Fully-VCO-based 0-2 MASH CT Delta Sigma ADC
| Autor: | Xing, Xinpeng, Zhu, Peng, Liu, Hui, Gielen, Georges |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Technology
CMOS process figure-of-merit size 40 VCO-based quantiser quantisation (signal) charge pump 0 nm Engineering phase detectors spurious-free dynamic range intrinsic noise shaping high-order structure second-order noise shaping Science & Technology analogue-digital conversion fully-VCO-based 0-2 MASH CT sigma ADC fully-voltage-controlled oscillator-based continuous-time delta-sigma analogue-to-digital converter voltage-controlled oscillators delta-sigma modulation charge pump circuits Engineering Electrical & Electronic multistage shaping demonstration CMOS digital integrated circuits analogue integrators highly-digital power-efficient VCO-based integrator phase detector traditional power-hungry front-end analogue integrator VCO |
| Popis: | © The Institution of Engineering and Technology 2018. A fully-voltage-controlled oscillator (VCO)-based continuous-time (CT) Delta-Sigma (ΔΣ) analogue-to-digital converter (ADC) is reported, implementing second-order noise shaping without any analogue integrators. Traditional power-hungry front-end analogue integrator is replaced by a highly-digital power-efficient VCO-based integrator, which is constructed by a VCO, a phase detector and a charge pump. The quantisation is executed by a VCO-based quantiser with intrinsic noise shaping. Taking advantage of the mostly-digital and high-order structure, a spurious-free dynamic range of 74 dB and a figure-of-merit of 52 fJ/step over a 40 MHz bandwidth are achieved by a 0-2 multi-stage shaping (MASH) demonstration in 40 nm CMOS. ispartof: ELECTRONICS LETTERS vol:54 issue:17 pages:1018-1019 status: published |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|