← 返回 JSSC 论文列表JSSC 2012第7期Analog Circuits0.13μmOp-Amp
Analysis and Design of a High Speed Continuous-time Modulator Using the Assisted
采用辅助运放技术设计的高速连续时间调制器，实现1 GS/s采样率和15.625 MHz带宽内的10位分辨率。
0.13μm CMOS, 67 dB动态范围, 4 mW功耗
连续时间调制器辅助运放技术高速ADC时序偏差单比特操作
▸辅助运放技术提升线性度和速度
▸针对单比特操作优化的第一积分器设计
▸对反馈和辅助DAC电流时序偏差的鲁棒性分析
Abstract
We apply the “assisted opamp technique” to the
design of a 1 GS/s single-bit continuous-time modulator
(CTDSM) that achieves 10 bit resolution in 15.625 MHz band-
width. The enhanced linearity and speed of th e first integrator of
the modulator, necessitated by sin gle-bit operation, are obtained
in a power ef ficient manner using opam p assistance. However,
timing-skew between the feedback and assi stant DAC currents
can be a potential problem at high speeds. We analyze and give
intuition for the