Version 1
: Received: 21 April 2022 / Approved: 26 April 2022 / Online: 26 April 2022 (10:33:53 CEST)
How to cite:
Chumakov, V.; Serebryakov, A.; Titov, A.; Prokopenko, N. The Concept of Designing BiJT Operational Amplifiers for Anti-aliasing Active LPF with a Low Level of Systematic Component of the Zero Offset Voltage. Preprints2022, 2022040235. https://doi.org/10.20944/preprints202204.0235.v1
Chumakov, V.; Serebryakov, A.; Titov, A.; Prokopenko, N. The Concept of Designing BiJT Operational Amplifiers for Anti-aliasing Active LPF with a Low Level of Systematic Component of the Zero Offset Voltage. Preprints 2022, 2022040235. https://doi.org/10.20944/preprints202204.0235.v1
Chumakov, V.; Serebryakov, A.; Titov, A.; Prokopenko, N. The Concept of Designing BiJT Operational Amplifiers for Anti-aliasing Active LPF with a Low Level of Systematic Component of the Zero Offset Voltage. Preprints2022, 2022040235. https://doi.org/10.20944/preprints202204.0235.v1
APA Style
Chumakov, V., Serebryakov, A., Titov, A., & Prokopenko, N. (2022). The Concept of Designing BiJT Operational Amplifiers for Anti-aliasing Active LPF with a Low Level of Systematic Component of the Zero Offset Voltage. Preprints. https://doi.org/10.20944/preprints202204.0235.v1
Chicago/Turabian Style
Chumakov, V., Alexey Titov and Nikolai Prokopenko. 2022 "The Concept of Designing BiJT Operational Amplifiers for Anti-aliasing Active LPF with a Low Level of Systematic Component of the Zero Offset Voltage" Preprints. https://doi.org/10.20944/preprints202204.0235.v1
Abstract
The zero offset voltage in anti-aliasing low-pass filters (LPF) included at the ADC input has a significant effect on the effective bit rate of the ADC. The article discusses methods for minimizing the systematic component of the zero offset voltage (VOS) of operational amplifiers (Op-Amp) in the structure of the LPF, due to the degradation of the current gain of the base (b) of bipolar transistors for an extremely common subclass of Op-Amp with one high-impedance node. The methods of matching a high-impedance Op-Amp node and a buffer amplifier with the help of special correcting SCMp and SCMn multipolars are proposed. Methods of description and formation of the given coefficients of weak current asymmetry of typical Op-Amp functional units (current mirrors, input DS, buffer amplifiers, SRC, etc.) are presented. As an example, the results of computer simulation of GaAs Op-Amp with small VOS performed on JFET field and p-n-p bipolar transistors are given.
Keywords
operational amplifier; compensation of the systematic component of the zero offset voltage; differential stage; buffer amplifier; current mirror; reference current source; BJT transistors; GaAs transistors.
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
