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. Author manuscript; available in PMC: 2021 Mar 18.
Published in final edited form as: IEEE Solid State Circuits Lett. 2019 May 14;2(3):17–20. doi: 10.1109/lssc.2019.2916754

Fig. 1.

Fig. 1

Boosting the input impedance of chopping amplifiers: (a) Prior art: positive feedback added to a capacitive feedback chopping amplifier, (b) Prior art: feed-forward axillary path added to the input of a capacitive feedback chopping amplifier, (c) Proposed scheme: feed-forward axillary path added to the input of a current feedback chopping amplifier.