Optimisation of direct auto-zeroing offset cancellation in low voltage applications using dual level CMFB

abstract

• A modified CMFB circuit is presented that reinstates the use of direct opamp auto-zeroing offset cancellation techniques in low voltage applications. This approach is particularly useful for high precision sample and hold amplifiers and Nyquist rate ADCs, where the opamp is reset during one of the clock phases. Differential offsets up to 50mV are effectively reduced as demonstrated by a sample and hold example. 2009 The Institution of Engineering and Technology.

authors

• Silva-Martinez, Jose

published proceedings

• Electronics Letters

author list (cited authors)

• Assaad, R., & Silva-Martinez, J.

citation count

• 1

complete list of authors

• Assaad, R||Silva-Martinez, J

publication date

• August 2009

publisher

• Institution of Engineering and Technology (IET)  Publisher

published in

• Electronics Letters  Journal

keywords

• 40 Engineering
• 4006 Communications Engineering
• 4009 Electronics, Sensors And Digital Hardware

Digital Object Identifier (DOI)

• 10.1049/el.2009.0500

start page

• 809

end page

• 809

volume

• 45

issue

• 16

URL

• http://dx.doi.org/10.1049/el.2009.0500