Capacitively Coupled Chopper Amplifiers
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As discussed in Chap. 1, capacitively coupled chopper amplifiers can potentially handle input common-mode voltages far beyond their own supplies. Furthermore, their inherent use of chopping means that they can also achieve microvolt offset and low 1/f noise.
KeywordsInput Impedance Parasitic Capacitance Differential Pair Weak Inversion Output Spike
- 1.LTC1043, Linear Technology, http://www.linear.com/product/LTC1043, Jan., 1984.
- 2.C. C. Enz and G. C. Temes, “Circuit techniques for reducing the effects of op-amp imperfections: autozeroing, correlated double sampling, and chopper stabilization,” Proceedings of IEEE, vol. 84, no. 11, pp. 1584-1614, Nov. 1996.Google Scholar
- 3.M. Snoeij, M. Ivanov, “A 36 V JFET-input bipolar operational amplifier with 1 μV/°C maximum offset drift and –126 dB total harmonic distortion,” ISSCC, pp. 248–249, Feb. 2011.Google Scholar
- 6.T. Denison, K. Consoer,W. Santa, et al.,“A 2 µW 100nV/√Hz Chopper Stabilized Instrumentation Amplifier for Chronic Measurement of Neural Field Potentials,” IEEE JSSC, vol. 42, no. 12, pp. 2934–2945, Dec., 2007.Google Scholar
- 10.Q. Fan, J. H. Huijsing, and K. A. A. Makinwa, “A 21 nV/√Hz Chopper-stabilized Multipath Current-feedback Instrumentation Amplifier with 2 µV offset,” IEEE ISSCC. Dig. Tech. Papers, pp. 80–81, Feb. 2010.Google Scholar
- 11.M. Pertijs, W.J. Kindt, “A 140 dB-CMRR Current-Feedback Instrumentation Amplifier Employing Ping-Pong Auto-Zeroing and Chopping,” IEEE ISSCC Dig. Tech. Papers, pp. 324-325, Feb., 2009.Google Scholar