A Family of Low-Voltage Bulk-Driven CMOS Continuous-Time CMFB Circuits

This brief introduces four different structures for implementing a continuous-time common-mode feedback (CMFB) network for fully differential (FD) amplifiers. The proposed circuits use bulk-driven MOS transistors, thus representing a low-voltage realization of their gate-driven counterparts. The CMF...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2010-11, Vol.57 (11), p.863-867
Main Authors: Carrillo, Juan M, Torelli, Guido, Dominguez, Miguel A, Perez-Aloe, Raquel, Valverde, José M, Duque-Carrillo, J Francisco
Format: Article
Language:English
Subjects:
Buffers
Bulk-driven MOS transistors
Circuits
CMOS
CMOS analog integrated circuits
CMOS integrated circuits
common-mode feedback (CMFB)
Delta modulation
Detectors
Electric potential
fully differential amplifiers
Linearity
Logic gates
low-voltage
Metal oxide semiconductors
MOSFETs
Networks
Voltage
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Summary:This brief introduces four different structures for implementing a continuous-time common-mode feedback (CMFB) network for fully differential (FD) amplifiers. The proposed circuits use bulk-driven MOS transistors, thus representing a low-voltage realization of their gate-driven counterparts. The CMFB circuits were included in a 1.5-V FD buffer implemented in standard 0.35-μm CMOS technology. Experimental results illustrate the performance of the proposed schemes, demonstrating their suitability to operate with a low supply voltage.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2010.2068090