Two CMOS current output stages are presented. Compared to the traditional solution, which exhibits unbalanced operation, the proposed ones exploit an auxiliary high-gain feedback loop which provides differential drive, thereby highly improving the common-mode rejection ratio (CMRR). Prototypes are designed and fabricated in a 0.35- m technology and experimental results confirm that a CMRR increase greater than 20 dB can be achieved and, for one of the two solutions, without increasing the voltage requirements.
CMOS high-CMRR current output stages / Centurelli, Francesco; Alfio Dario, Grasso; Salvatore, Pennisi; Scotti, Giuseppe; Trifiletti, Alessandro. - In: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS. II, EXPRESS BRIEFS. - ISSN 1549-7747. - STAMPA. - 54:9(2007), pp. 745-749. [10.1109/tcsii.2007.900351]
CMOS high-CMRR current output stages
CENTURELLI, Francesco;SCOTTI, Giuseppe;TRIFILETTI, Alessandro
2007
Abstract
Two CMOS current output stages are presented. Compared to the traditional solution, which exhibits unbalanced operation, the proposed ones exploit an auxiliary high-gain feedback loop which provides differential drive, thereby highly improving the common-mode rejection ratio (CMRR). Prototypes are designed and fabricated in a 0.35- m technology and experimental results confirm that a CMRR increase greater than 20 dB can be achieved and, for one of the two solutions, without increasing the voltage requirements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
