← 返回 JSSC 论文列表JSSC 2009第12期Data Converters0.13μm CMOS
A 78 dB SNDR 87 mW 20 MHz Bandwidth Continuous-Time 16ADC With VCO-Based Integra
探索在连续时间ADC中使用VCO积分器和量化器,实现高SNR/SNDR性能
78 dB SNDR, 87 mW, 20 MHz带宽
VCOADC连续时间噪声整形CMOS
▸创新点1:采用VCO-based积分器和量化器结构,通过显式利用振荡器的输出相位而非仅频率,解决了早期VCO-based ADC中信号失真的关键问题,显著提升了SNR/SNDR性能(81.2/78.1 dB)。这是电路架构层面的创新。
▸创新点2:提出了一种新型的VCO-based积分器和量化器组合方案,仅需三个基于运放的积分器即可实现四阶噪声整形,降低了系统复杂度并节省了功耗(87 mW@1.5V)。这是系统级拓扑结构的创新。
▸创新点3:在0.13μm CMOS工艺下实现20MHz带宽的高性能ADC,通过优化VCO相位处理技术,在0.45mm²的紧凑面积内同时达成78dB SNDR和低功耗特性,展现了工艺-电路协同设计的创新。
▸创新点4:该结构显著降低抗混叠滤波需求(如摘要所述),适用于多标准无线接收机场景,为下一代软件定义无线电提供硬件基础,属于应用场景创新。
Abstract
CMOS
Matthew Park and Michael H. Perrott , Senior Member , IEEE
Abstract—The use of a VCO-based integrator and quantizer
within a continuous-time (CT) /1/6 analog-to-digital converter
(ADC) structure is explored, and a custom prototype in a 0.13
m
CMOS with a measured performance of 81.2/78.1 dB SNR/SNDR
over a 20 MHz bandwidth while consuming 87 mW from a 1.5 V
supply and occupying an active area of 0.45 mm
/50demonstrated.
A key innovation is the explicit use of the oscillator’s output
phase