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
Patent•
27 Mar 1992
TL;DR: In this article, a programmable transverse filter required for the matched filtering of signals with a very wide passband was proposed, where signals to be filtered modulate one or more optical carriers (F1) in a modulator.
Abstract: The invention relates to a programmable transverse filter required for the matched filtering of signals with very wide passband. The signals to be filtered modulate one or more optical carriers (F1) in a modulator (MOD). Each carrier is distributed over several channels by a distributor (DIV). A delay creation circuit (CR1 to CRn) is provided in each channel. These channels are next summed after having been correctly delayed and assigned a coefficient characteristic of the signal to be detected.
59 citations
TL;DR: In this article, a voltage-mode universal biquad with single input and multiple outputs has been reported to simultaneously achieve all of the advantageous features: (i) employment of only two differential difference current conveyor (DDCC), (ii) employed two grounded capacitors, (iii) employed only three resistors, and (iv) simultaneously realize voltage mode low pass, band-pass, high pass, notch and all pass filter signals from the five output terminals, respectively, orthogonal control of? o and Q, low input impedance and can be cascadable
Abstract: Despite the extensive literature on current conveyor-based voltage-mode universal biquads with single input and multiple outputs, no filter circuit has been reported to simultaneously achieve all of the advantageous features: (i) employment of only two differential difference current conveyor (DDCC), (ii) employment only two grounded capacitors, (iii) employment only three resistors, (iv) simultaneously realize voltage-mode low-pass, band-pass, high-pass, notch and all-pass filter signals from the five output terminals, respectively, (v) orthogonal control of ? o and Q, (vi) low input impedance and can be cascadable (vii) no need to employ inverting type input signals, and (viii) no need to impose component choice except realizing the all-pass filter signal.
59 citations
01 Feb 2000
TL;DR: In this article, the design of active LC filters on silicon is discussed, and topics such as negative resistors, Q enhancement, dynamic range, filter synthesis, and automatic tuning are discussed.
Abstract: The paper deals with research toward the design of active LC filters on silicon. Subjects such as negative resistors, Q enhancement, dynamic range, filter synthesis, and automatic tuning are discussed.
59 citations
TL;DR: In this article, a harmonic-suppressed tunable bandpass filter with two movable transmission zeros is proposed to realize harmonic suppression without degrading passband performance, which can not only decrease the resonator Q and dissipate RF power, but also control even-order impedance and cause mismatching at filter input/output ports.
Abstract: This paper presents harmonic-suppressed tunable bandpass filters with two movable transmission zeros. For tunable bandpass filters, tuning the passband frequency will cause the harmonic to shift, complicating the harmonic suppression. To overcome this problem, lumped elements are utilized to realize harmonic suppression without degrading passband performance. It is found from theoretical analysis that at even-order harmonic frequencies, the lumped elements could not only decrease the resonator Q and dissipate RF power, but also control even-order impedance and cause mismatching at filter input/output ports. Both of the factors help reject even-order harmonics. Meanwhile, the features at fundamental resonant frequencies are nearly not affected by these elements, indicating harmonic suppression could be achieved without affecting passband performance. This property is experimentally verified by comparing the responses of tunable bandpass filters with and without harmonic suppression. Finally, a harmonic-suppressed tunable bandpass filter with constant bandwidth and passband shape is designed. A novel input and output coupling structure with a bandpass response is employed to maintain constant bandwidth and help reject both even- and odd-order harmonics. For each tuning state, two transmission zeros are created near the passband, ensuring high selectivity.
59 citations
TL;DR: In this paper, an indirect current control scheme of parallel hybrid power filter system (PHPF) with self-supporting dc bus to eliminate harmonics generated by the nonlinear load is presented.
Abstract: This paper presents an indirect current control scheme of parallel hybrid power filter system (PHPF) with self-supporting dc bus to eliminate harmonics generated by the nonlinear load. The PHPF system consists of a shunt passive filter with an active filter (AF) in series with it connected at the point of common coupling (PCC) in parallel with nonlinear load. The AF is realized using a three-phase voltage source inverter (VSI) with self supported dc bus. The compensation principles and dynamics of the system are discussed in detail. A proportional-integral (PI) controller over average dc bus voltage of the AF connected in series with passive filter is used for the control of the PHPF. The modeling equations of the PHPF are derived for compensation of harmonics generated by a three-phase rectifier load. The effectiveness of proposed control technique of the PHPF is demonstrated through simulated results under the dynamics of change of loads.
59 citations