A Design of Fast-Settling, Low-Power 4.19-MHz Real-Time Clock Generator With Temperature Compensation and 15-dB Noise Reduction
- Authors
- Lee, DS[Lee, Dong-Soo]; Kim, SJ[Kim, Sung-Jin]; Kim, D[Kim, Donggyu]; Pu, Y[Pu, Younggun]; Yoo, SS[Yoo, Sang-Sun]; Lee, M[Lee, Minjae]; Hwang, KC[Hwang, Keum Cheol]; Yang, Y[Yang, Youngoo]; Lee, KY[Lee, Kang-Yoon]
- Issue Date
- Jun-2018
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Electromagnetic interference (EMI); fast-settling pierce oscillator; low power; real-time clock (RTC); temperature compensation
- Citation
- IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, v.26, no.6, pp.1151 - 1158
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
- Volume
- 26
- Number
- 6
- Start Page
- 1151
- End Page
- 1158
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/19770
- DOI
- 10.1109/TVLSI.2018.2806935
- ISSN
- 1063-8210
- Abstract
- This paper presents a fast-settling, low-power, low-noise real-time clock (RTC) generator for a 4.194304-MHz crystal oscillator. The fast settling reduces the startup time of the proposed RTC generator using a negative transcondutance booster and a crystal energy booster. The low power is only operated to reduce the total power consumption in the standby mode with the use of a peak-and-low detector. To achieve the electromagnetic interference (EMI) reduction, a pseudorandom number generator is used. The temperature compensation reduces the frequency offset from 16 to 1 ppm depending on the temperature variation. The proposed RTC generator is fabricated using a 0.18-mu m CMOS and the core area is 0.4 mmx 0.7 mm. The power consumption is 54 mu Wfrom a 1.8-V supply voltage. The measured startup time can be reduced by 90% from 4 ms to 400 mu s with the proposed 4.194304-MHz XTAL driver. The current consumption in the standbymode is reduced by up to 700 nA. The measured frequency variation is up to a 1-ppm operation under a temperature change from -40 degrees C to 60 degrees C. The measured output peak power is reduced by up to 15 dB in the EMI reduction mode.
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Collections - Information and Communication Engineering > School of Electronic and Electrical Engineering > 1. Journal Articles
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