Title :
Residual offset optimization for a continuous time autozero amplifier
Author :
Danchiv, Andrei ; Bodea, Mircea
Author_Institution :
Infineon Technol. Romania, Bucharest
Abstract :
In this paper, a continuous time autozero (AZ) amplifier topology is presented. To improve offset cancellation, a fully differential internal AZ loop is used. An analytical model is developed for estimating the residual offset during both operation phases; taking into account the main offset contributions: base and cancellation amplifiers offset voltages and respectively charge injection. The design considerations for achieving optimal residual offset are presented.
Keywords :
differential amplifiers; cancellation amplifiers offset voltage; charge injection; continuous time autozero amplifier topology; differential internal AZ loop; offset cancellation; residual offset optimization; Analytical models; Circuit topology; Feedback loop; Operational amplifiers; Phase estimation; Signal processing; Signal sampling; Switches; Virtual colonoscopy; Voltage;
Conference_Titel :
Signals and Electronic Systems, 2008. ICSES '08. International Conference on
Conference_Location :
Krakow
Print_ISBN :
978-83-88309-47-2
Electronic_ISBN :
978-83-88309-52-6
DOI :
10.1109/ICSES.2008.4673415
