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Author Hye-Jung Kwon ♦ Jae-Seung Lee ♦ Byungsub Kim ♦ Jae-Yoon Sim ♦ Hong-June Park
Sponsorship IEEE Circuits and Systems Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2004
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics
Subject Keyword Noise ♦ Tin ♦ Distortion measurement ♦ Transient analysis ♦ Time measurement ♦ Transistors ♦ Mathematical model ♦ wide input range ♦ Gain control ♦ high resolution Time to Digital Converter (TDC) ♦ open loop ♦ slew rate control ♦ time amplifier
Abstract Analysis of an open-loop time amplifier shows good agreement between measurements and calculations on the time gain, distortion of time gain, and rms noise and offset of output time difference. The time amplifier is based on the slew rate control method. It achieves a large time gain up to 120 and a wide range of input time difference up to 2 ns. The circuit consists of two precharged capacitors and current sources, where one capacitor is discharged at a fast slew rate during the time interval of the input time difference and then both capacitors are discharged at the same slow slew rate. The time gain is simply determined by the ratio of two bias current values. The proposed time amplifier is followed by an 8-bit TDC to obtain the digital output code. The time gain distortion caused by channel length modulation is less than 1.6% for the input time difference larger than 100 ps. The time offset and the rms noise of output time difference are inversely proportional to the smaller bias current. The rms noise is dominated by the noise of the comparator reference voltage. The time amplifier and TDC consume 0.36 mW and 1 mW, respectively, at 1.2 V supply in a 0.13 μm CMOS process.
Description Author affiliation :: Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., Pohang, South Korea
Author affiliation :: SK Hynix Semicond., Icheon, South Korea
ISSN 15497747
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-01-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 61
Issue Number 7
Size (in Bytes) 1.03 MB
Page Count 5
Starting Page 481
Ending Page 485

Source: IEEE Xplore Digital Library