助听器用低功耗CMOS d类放大器的设计

2010 2nd Circuits and Systems for Medical and Environmental Applications Workshop (CASME) Pub Date : 2010-12-01 DOI:10.1109/CASME.2010.5706675

Daniel E. Silva Piovani, M. C. Schneider, C. Galup-Montoro

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引用次数: 2

摘要

本研究提出一种低电压、低功耗的d类放大器设计，可应用于助听器。将紧凑的模型方程应用到基于反转电平的设计中，保证了面积、功耗、最小工作电压和频率之间的最佳权衡。通过对商用0.35µm工艺设计的电路进行仿真，验证了系统的正确运行。效率超过75%，输出功率大于最大功率的四分之一时，效率最高可达90.6%。在1.4 V电源下，无负载功耗为68µW，最小工作电压为1.1 V，总谐波失真小于1%。放大器的有效面积约为0.073 mm2。

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Design of a low power CMOS class-D amplifier for hearing aids

This work proposes a design of a class-D amplifier for low voltage operation and reduced power consumption, for application in hearing aid devices. Applying compact model equations to the design based on the inversion level guarantees an optimum trade-off among area, power consumption, minimum operation voltage and frequency. The correct operation of the system was verified through simulations of the circuits designed in commercial 0.35 µm technology. Efficiencies over 75 %, up to a maximum of 90.6 % were achieved for output power greater than one quarter of the maximum power. The power consumption without load is 68 µW at 1.4 V power supply, the minimum operation voltage is 1.1 V, with total harmonic distortion less than 1 %. The amplifier active area is around 0.073 mm2.

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2010 2nd Circuits and Systems for Medical and Environmental Applications Workshop (CASME)

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