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C. C. Enz and G. C. Temes, “Circuit Techniques for Reducing the Effects of Opamp Imperfections: Autozeroing, Correlated Double Sampling, and Chopper Stabilization,” Proceedings of the IEEE-PIEEE, Vol. 84, No. 11, 1996, pp. 1584-1614. doi:10.1109/5.542410

has been cited by the following article:

• TITLE: A Modified Approach for CMOS Auto-Zeroed Offset-Stabilized Opamp

  AUTHORS: Abouzar Taghizadeh, Ziaddin Daie Koozehkanani, Jafar Sobhi

  KEYWORDS: Auto-Zeroing; Chopping; Offset-Stabilization; Opamp

  JOURNAL NAME: Circuits and Systems, Vol.4 No.2, April 17, 2013

  ABSTRACT: In this paper, a very low-offset continuous time amplifier has been presented. It has the fully differential structure and uses an Auto-zeroed offset stabilization technique. This structure consists of two phases in which the offset value is sampled in the first phase and then subtracted from the signal in the second phase. In order to maintain the continuous time topology, the amplifier uses two paths called main-path and sub-path where the main-path is never disconnected from the signal path and as a result the structure will be continuous time. The amplifier is designed to have a total amount of power dissipation about 3 mW in the standard 0.35 μm CMOS process. Furthermore, the proposed Opamp has an offset value lower than 1 μV at a 2.5 kHz Auto-zeroing frequency, unity gain frequency of 6.14 MHz and phase margin of 78.6° with 50 pF loads.