Topic
Electronic filter
About: Electronic filter is a research topic. Over the lifetime, 13207 publications have been published within this topic receiving 93063 citations. The topic is also known as: filter.
Papers published on a yearly basis
Papers
More filters
12 Jun 1997
23 citations
Proceedings Article•
01 Jan 1998TL;DR: In this article, a combined reactive power compensation method of a static Var compensator (SVC) and an active filter is described for unbalanced three-phase distribution feeders with harmonic distortion.
Abstract: A combined reactive power compensation method of a static Var compensator (SVC) and an active filter is described in this paper for unbalanced three-phase distribution feeders with harmonic distortion. The SVC acts as a classic reactive power compensator for load balancing and power factor correction. The small rating active filter is used to improve filtering characteristics of the passive filter in SVC and suppress possible resonance between the system impedance and the passive filter. The control signals are derived from the calculation of instantaneous active and reactive powers of the distribution feeder. Simulation results carried out by the electromagnetic transients program (EMTP) show that the proposed reactive power compensation configurations can effectively balance currents, correct power factor. and eliminate harmonic currents.
23 citations
Patent•
03 Sep 2014
TL;DR: In this article, a switching power supply for an AC/DC-DC self-adaptive instrument within an ultra-wide voltage input range is presented, consisting of an input protective circuit, an EMI filter circuit, a power frequency rectification and filter circuit and an optocoupler isolation feedback circuit.
Abstract: The invention discloses a switching power supply for an AC/DC-DC self-adaptive instrument within an ultra-wide voltage input range. The switching power supply comprises an input protective circuit, an EMI filter circuit, a power frequency rectification and filter circuit, a high frequency rectification and filter circuit, a boosting conversion circuit, a flyback conversion circuit, a first voltage sampling circuit, a first current sampling circuit, a second voltage sampling circuit, a second current sampling circuit, a first PWM circuit, a second PWM circuit, an auxiliary power supply circuit, a power switching circuit, a voltage detection and comparison control circuit and an optocoupler isolation feedback circuit. A two-stage type cascade circuit is formed by the boosting conversion circuit and the flyback conversion circuit, and the automatic instrument can automatically adapt to power supply of an 85-265V alternating-current power supply and an 18-100V direct-current power supply.
23 citations
Patent•
25 Feb 1999
TL;DR: In this paper, a modular thin film, distributed, lumped element band-pass filter is presented, where component defining depositions are arranged to overlap and couple to one another with connecting vias.
Abstract: A modular thin film, distributed, lumped element band-pass filter. The filter circuitry is configured on a number of ceramic substrates. The component defining depositions are arranged to overlap and couple to one another with connecting vias. Alternative 800 MHz and 1.9 GHz band-pass filter circuits are disclosed. Bordering ground conductors and covering ground planes shield lumped impedance resonator and overlapping capacitor elements. The layers are configured to accommodate a range of frequencies and permit pre-fabrication with subsequent laser trimming, assembly and packaging.
23 citations
Book•
26 Mar 1987
TL;DR: In this article, the authors present a survey of the history of crystal filters and their applications in various applications, including Transformers and Coils, as well as the specification and testing of assembled crystal filters.
Abstract: Quartz-Crystal Resonators. Transformers and Coils. Filter Circuit Theory. Discrete Crystal Filters. Mechanical Design and Manufacture of Discrete Crystal Filters. Monolithic Crystal Filters. Cascaded Monolithic Crystal Filters. Applications of Crystal Filters. Specification and Testing of Assembled Crystal Filters. Using Crystal Filters. Appendix. Index.
23 citations