Name
Abstract | ||
|---|---|---|
This paper presents a power-efficient linearization technique based on bulk-modulation for the voltage-to-frequency conversion characteristic of the ring voltage-controlled oscillator (VCO), which can be easily adopted in VCO-based analog-to-digital converters (ADCs) to achieve high resolution. A bulk-control voltage generator is utilized to modulate the threshold voltages of the VCO input transistors. Combined with the conventional gate-control scheme, the nonlinearity of the VCO can be reduced effectively. A second-order sigma-delta ADC with proposed linearized VCO is implemented in 0.18 mu m CMOS technology to verify the effectiveness. Simulation results show the nonlinearity of the VCO drops from 10% to 2% and the total distortion can be reduced by 19dB through bulk-modulation compared with conventional VCO. |
Year | DOI | Venue |
|---|---|---|
2021 | 10.1109/MWSCAS47672.2021.9531742 | 2021 IEEE INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS (MWSCAS) |
Keywords | DocType | ISSN |
Linearization technique, ring VCO, Continuous-Time Sigma-Delta ADC, bulk modulation, VCO-based quantizer | Conference | 1548-3746 |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Qiang Pan | 1 | 0 | 0.34 |
| Yuekang Guo | 2 | 2 | 3.40 |
| Jing Jin | 3 | 3 | 5.49 |
| JianJun Zhou | 4 | 0 | 5.07 |