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Chips, Volume 3, Issue 2 (June 2024) – 2 articles

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31 pages, 1754 KiB  
Review
Slew-Rate Enhancement Techniques for Switched-Capacitors Fast-Settling Amplifiers: A Review
by Michele Dei, Francesco Gagliardi and Paolo Bruschi
Chips 2024, 3(2), 98-128; https://doi.org/10.3390/chips3020005 - 17 Apr 2024
Viewed by 332
Abstract
This review is aimed at the integrated circuit design community and it explores slew-rate enhancement techniques for switched-capacitor amplifiers, with a primary focus on optimizing settling time within power constraints. Key challenges are addressed, including the selection between single-stage and two-stage amplifiers, along [...] Read more.
This review is aimed at the integrated circuit design community and it explores slew-rate enhancement techniques for switched-capacitor amplifiers, with a primary focus on optimizing settling time within power constraints. Key challenges are addressed, including the selection between single-stage and two-stage amplifiers, along with the utilization of advanced circuit-level techniques for slew-rate enhancement. Presently, there exists a gap in comprehensive discussion, with reliance primarily on two Figures of Merit aimed at assessing power efficiency under specific capacitive loads. However, these metrics fail to adequately assess the performance of the existing slew-rate enhancer solutions at different values of capacitive loads. As a consequence, the designer lacks clear guidelines in practical situations. This review provides a state-of-the art mapping under a figure of merit dedicated to assess the whole settling delay, and also introduces a novel performance metric which highlights the role of the circuital architectures, regardless of external operating conditions. By offering a thorough examination, this review seeks to steer future research in switched-capacitor amplifier design, thereby facilitating informed decision-making and fostering innovation in the field. Full article
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29 pages, 27941 KiB  
Article
Using the LabVIEW Simulation Program to Design and Determine the Characteristics of Amplifiers
by Corina Cuntan, Caius Panoiu, Manuela Panoiu, Ioan Baciu and Sergiu Mezinescu
Chips 2024, 3(2), 69-97; https://doi.org/10.3390/chips3020004 - 01 Apr 2024
Viewed by 333
Abstract
Because of the large number of parameters that interact in amplifier functions, determining dynamic regime parameters as well as the mode of function of amplifier stages is an extremely complex problem. This paper describes a LabVIEW application for studying the functioning of an [...] Read more.
Because of the large number of parameters that interact in amplifier functions, determining dynamic regime parameters as well as the mode of function of amplifier stages is an extremely complex problem. This paper describes a LabVIEW application for studying the functioning of an amplifier in various connections. The user selects the generator’s parameters, the type of connection and its parameters, as well as the load circuit characteristics. The application can determine both the stage characteristics and the Bode characteristics. The amplifier’s stability zone, as well as its gain and phase, are determined based on these characteristics. An important advantage of this application is that the design of the amplifier stage can be created starting from some parameters that the amplifier can establish, from which the values of components can be determined. In order to validate the simulation results from the LabVIEW application, the specialized program Multisim was used, as well as experimental measurements using the Electronics Explorer Board. Both Multisim and Electronics Explorer Board can determine Bode characteristics. In both simulations and experimental amplifiers, the same schemes with the same transistor were used. The application can be used for educational purposes as well as to design an amplifier’s stage to achieve specific parameters. Full article
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