IEICE Electronics Express | |
An energy-efficient multistage charge pump for MEMS microphone | |
Rongshan Wei1  Jue Wang1  | |
[1] College of Physics and Information Engineering, Fuzhou University | |
关键词: charge pump; MEMS microphone; body effect; threshold voltage; | |
DOI : 10.1587/elex.14.20170512 | |
学科分类:电子、光学、磁材料 | |
来源: Denshi Jouhou Tsuushin Gakkai | |
【 摘 要 】
This paper proposes an energy-efficient, 12-stage charge pump with constant threshold voltage. This new charge pump utilizes 2 pairs of non-overlapping clocks. Under control of an extra pair of clocks, each charge pump cell (CPC) is equivalent to a switch. Without reduction by a threshold voltage and the limitation of body effects, a higher output voltage than that of the traditional charge pump is obtained by the proposed circuit, which is fabricated in a 0.18 µm complementary metal-oxide semiconductor (CMOS) process. With an input voltage from 0.7 V to 1.4 V, the output voltage range is from 5.8 V to 12.5 V. With a 2-pF load capacitor, the power consumption is only 62.7 µW at maximum DC output voltage of 12.5 V. This circuit is intended to generate an on-chip bias voltage for a microelectromechanical systems (MEMS) microphone.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO201902197837279ZK.pdf | 2335KB | download |