1.5 V 5.0 MHz开关电容电路，1.2 /spl mu/m CMOS，无电压启动器

Proceedings of the IEEE 2001 Custom Integrated Circuits Conference (Cat. No.01CH37169) Pub Date : 2001-05-06 DOI:10.1109/CICC.2001.929715

Lei Wang, S. Embabi, E. Sánchez-Sinencio

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引用次数: 3

摘要

采用1.2 /spl μ m的CMOS工艺，设计制作了全差分开关电容(SC)带通双通器件和4/sup /阶带通/spl Delta/-/spl Sigma/调制器。电源电压为1.5 V，不使用任何电压启动器。两个电路的时钟频率都是5.0 MHz。该带通滤波器在833 KHz的中心频率处Q=8.0, IM3=-52 dB。4/sup /阶带通/spl Delta/-/spl Sigma/调制器在中心频率为1.25 MHz的25 KHz窄带内信噪比为61 dB, IM3<-78 dB。

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1.5 V 5.0 MHz switched capacitor circuits in 1.2 /spl mu/m CMOS without voltage bootstrapper

A fully-differential switched capacitor (SC) bandpass biquad and a 4/sup th/ order bandpass /spl Delta/-/spl Sigma/ modulator were designed and fabricated in 1.2 /spl mu/m CMOS process. The supply voltage is 1.5 V without using any voltage bootstrapper. The clock frequency is 5.0 MHz in both circuits. The bandpass filter had Q=8.0 and IM3=-52 dB at its central frequency of 833 KHz. The 4/sup th/ order bandpass /spl Delta/-/spl Sigma/ modulator had SNR=61 dB and IM3<-78 dB in its narrowband of 25 KHz centered at the central frequency of 1.25 MHz.

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Proceedings of the IEEE 2001 Custom Integrated Circuits Conference (Cat. No.01CH37169)

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