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A 65-μW 10-kHz BW 804-dB SNDR Gm-C-Based CT Modulator With a Feedback-Assisted
提出一种基于Gm-C的连续时间ΔΣ调制器，用于抗伪影神经记录接口，具有高线性度和低功耗。
65-μW功耗, 10-kHz带宽, 80.4-dB SNDR, 81-dB动态范围, 76-dB CMRR
Gm-C调制器神经记录线性化技术低功耗连续时间ΔΣ调制器
▸反馈辅助Gm线性化技术
▸使用VCO作为第二积分器和相位量化器
▸在第一积分器采用比例积分传输函数
Abstract
This article presents a Gm-C-based continuous-time
delta–sigma modulator (CTDSM) for artifact-tolerant neural
recording interfaces. We propose the feedback-assisted G m lin-
earization technique, which is applied to the first Gm-C integrator
by using a resistive feedback digital-to-analog converter (DAC)
in parallel to the degeneration resistor of the input G
m.T h i s
enables the input G m to process the quantization noise, thereby
improving the input range and linearity of the G m-C-based
CTDSM