Title :
CMOS continuous-time CMFB circuit with improved linearity
Author :
Carrillo, Juan M. ; Ausín, José L. ; Duque-Carrillo, J. Francisco
Author_Institution :
Dept. of Electron. Eng., Univ. of Extremadura, Badajoz
Abstract :
A continuous-time common-mode feedback (CMFB) network consisting of two unity-gain buffers and two passive resistors is introduced in this paper. According to the comparison with a previous implementation, the common-mode control structure presented shows an improved linearity performance as well as a higher immunity to device mismatches. The CMFB circuit has been included in the design of a fully differential voltage buffer, based on a fully differential difference amplifier. Simulated results, obtained in a 0.35-mum standard CMOS technology, are provided in order to show the performance of the proposed approach.
Keywords :
CMOS integrated circuits; buffer circuits; circuit feedback; differential amplifiers; passive networks; CMOS continuous-time CMFB circuit; common-mode control structure; continuous-time common-mode feedback network; difference amplifier; passive resistors; standard CMOS technology; unity-gain buffers; voltage buffer; Bandwidth; CMOS technology; Circuit simulation; Delta modulation; Detectors; Differential amplifiers; Feedback circuits; Linearity; Resistors; Voltage;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
Electronic_ISBN :
978-1-4244-1342-3
DOI :
10.1109/ECCTD.2007.4529531
