Name
Title | ||
|---|---|---|
Vco-Based continuous-Time Sigma Delta ADC Based on a Dual-VCO-quantizer-Loop Structure. |
Abstract | ||
|---|---|---|
This paper explores a continuous time (CT) sigma delta (Sigma Delta) analog-to-digital converter (ADC) based on a dual-voltage-controlled oscillator (VCO)-quantizer-loop structure. A third-order fiter is adopted to reduce quantization noise and VCO nonlinearity. Even-order harmonics of VCO are significantly reduced by the proposed dual-VCO-quantizer-loop structure. The prototype with 10 MHz bandwidth and 400 MHz clock rate is designed using a 0.18 mu m RF CMOS process. Simulation results show that the signal-to-noise ratio and signal-to-noise distortion ratio (SNDR) are 76.9 and 76 dB, respectively, consuming 37 mA at 1.8 V. The key module of the ADC, which is a 4-bit VCO-based quantizer, can convert the voltage signal into a frequency signal and quantize the corresponding frequency to thermometer codes at 400 MS/s. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1142/S0218126613400136 | JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS |
Keywords | Field | DocType |
CT sigma delta ADC,dual VCO quantizer loops,VCO based | Computer science,Control theory,Thermometer,Voltage,Voltage-controlled oscillator,Electronic engineering,Delta-sigma modulation,Harmonics,Bandwidth (signal processing),Quantization (signal processing),Electrical engineering,Clock rate | Journal |
Volume | Issue | ISSN |
22 | SP9 | 0218-1266 |
Citations | PageRank | References |
0 | 0.34 | 6 |
Authors | ||
7 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Z. T. Xu | 1 | 0 | 0.34 |
| X. L. Zhang | 2 | 0 | 0.34 |
| J. Z. Chen | 3 | 0 | 0.34 |
| S. G. Hu | 4 | 0 | 0.68 |
| Q. Yu | 5 | 1 | 0.69 |
| Y. Liu | 6 | 1 | 1.03 |
| W. M. Lim | 7 | 0 | 0.34 |