Nonlinear effects in pseudo differential OTAs with CMFB

abstract

• A general description of nonlinearities in pseudo differential operational transconductance amplifiers (OTA) with common-mode feedback (CMFB) is introduced. The effects of CMFB nonlinearities on the differential signals are evaluated and design tradeoffs including nonidealities are determined. A practical pseudo differential fully balanced fully symmetric OTA architecture with common-mode feedforward (CMFF) is used as a case study to probe the theory. The OTA has an inherent common-mode detector; hence, the CMFB circuit is efficiently implemented. The OTA is used to implement a 100-MHz fourth-order linear-phase OTA-C filter.

authors

• Silva-Martinez, Jose

published proceedings

• IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING

altmetric score

• 3

author list (cited authors)

• Mohieldin, A. N., Sanchez-Sinencio, E., & Silva-Martinez, J.

citation count

• 44

complete list of authors

• Mohieldin, AN||Sanchez-Sinencio, E||Silva-Martinez, J

publication date

• October 2003

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

keywords

• Common-mode Feed-forward (cmff)
• Common-mode Feedback (cmfb)
• High Frequency
• Nonlinearity
• Operational Transconductance Amplifiers (ota)
• Ota-c Filters
• Pseudo Differential

Digital Object Identifier (DOI)

• 10.1109/TCSII.2003.818395

start page

• 762

end page

• 770

volume

• 50

issue

• 10

URL

• http%3A%2F%2Fdx.doi.org%2F10.1109%2Ftcsii.2003.818395