TY - JOUR
T1 - A 10-Bit 2-GS/s DAC-DDFS-IQ-controller baseband enabling a self-healing 60-GHz radio-on-chip
AU - D'Souza, Sandeep
AU - Hsiao, Frank
AU - Tang, Adrian
AU - Tam, Sai Wang
AU - Berenguer, Roc
AU - Chang, Mau-Chung
PY - 2013/7/12
Y1 - 2013/7/12
N2 - A 10-bit 2-GS/s mixed-signal baseband (BB) circuit, which enables a self-healing 60-GHz 4-Gb/s radio-on-chip implemented in a 65-nm complementary metal-oxide semiconductor, is described. The BB circuit autonomously senses and optimizes transmitter (TX) P1dB, OIM3, and image suppression, reducing the yield loss because of process variations. On-chip test tones are generated using a 10-bit 2-GS/s current-steering digital-to-analog converter (DAC) and direct digital frequency synthesizer (DDFS). Using the generated test tones, the aforementioned impairments are measured by an envelope detector at the power amplifier output. Based on this information, the programmable digital IQ phase amplitude and offset controller (IQ-CTRL) in the BB circuit improves the TX image suppression from -32.4 to -42.6 dBc, and digital control signals generated by the on-chip self-healing controller heal the TX PdB and OIM3 from 9.5 to 13.2 dBm and from -32.5 to - 40 dBc, respectively. In terms of achieving the target specifications, namely, TX image suppression < ,-40dBc, OIM3< -40dBc, and P1dB> 10dBm, healing increases yield on ten dies from 0% to 100%. The BB circuit consumes only 49 mW, of which 37 mW comes from the DACs and 12 mW from the DDFS and the IQ-CTRL.
AB - A 10-bit 2-GS/s mixed-signal baseband (BB) circuit, which enables a self-healing 60-GHz 4-Gb/s radio-on-chip implemented in a 65-nm complementary metal-oxide semiconductor, is described. The BB circuit autonomously senses and optimizes transmitter (TX) P1dB, OIM3, and image suppression, reducing the yield loss because of process variations. On-chip test tones are generated using a 10-bit 2-GS/s current-steering digital-to-analog converter (DAC) and direct digital frequency synthesizer (DDFS). Using the generated test tones, the aforementioned impairments are measured by an envelope detector at the power amplifier output. Based on this information, the programmable digital IQ phase amplitude and offset controller (IQ-CTRL) in the BB circuit improves the TX image suppression from -32.4 to -42.6 dBc, and digital control signals generated by the on-chip self-healing controller heal the TX PdB and OIM3 from 9.5 to 13.2 dBm and from -32.5 to - 40 dBc, respectively. In terms of achieving the target specifications, namely, TX image suppression < ,-40dBc, OIM3< -40dBc, and P1dB> 10dBm, healing increases yield on ten dies from 0% to 100%. The BB circuit consumes only 49 mW, of which 37 mW comes from the DACs and 12 mW from the DDFS and the IQ-CTRL.
KW - Digital-to-analog converter (DAC)
KW - direct digital frequency synthesizer (DDFS)
KW - image suppression
KW - millimeter wave
KW - OIM
KW - P
KW - self-healing
KW - transmitter (TX)
UR - http://www.scopus.com/inward/record.url?scp=84882893215&partnerID=8YFLogxK
U2 - 10.1109/TCSII.2013.2268325
DO - 10.1109/TCSII.2013.2268325
M3 - Article
AN - SCOPUS:84882893215
VL - 60
SP - 457
EP - 461
JO - IEEE Transactions on Circuits and Systems I: Regular Papers
JF - IEEE Transactions on Circuits and Systems I: Regular Papers
SN - 1549-8328
IS - 8
M1 - 6553296
ER -