⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种用于植入式生物医学系统的PWM降压转换器，采用模拟-数字混合控制技术，在45µA至4mA的宽负载范围内实现了超过80%的功率转换效率，解决了传统PFM转换器开关噪声不可预测的问题。
Implantable biomedical systems usually operate in energy-limited environments and exhibit large variation of power consumption ranging from constant lowpower (bio-signal sensing) to sporadic high-power (stimulation and/or burst data transmission) [1]. Thus, energy-efficient switching power converters that can support a wide range of load variation are necessary to meet this requirement. Pulse frequency modulation (PFM) power converters can support this large load variation with a high power-conversion efficiency (PCE) [2]. However, their unpredictable switching noise degrades the power supply integrity and hence deteriorates the signal quality in implantable biomedical systems. Pulse-width modulation (PWM) power converters can provide predictable output spectrum, but their PCE in light loads suffers. Although various techniques have been explored over the past years [3-5], the PCE of the PWM converters is still not adequate for low current levels (<100μA) that most
Sung-Yun Park, Jihyun Cho, Kyuseok Lee, Euisik Yoon
University of Michigan, Ann Arbor, MI