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6CCVD Research

The Method for Improving the High-Speed of Classical and High-Temperature Operational Amplifiers with Current Negative Feedback

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2024-06-03
AuthorsAlexey A. Zhuk, Marsel A. Sergeenko, Elena N. Makarenko, Nikolay N. Prokopenko
InstitutionsDon State Technical University

Abstract

Section titled ā€œAbstractā€

The paper considers a circuit technique to improve the high-speed of classical CBJT operational amplifiers (Op-Amps) with current negative feedback, the input stage of which is realized on the basis of the so-called ā€œdiamondā€ compound transistor and its modifications. It is shown that the reason for the relatively low values of the slew rate (SR) Op-Amps of this class, which are mass-produced by many microelectronic companies on micron technologies, is the presence of parasitic capacitances in the emitter circuits of the input transistors. To increase SR by 1-2 orders of magnitude (from 82 V/Ī¼s to 5000 V/Ī¼s) (when working of input transistors with emitter currents of the order of 100 Ī¼A), the introduction of a differentiating transients correction circuit into the classical Op-Amp circuit is recommended. This provides a significant improvement in SR without increasing the static current-consumption of the Op-Amp input stage. The results of computer simulating of CBJT Op-Amp in LTspice simulation software for micron process technology are presented. The considered circuitry is recommended for application in the structure of high-temperature analogue microcircuits based on wide-bandgap semiconductors (SiC, GaN, GaAs).

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2021 - Novel depletion mode JFET based low static power complementary circuit technology
  2. **** - Stability analysis of current feedback amplifiers. Application Note OA-25
  3. 2006 - Amplifiers with current feedback
  4. 1999 - Folded-cascode amplifier stage
  5. 2002 - Low distortion current-to-current converter
  6. **** - Current vs. Voltage Feedback Amplifiers. National Semiconductor, Application Note AN-015014, OA-30
  7. 1993 - Slew control in current feedback amplifiers
  8. 2002 - Method for bias rail buffering

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