过采样转换器运算放大器的优化设计

Proceedings of the ... Custom Integrated Circuits Conference. Custom Integrated Circuits Conference Pub Date : 1996-05-05 DOI:10.1109/CICC.1996.510570

Feng Wang, R. Harjani

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引用次数: 7

摘要

考虑了/spl Sigma//spl Delta/调制器中使用的各种运放的功耗。我们首先对这种调制器中使用的不同运放拓扑进行分类。然后，我们开发了一个通用积分器模型，该模型允许我们比较所有这些拓扑的功耗。我们还推导出了关于功率损耗的最小理论界的表达式。我们用两个设计实例来说明我们的结果:a类和AB类运放。结果表明，a类运放是/spl Sigma//spl Delta/调制器的最佳选择。

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Optimal design of op amps for oversampled converters

The power consumption for various op amps used in /spl Sigma//spl Delta/ modulators is considered. We first classify the different op amp topologies used in such modulators. We then develop a generalized integrator model that allows us to compare the power consumption for all these topologies. We also derive an expression for the minimum theoretical bound on the power dissipation. We illustrate our results with two design examples: a class A and a class AB op amp. It is shown that class A op amps are the best choice for /spl Sigma//spl Delta/ modulators.

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来源期刊

Proceedings of the ... Custom Integrated Circuits Conference. Custom Integrated Circuits Conference

CiteScore

3.80

自引率

0.00%

发文量