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Event-Driven GHz-Range Continuous-Time Digital Signal Processor With Activity-De
提出了一种无时钟、连续时间GHz处理器,采用边缘数字信号编码处理ps级时间间隔的样本。
0.07 mm²面积,0.8–3.2 GHz信号范围,动态范围超过20 dB,功耗1.1至10 mW
GHz处理器连续时间数字信号处理异步滤波动态范围
▸时钟less连续时间处理器:采用无时钟设计,通过事件驱动机制实现GHz范围的连续时间信号处理,突破了传统同步数字电路的速度限制,支持15 ps的超窄时间间隔采样(方法创新)
▸并行数字延迟链:利用多路并行数字延迟链结构实现高速信号的时间对齐与处理,每路延迟链在等待新样本时功耗极低,显著提升了系统能效比(电路创新)
▸可编程电荷泵实现异步滤波:通过可编程电荷泵动态配置滤波参数,结合异步处理机制使系统功耗(1.1-10 mW)随输入信号活动自动调节,在0.8-3.2 GHz范围内实现20 dB动态范围(系统创新)
▸3-bit连续时间闪存ADC集成:将高速闪存ADC与数字处理器单片集成,在0.07 mm²面积内完成六抽头滤波处理,实现模拟/数字混合信号处理的微型化(集成创新)
Abstract
Presented is a clockless, continuous-time (CT) GHz
processor that bypasses some of t he limitations of conventional
digital and analog implementations. Per-edge digital signal en-
coding is used for parallel processing of continuous-time samples
with a temporal spacing as narrow as 15 ps, generated by a 3-b CT
flash ADC. Parallel digital delay chains and programmable charge
pumps realize the asynchronous filtering operation, each con-
suming negligible power while aw aiting a new sample. A six-tap