Title :
A time-based analog-to-digital converter using a multi-phase voltage controlled oscillator
Author :
Kim, Jaewook ; Cho, SeongHwan
Author_Institution :
Korea Adv. Inst. of Sci. & Technol., Daejon
Abstract :
A time-based analog-to-digital converter(ADC) employing a multi-phase voltage-controlled oscillator(VCO) is presented. The VCO is based on a ring oscillator which converts analog input voltage to phase information. Digital output is produced by a phase quantizer which consists of a counter for coarse quantization and phase detector for fine quantization. Using this technique, an 8-bit 100Msamples/s ADC is designed and simulated. Impact of jitter and VCO linearity on the ADC performance is analyzed and verified
Keywords :
phase coding; quantisation (signal); voltage-controlled oscillators; analog-to-digital converter; coarse quantization; fine quantization; multiphase VCO; phase quantizer; ring oscillator; time-based ADC; voltage controlled oscillator; Analog-digital conversion; Counting circuits; Detectors; Jitter; Linearity; Performance analysis; Phase detection; Quantization; Ring oscillators; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693489
