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Título : In-pixel Voltage-Controlled Ring-Oscillator for Phase Interpolation in ToF Image Sensors
Autor : Vornicu, I.; Carmona-Galán, R. ; Rodríguez-Vázquez, Ángel
Fecha de publicación : 2016
Editor: Institute of Electrical and Electronics Engineers
Citación : IEEE International Symposium on Circuits and Systems (ISCAS) 2016
Resumen: The design and measurements of a CMOS pseudodifferential voltage-controlled ring-oscillator (VCRO) are presented. It is aimed to act as time interpolator for arrayable picosecond time-to-digital convertors (TDC). This design is incorporated into a 64×64 array of TDCs for time-of-flight (ToF) measurement. It has been fabricated in a 0.18μ™ standard CMOS technology. Small occupation area of 28×29μm2 and low average power consumption of 1.17mW at 850MHz are promising figures for this application field. Embedded phase alignment and instantaneous start-up time are required to minimize the offset of time interval measurements. The measured gain of the VCRO is of 477MHz/V with a frequency tuning range of 53%. Moreover it features a linearity of 99.4% over a wide range of control frequencies, namely from 400MHz to 850MHz. The phase noise is of 102dBc/Hz at 2MHz offset frequency from 850MHz
Versión del editor: http://dx.doi.org/10.1109/ISCAS.2016.7538945
URI : http://hdl.handle.net/10261/136493
DOI: 10.1109/ISCAS.2016.7538945
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