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A 14-b Energy-E fficient BW/Power Scalable CTDSM With a Frequency-Controlled
一种14位能效带宽/功率可调的连续时间ΔΣ调制器，适用于物联网传感器接口。
130nm CMOS, 0.9V, 1MHz采样频率, 85dB峰值SNDR, 46nV/√Hz输入噪声密度
连续时间ΔΣ调制器能效带宽可调Gm-C积分器物联网
▸采用频率控制电流源（FCCS）的Gm-C积分器实现带宽/功率可调
▸多比特量化和死区开关抑制非线性及DAC瞬态毛刺
▸在宽采样频率范围内保持稳定能效和输出摆幅
Abstract
This work presents a 14-bit energy-e fficient band-
width (BW) /power scalable continuous-time delta–sigma mod-
ulator (CTDSM) for sensor interfaces in IoT applications. To
ensure low noise for small input signals and achieve BW /power
scalability, it is built around Gm-C integrators biased via a linear
frequency-controlled current source (FCCS). The FCCS enables
the integrators to maintain a nearly constant output swing and
linearly scalable power consumption across a wide sampling
frequency ( fs