operated in either narrow- or wideband applications. It has a maximum 2.2 GHz signal bandwidth and exhibits an in-band IM3 of less than - 58 dBc. The MMTX consists of a current-steering DAC with digital sinc equalization and rolloff compensation. By implementing high-speed, feed-forward pipelined digital logic and a distributed decoder, the DAC sampling rate extends to 5 GHz. A distributed regulator approach ensures preservation of the achieved wideband linearity in noisy embedded SoC environments. The MMTX can deliver up to +11 dBm of output power and exhibits 20 dB of analog power backoff with 1 dB steps and a precision better than ±0.1 dB. The MMTX consumes only 375 mW and occupies 1.65 mm2.
Keywords :
decoding; digital-analogue conversion; feedforward; radio transmitters; CMOS digital to analog converter based multimode transmitter; DAC sampling rate; current steering DAC; digital sinc equalization; distributed decoder; distributed regulator; feedforward pipelined digital logic; frequency 2.2 GHz; multimode DAC based transmitter; noisy embedded SoC environment; power 375 mW; rolloff compensation; signal bandwidth; size 40 nm; wideband linearity; Bandwidth; Clocks; Decoding; Latches; Layout; Linearity; Transmitters; CMOS; IM3; current-steering; digital-to-analog converter (DAC); high frequency; high speed; multimode transmitter;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2013.2253219