Title :
A comparative study of two SC-CMFB networks used in fully differential OTA
Author :
Recoules, H. ; Bouchakour, R. ; Loumeau, P.
Author_Institution :
Ecole Nat. Superieure des Telecommun., Paris, France
Abstract :
A fully differential folded cascode OTA, integrated in an analog Bicmos 0.5 μm process, is presented with the use of two switch capacitor common mode feedbacks. Their study is presented in details and the performances are compared to put forward their drawbacks and advantages. Experimental results gives more than 70 dB of DC gain for the OTA, a gain-bandwidth around 50 MHz and a phase margin greater than 80 degrees
Keywords :
BiCMOS analogue integrated circuits; cascade networks; circuit feedback; differential amplifiers; operational amplifiers; switched capacitor networks; 0.5 micron; 70 dB; BiCMOS analog circuit; DC gain; SC-CMFB network; fully differential folded cascode OTA; gain-bandwidth; phase margin; switch capacitor common mode feedback; BiCMOS integrated circuits; Feedback loop; High power amplifiers; Intelligent networks; Signal to noise ratio; Strontium; Switched capacitor networks; Switches; Transconductance; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.814883
