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A Supply-Noise-Insensitive PLL in Monolithic Active Pixel Sensors

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5 Author(s)
Quan Sun ; Institute of Acoustics, Chinese Academy of Sciences, Beijing, China ; Youguang Zhang ; Christine Hu-Guo ; Kimmo Jaaskelainen
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A high-performance CMOS charge pump supply-noise-insensitive phase-locked loop (SNI-PLL) for on-chip clock generation of Monolithic Active Pixel Sensors (MAPS) is presented. The SNI-PLL employs a voltage regulator which provides two stable power supplies to the charge pump and the voltage-controlled oscillator (VCO), respectively. The voltage regulator achieves a Power Supply Noise Rejection (PSNR) of -40 dB over the entire frequency spectrum by using virtual grounded cascode compensation technique. The presented SNI-PLL generates a 160 MHz clock with a Time Interval Error (TIE) of 0.062 UI (Unit Interval) from a 10 MHz reference clock in a noisy power supply environment. The circuit was fabricated with a 0.35 μ m standard CMOS process and occupies 0.38 mm 2 area. The power consumption of the SNI-PLL is about 15.2 mW at 160 MHz.

Published in:

IEEE Sensors Journal  (Volume:11 ,  Issue: 10 )