An Energy Efficient V-PP Generator With Fast Ramp-Up Time for Mobile DRAM
- Authors
- Kim, Kyu-Young; Kim, Yonghwan; Lee, Doo-Chan; Kang, Yu-Ri; Kim, Hoonki; Kim, Soo-Won; Park, Jongsun
- Issue Date
- 6월-2011
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- V-PP generator; Charge pump; mobile DRAM; voltage controlled oscillator; voltage doubler
- Citation
- IEEE JOURNAL OF SOLID-STATE CIRCUITS, v.46, no.6, pp.1488 - 1494
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE JOURNAL OF SOLID-STATE CIRCUITS
- Volume
- 46
- Number
- 6
- Start Page
- 1488
- End Page
- 1494
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112287
- DOI
- 10.1109/JSSC.2011.2128170
- ISSN
- 0018-9200
- Abstract
- An energy efficient V-PP generator with fast ramp-up time for mobile DRAM is presented in this paper. Instead of using a fixed pumping clock frequency as in the conventional V-PP generator, the proposed V-PP generator adopts a voltage-controlled oscillator (VCO) and uses variable pumping frequencies to improve the ramp-up time as well as energy efficiency. Numerical results show that the VCO based V-PP generators achieve energy savings of up to 34% with 40% improvement on ramp-up time when compared to the conventional ring oscillator (RO) based design. Our proposed V-PP generator, which uses a three-stage voltage doubler as a charge pump, was implemented and fabricated in CMOS 0.13 mu m process. The V-PP generator chip's core occupies 0.6 mm(2) area and consumes 1162 nJ (average power of 47.8 mW during 24 mu s ramp-up time) while generating 3.0 V output voltage with 1.0 nF load capacitor, 2.0 mA current load and 1.2 V supply voltage.
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Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
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