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Charge-neutralized differential amplifiers

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Abstract

A new broadbanding technique for small signal, bipolar differential amplifiers is analytically developed. The new design method significantly improves the circuit gain-bandwidth product of a conventional differential pair without increasing standby power dissipation. “Charge neutralization,” as introduced in this work, is an extension circuit unilateralization theory. It exploits the ability of a mature monolithic fabrication process to control the relative geometries of two otherwise identical active devices. The new design theory has been thoroughly researched for junction isolated and dielectrically isolated silicon bipolar processes. But preliminary work suggests that it offers especially dramatic improvements in frequency response when utilized in conjunction with bipolar SOI technologies.

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Authors and Affiliations

  1. Department of Electrical Engineering-Electrophysics, University of Southern California, 0271, University Park, MC

    W. G. Beall & J. Choma Jr.

  2. 90089-0271, Los Angeles, CA

    W. G. Beall & J. Choma Jr.

Authors
  1. W. G. Beall
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  2. J. Choma Jr.
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Beall, W.G., Choma, J. Charge-neutralized differential amplifiers. Analog Integr Circ Sig Process 1, 33–44 (1991). https://doi.org/10.1007/BF02151024

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  • DOI: https://doi.org/10.1007/BF02151024

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