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首页> 外文期刊>IEEE Journal of Solid-State Circuits >An integrated low-voltage class AB CMOS OTA
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An integrated low-voltage class AB CMOS OTA

机译:集成式低压AB AB CMOS OTA

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摘要

We present a new circuit topology for a low-voltage class AB amplifier. The circuit shows superior current efficiency in the use of the supply current to charge and discharge the output load. It uses negative feedback rather than component matching to optimize current efficiency and performance, resulting in a current boost ratio exactly equal to one. Measurement results for an example circuit fabricated in a 2-/spl mu/m CMOS process are given. The circuit uses a quiescent supply current of 0.2 /spl mu/A and is able to settle to a 1% error in 1.1 ms for a 0.4-V input step and a load capacitance of 35 pF. The circuit design is straightforward and modular, and the core circuit can be used to replace the differential pair of other op-amp topologies.
机译:我们提出了一种用于低压AB类放大器的新电路拓扑。该电路在使用电源电流对输出负载进行充电和放电时显示出出众的电流效率。它使用负反馈而不是组件匹配来优化电流效率和性能,从而使电流升压比正好等于1。给出了以2- / spl mu / m CMOS工艺制造的示例电路的测量结果。该电路使用的静态电源电流为0.2 / spl mu / A,对于0.4V的输入阶跃和35 pF的负载电容,可以在1.1 ms内稳定到1%的误差。电路设计简单,模块化,核心电路可用于替代其他运算放大器拓扑的差分对。

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