The performance of the current feedback op-amps (CFOAs) is very much determined by the input stage of CFOAs, including common-mode rejection ratio (CMRR). Two new CFOAs topologies are presented in this article: one topology uses a cascoding technique, and the second one uses a bootstrapping technique, both of which provide a much better CMRR and lower DC offset voltage than the conventional CFOAs. Moreover, the new CFOAs design exhibits an extended high frequency bandwidth, with a gain accuracy improvement. Applications requiring constant bandwidth with variable (closed loop) gain will benefit from the proposed topologies.
Tammam, AHayatleh, KBarker, SBen-Esmael, MTerzopoulos, N
Faculty of Technology, Design and Environment\Department of Mechanical Engineering and Mathematical Sciences
Year of publication: 2015Date of RADAR deposit: 2016-07-26
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