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- W4315778463 abstract "Waveform digitization is an important research direction in high-energy physics experiments. Compared to analog-to-digital converter (ADC) solutions, switched capacitor arrays (SCAs) have the advantages of high sampling rate, low power consumption, and easy multichannel integration. However, the dead time of SCA is a limitation for high-hit-rate applications. To reduce the quantization time contributed by the on-chip Wilkinson ADC, a strategy of a high-speed less-bit coarse counter combined with multiphase clock locking can be adopted. In this case, a high-precision PLL with multiple phases is needed. This article presents the design and test of a 4-phase PLL for a 12-bit single-slope ramp ADC employed in our SCA ASIC in research. It contains a linear phase and frequency detector (PFD), a current steering charge pump (CP), a second-order loop filter, a wideband voltage-controlled oscillator (VCO), VCO calibration, a band-locked detector, and a frequency divider (FD). The frequency tuning range is achieved from 1 to 2 GHz. In addition, another output clock, supporting division by 1, 2, 4, or 8, can be used as a serial readout clock. The PLL has been designed and fabricated in 0.13- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$mu text{m}$ </tex-math></inline-formula> CMOS technology. The 1024-cycle jitter is approximately 0.013 periods. The area of the PLL core is 0.077 mm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> . The power consumption of the PLL core is 14.5 mW." @default.
- W4315778463 created "2023-01-13" @default.
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- W4315778463 date "2023-06-01" @default.
- W4315778463 modified "2023-10-03" @default.
- W4315778463 title "A Wideband 4-Phase Phase-Locked Loop for Single-Slope Ramp ADC in SCA ASIC" @default.
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- W4315778463 doi "https://doi.org/10.1109/tns.2023.3236338" @default.
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