用于/spl Sigma//spl Delta/-调制器的1.2 V BiCMOS扩展电流模式积分器

Proceedings of Third International Conference on Electronics, Circuits, and Systems Pub Date : 1996-10-13 DOI:10.1109/ICECS.1996.582786

M. Punzenberger, C. Enz

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引用次数: 5

摘要

提出了一种适用于极低电压/spl σ //spl δ /-变换器的扩展电流模式积分器。该积分器的输入和输出电流都不受偏置电流的限制，因为它工作在AB类。这一特性允许设计具有低偏置电流水平的积分器，因此平均功耗低，仍然能够处理大信号。该积分器工作电压为1.2 V，功耗为21 /spl mu/W。它被用作语音波段应用的一阶/spl Sigma//spl Delta/-转换器的构建块。

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A 1.2 V BiCMOS companding current-mode integrator for /spl Sigma//spl Delta/-modulators

A companding current-mode integrator is proposed for very low voltage /spl Sigma//spl Delta/-converters. Neither the input nor the output current of this integrator is limited by the biasing current as it operates in class AB. This property allows the design of integrators with low biasing current levels and therefore low average power consumption, which are still able to process large signals. The proposed integrator operates at 1.2 V and has a power consumption of 21 /spl mu/W. It is used as a building block for a first order /spl Sigma//spl Delta/-converter for voice-band applications.

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Proceedings of Third International Conference on Electronics, Circuits, and Systems

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