Title :
Time-referenced single-path multi-bit ΔΣ ADC using a VCO based quantizer
Author :
Naiknaware, Ravindranath ; Fiez, Terri
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA
Abstract :
In this paper, we present a novel single-path multi-bit delta-sigma analog-to-digital converter (ΔΣ ADC) architecture that uses time as a reference for performing multi-bit digital-to analog conversion in the feedback path. The architecture uses a voltage-controlled oscillator (VCO) as a multi-bit quantizer. In the feedback path of the ΔΣ ADC, the errors due to component mismatch are avoided by using a single-path for all the levels in a multi bit digital to-analog converter (DAC). The technique eliminates the need for feedback DAC architectures with static and dynamic component matching
Keywords :
analogue-digital conversion; circuit feedback; delta-sigma modulation; quantisation (signal); voltage-controlled oscillators; VCO based quantizer; analog-to-digital converter; delta-sigma ADC; feedback path; multi-bit quantizer; multibit digital-to analog conversion; single-path multi-bit ΔΣ ADC; time-referenced ΔΣ ADC; voltage-controlled oscillator; Clocks; Counting circuits; Delay; Detectors; Frequency; Low pass filters; Output feedback; Sampling methods; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780612
