A Low Power RC Time Constant Auto-tuning circuit for RC-integrators in High Linearity Continuous-Time Delta Sigma modulators - Télécom Paris Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

A Low Power RC Time Constant Auto-tuning circuit for RC-integrators in High Linearity Continuous-Time Delta Sigma modulators

Résumé

This paper presents the design of a low power RC time constant tuning circuit for high linearity 5th order continuous time Delta Sigma modulator used in LTE-A application with 40MHz bandwidth. This auto-tuning system contains an analog integrator, a voltage comparator, and a digital tuning engine performed by a clock generator, a register and a counter which generate a control word that sets a programmable capacitors bank to obtain an RC time constant accuracy better than ±2%. It resolves process variations issues which could result in up to ±30% of RC time constant uncertainty and degrade the Delta Sigma modulators SNDR. The system has been designed in a 65nm CMOS technology with 1.2 V supply voltage and power consumption is less than 200μW.

Domaines

Electronique
Fichier non déposé

Dates et versions

hal-02411885 , version 1 (15-12-2019)

Identifiants

  • HAL Id : hal-02411885 , version 1

Citer

C. Ouffoue, V. T. Nguyen, Chadi Jabbour, Hussein Fakhoury, Patrick Loumeau. A Low Power RC Time Constant Auto-tuning circuit for RC-integrators in High Linearity Continuous-Time Delta Sigma modulators. IEEE International NEWCAS Conference, Jun 2012, Montreal, Canada. pp.281-284. ⟨hal-02411885⟩
34 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More