一个36V电压电流转换器，具有动态元件匹配和自动校准，用于交流纹波减小

2011 Proceedings of the ESSCIRC (ESSCIRC) Pub Date : 2011-10-13 DOI:10.1109/ESSCIRC.2011.6044971

Shagun Bajoria, M. Snoeij, V. Schaffer, Mikhail V. Ivanov, Sijia Wang, K. Makinwa

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引用次数: 0

摘要

介绍了一种适用于0-24mA回路的36V精密电压电流变换器。它利用动态元素匹配(DEM)和自动校准技术来实现低直流误差(0.2%)和低DEM纹波(0.007%)。测量结果表明，自动校准将DEM纹波抑制了14倍，从而消除了对笨重的片外纹波抑制滤波器的需要。该原型芯片采用0.35μm CMOS工艺，占地0.84mm2。在1mA-23mA输出阶跃下，其静态电流为0.5mA，上升时间为10.2μs。

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A 36V voltage-to-current converter with dynamic element matching and auto-calibration for AC ripple reduction

A 36V precision voltage-to-current converter for 0–24mA loops is presented. It utilizes dynamic element matching (DEM) and an auto-calibration technique to achieve low DC inaccuracy (0.2%) and low DEM ripple (0.007%). Measurement results show that the auto-calibration suppresses the DEM ripple by a factor of 14, thus eliminating the need for a bulky off-chip ripple-suppression filter. The prototype chip is implemented in a 0.35μm CMOS process occupying 0.84mm2. It has a quiescent current of 0.5mA and a rise time of 10.2μs for a 1mA–23mA output step.

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2011 Proceedings of the ESSCIRC (ESSCIRC)

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