Name
Title | ||
|---|---|---|
An Auxiliary-Channel-Sharing Background Distortion and Gain Calibration Achieving >8dB SFDR Improvement over 4<sup>th</sup> Nyquist Zone in 1GS/s ADC |
Abstract | ||
|---|---|---|
This paper presents an auxiliary-channel-assisted background calibration for ADC’s input front-end (buffer + T/H) distortion and inter-stage gain error. The auxiliary channel is custom-designed which runs at a fractional speed of the main ADC with only moderate noise performance but high linearity. It also has a pseudo inter-stage gain characteristic as the main ADC, which incorporates with the multi-layer LMS procedure, facilitating a fast convergence speed. Verified in a 12-bit 1GS/s pipelined SAR ADC in 28nm CMOS, the SNDR and SFDR at Nyquist input are 59.28 dB and 67.09 dB SFDR, respectively. Just the distortion calibrations alone contribute >11.13dB SFDR improvement in the entire Nyquist band. Both the ADCs and input buffers work under a 1V supply, consuming 19.2mW with 17% from the buffer. |
Year | DOI | Venue |
|---|---|---|
2021 | 10.23919/VLSICircuits52068.2021.9492336 | 2021 Symposium on VLSI Circuits |
Keywords | DocType | ISSN |
Background calibration,nonlinearity,pipelined ADC,split-SAR ADC | Conference | 2158-5601 |
ISBN | Citations | PageRank |
978-1-6654-4766-9 | 0 | 0.34 |
References | Authors | |
0 | 9 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Lai Wei | 1 | 0 | 0.34 |
| Zi-Hao Zheng | 2 | 0 | 1.69 |
| Nereo Markulic | 3 | 52 | 9.29 |
| Jorge Lagos | 4 | 18 | 5.57 |
| Ewout Martens | 5 | 75 | 17.77 |
| Yan Zhu | 6 | 0 | 0.34 |
| Chi-hang Chan | 7 | 336 | 48.20 |
| Jan Craninckx | 8 | 6 | 2.86 |
| Rui Paulo Martins | 9 | 43 | 7.21 |