Name
Title | ||
|---|---|---|
0.9V, 79.7dB SNDR, 2MHz-BW, Highly linear OTA-less 1-1 MASH VCO-based ΔΣ with a Novel Phase Quantization Noise Extraction Technique |
Abstract | ||
|---|---|---|
In this paper a novel technique is introduced to extract the quantization noise of a multi-phase VCO-based quantizer (VCOQ) in the time domain as a PWM signal. Using this technique, a new highly linear VCO-based 1-1 MASH delta-sigma ADC structure is presented. This architecture does not require any OTA-based analog integrators or power hungry linearization methods. The first stage is a closed loop multi-phase VCO-based voltage-to-phase (V-to-P) converter and the second stage is an open loop multi-phase VCO-based voltage-to-frequency (V-to-F) converter. Using the proposed technique the phase quantization error of the first stage is extracted as a pulse signal and then fed to the second stage. The input of the first VCO is a very small amplitude signal and the input of the second VCO is a two-level PWM signal. Therefore, the VCO non-linearity does not limit the overall ADC performance, mitigating the need for power hungry linearization methods. The prototype achieves 2
<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup>
order noise shaping with a DR/SFDR/SNR/SNDR of 82.7/88.7/80.3/79.7 dB for an input signal BW of 2 MHz. The fabricated design consumes 1.248 mW from a 0.9 V. supply. |
Year | DOI | Venue |
|---|---|---|
2019 | 10.1109/CICC.2019.8780126 | 2019 IEEE Custom Integrated Circuits Conference (CICC) |
Keywords | Field | DocType |
phase quantization error,two-level PWM signal,VCO nonlinearity,power hungry linearization methods,input signal BW,highly linear OTA-less 1-1 MASH VCO-based ΔΣ,multiphase VCO-based quantizer,highly linear VCO-based 1-1 MASH delta-sigma ADC structure,OTA-based analog integrators,closed loop multiphase VCO-based voltage-to-phase converter,open loop multiphase VCO-based voltage-to-frequency converter,phase quantization noise extraction technique,power 1.248 mW,voltage 0.9 V,bandwidth 2.0 MHz | Time domain,Computer science,Pulse-width modulation,Integrator,Spurious-free dynamic range,Electronic engineering,Voltage-controlled oscillator,Noise shaping,Quantization (signal processing),Linearization | Conference |
ISSN | ISBN | Citations |
0886-5930 | 978-1-5386-9396-4 | 0 |
PageRank | References | Authors |
0.34 | 3 | 8 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Hamidreza Maghami | 1 | 2 | 1.72 |
| Pedram Payandehnia | 2 | 8 | 5.51 |
| Hossein Mirzaie | 3 | 0 | 0.34 |
| Ramin Zanbaghi | 4 | 19 | 5.18 |
| Siladitya Dey | 5 | 2 | 1.37 |
| Justin B. Goins | 6 | 1 | 0.68 |
| Kartikeya Mayaram | 7 | 349 | 58.50 |
| Terri S. Fiez | 8 | 167 | 47.25 |