A re-configurable MASH 2-2 bandpass DQEFM for multi-standard applications

Sebastian, Rijo; Prakash, A. V. Jos; Jose, Babita R.; Tk, Shahana; Mathew, Jimson

doi:10.1080/00207217.2019.1600737

Cited by 1 publication

(1 citation statement)

References 16 publications

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“…Contrary to the BPF, other authors focused on bandstop filters to design controllers for space shuttle vehicles, and the filter structure can be designed using low-pass and high-pass filters, as shown in the work by the authors of [3]. Reconfigurability is another issue that has been introduced very recently in the work by the authors of [4], accompanied by a reduction in power and sensitivity to circuit nonidealities for a bandpass modulator applied in a digital intermediate frequency receiver system.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Q-Factor in a Biquadratic Bandpass Filter Implemented with Opamps

et al. 2019

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Active filter design is a mature topic that provides good solutions that can be implemented using discrete devices or integrated circuit technology. For instance, when the filter topologies are implemented using commercially available operational amplifiers (opamps), one can explore varying circuit parameters to tune the central frequency or enhance the quality (Q) factor. We show the addition of a feedback loop in the signal flow graph of a biquadratic filter topology, which enhances Q and highlights that a sensitivity analysis can be performed to identify which circuit elements influence central frequency, Q, or both. In this manner, we show the opamp-based implementation of a biquadratic bandpass filter, in which Q is enhanced through performing a sensitivity analysis for each circuit element. Equations for the central frequency and Q are provided to observe that there is not a direct parameter that enhances them, but we show that from sensitivity analysis one can identify the circuit elements that better enhance Q-factor.

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Section: Introductionmentioning

confidence: 99%