Design of Stage-Selective Negative Voltage Generator to Improve On-Chip Power Conversion Efficiency for Neuron Stimulation

Shiau Pin Lin, Ming Dou Ker*

*Corresponding author for this work

研究成果: Article同行評審

摘要

Dedicated to neuron stimulation circuits, a stage-selective negative voltage generator is proposed to enhance the overall power efficiency. Since the supplied voltage of the stimulus driver is subject to applications and treatments, an extensive output requirement of supply is demanded to achieve energy-efficient stimulation. The charge pump is implemented as a negative voltage generator for on-chip design. In a limited area, excess power loss is eliminated by reconfiguring the cascaded architecture and clocks. Digitally programmable voltage levels can be outputted by varying the number of stages dynamically. The function of stage selection is achieved by the proposed stage-selective scheme. With appreciate control, the stage-selective negative voltage generator can maintain higher power efficiency under different output voltage levels and loading conditions. The technique improves 40% power conversion ratio at most but only leads to an increment of 8% in area occupation. The measured output voltage covers from-0.3 V to-9.3 V within a maximum 5.5-mA output current, which is verified in a 0.25μm BCD process.

原文English
文章編號9158498
頁(從 - 到)4122-4131
頁數10
期刊IEEE Transactions on Circuits and Systems I: Regular Papers
67
發行號11
DOIs
出版狀態Published - 十一月 2020

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