NDLI: A Low-Cost Low-Power CMOS Time-to-Digital Converter Based on Pulse Stretching

Content Provider	IEEE Xplore Digital Library
Author	Poki Chen Chun-Chi Chen You-Sheng Shen
Copyright Year	1963
Abstract	A low-cost and low-power CMOS time-to-digital converter (TDC) with 50-ps time resolution is proposed in this paper. The reference clock frequency of the TDC is 80 MHz and the input range is theoretically unlimited. Two parallel time interpolators are used to improve the resolution by pulse stretching. In addition to conventional current ratio and capacitor ratio, the duty cycle of the discharging clock is also incorporated to adjust the stretch factor to reduce the power consumption and chip area dramatically. The interpolators are based on analog dual-slope conversion. The time resolution is measured as 50 ps and the integral nonlinearity (INL) error is within plusmn1.1 LSB for input range up to 250ns. The temperature drift of the measured resolution is -15.2% to +13% over a temperature range of -40degC to 80degC, which is significantly smaller than plusmn125% drift over 100degC temperature range in previous work. The voltage drift is 3.8 ps/V or equivalently plusmn3.5% over 3.0-4.0 V supply voltage range. The measured resolution is within 49.8 ps to 52.7 ps for six packaged chips and the chip size is merely 0.5 mmtimes0.45mm as fabricated in the TSMC 0.35-mum CMOS digital process. The power consumption is 0.75mW, enormously reduced from hundreds of milliwatts of the predecessors, at 100 k samples/s and the measurement rate can achieve as high as 150 k samples/s
Sponsorship	IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD
Starting Page	2215
Ending Page	2220
Page Count	6
File Size	462295
File Format	PDF
ISSN	00189499
Volume Number	53
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Semiconductor device measurement Temperature distribution Clocks Energy consumption Voltage Frequency Capacitors Time measurement Size measurement Packaging time-to-digital converter (TDC) Analog interpolator dual-slope conversion pulse stretching
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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