Open AccessVCO‐based sturdy MASH ADC architecture
Author(s) -
Gutierrez E.,
Hernandez L.,
Cardes F.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.3345
Subject(s) - voltage controlled oscillator , electronic engineering , noise shaping , converters , successive approximation adc , interconnection , architecture , computer science , noise (video) , engineering , sensitivity (control systems) , voltage , electrical engineering , capacitor , telecommunications , artificial intelligence , art , image (mathematics) , visual arts
A new multistage 1‐1 ΔΣ 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.