VCO-based sturdy MASH ADC architecture Articles uri icon

publication date

  • January 2017

start page

  • 14

end page

  • 15

issue

  • 1

volume

  • 53

international standard serial number (ISSN)

  • 0013-5194

electronic international standard serial number (EISSN)

  • 1350-911X

abstract

  • A new multistage 1-1 sigma analogue-to-digital converter (ADC) architecture implemented only with voltage-controlled oscillators (VCOs) is introduced. A sturdy multistage noise-shaping (SMASH) configuration is used to avoid the need of either calibration circuitry or noise-cancellation filters. The digital nature of the VCO's output simplifies the implementation of the interconnection paths between stages, making unnecessary neither the use of multibit digital-to-analogue converters nor analogue subtraction elements. The basic operation of the architecture is shown at system level and the sensitivity to VCO's frequency mismatch is analysed. The proposed architecture has been validated through behavioural simulations.

keywords

  • analogue-digital conversion; voltage-controlled oscillators; delta-sigma modulation; vco; sturdy mash adc architecture; multistage 1-1 sigma analogue-to-digital converter architecture; voltage-controlled oscillator; sturdy multistage noise-shaping configuration; smash configuration; calibration circuitry; noise-cancellation filter; multibit digital-to-analogue converter; analogue subtraction element; delta; oscillator; quantizer