Topic
Voltage-controlled filter
About: Voltage-controlled filter is a research topic. Over the lifetime, 5514 publications have been published within this topic receiving 70872 citations. The topic is also known as: VCF.
Papers published on a yearly basis
Papers
More filters
TL;DR: A novel circuit for realizing voltage-mode first-order and second- order all-pass filter responses as well as second-order notch filter response depending on the passive component choice, is presented.
Abstract: In this paper, a novel circuit for realizing voltage-mode first-order and second-order all-pass filter responses as well as second-order notch filter response depending on the passive component choice, is presented. This circuit has high input impedance; thus, it is easy to cascade the introduced filter with other voltage-mode topologies. Also, it uses a single Variable Gain Current Conveyer — VGCCII and only grounded capacitors. SPICE simulation results based on 0.35 μm TSMC CMOS technology parameters are given to confirm the theory.
20 citations
17 Jun 2005
TL;DR: In this article, a tunable bandpass BAW-filter based on a hybrid integration concept is presented. The filter consists of two cascaded lattices incorporating four BAW resonators, coupled with high-Q inductors and wide tuning range active varactors.
Abstract: We present a tunable bandpass BAW-filter based in a first step on a hybrid integration concept to demonstrate the validity of our architecture and to evaluate the potential of such filters. The filter consists of two cascaded lattices incorporating four BAW resonators, coupled with high-Q inductors and wide tuning range active varactors. The simulated results show that it is possible to compensate ±1% deviation on the filter center frequency. The prototype is currently in manufacturing and the experimental results will be available for the conference.
20 citations
18 Apr 2011
TL;DR: In this article, a single phase shunt active power filter based on instantaneous power theory is proposed to reduce the load current in a single-phase active filter, in which the active filter will be connected directly to the utility in order to reduce load current.
Abstract: This paper presents a single phase shunt active power filter based on instantaneous power theory. The active filter will be connected directly to utility in order to reduce THD of load current, in this case the utility is TNB. The instantaneous power theory also known as p-q theory is used for three phase active filter and this paper proves that the p-q theory can also be implemented for single phase active filter. Since the system has only single phase signal for both voltage and current, thus the dummy signal with 120 o different angels must be generated for input of the p-q theory. The p-q technique will generate six signals PWM for switching IGBT, but only two of the signals will be used to control the switching IGBT. The simulation results are on MATLAB/Simulink environment tools presented in order to demonstrate the performance of the current load on single phase shunt active power filter.
20 citations
14 Dec 2003
TL;DR: A fully reconfigurable channel select filter is presented which is used as a part of a multi mode direct conversion receiver which supports different modes including GSM, IS-95, and UMTS.
Abstract: A fully reconfigurable channel select filter is presented which is used as a part of a multi mode direct conversion receiver. The filter supports different modes including GSM, IS-95, and UMTS. A 4/sup th/ order Butterworth filter is realized in a g/sub n/ C filter topology. The filter circuit is implemented in a standard 0.35 /spl mu/m CMOS process. The filter is able to handle large input signals up to 600mVpp at a supply voltage of 2.7V. The circuit has a low current consumption of 620/spl mu/A, whereas the needed die size is only 530520/spl mu/m.
20 citations
Patent•
16 Jun 1995TL;DR: In this paper, an alternating current power system (12) supplying power to a load (16) includes a passive filter (26, 152) and an active filter (24, 150).
Abstract: An apparatus (10) and method for reducing distortion currents present in an alternating current power system (12) supplying power to a load (16) includes a passive filter (26, 152) and an active filter (24, 150). In a first embodiment, the passive filter (26) is operably connected to the power system (12) across the load (16) by a switching device (30). The active filter (24) is then connected across the switching device (30) and operated to draw a current equal to the current through the passive filter (26). The active filter (24) and the passive filter (26) are thereby connected in series across the load (16). The active filter (24) is controlled to draw a fundamental frequency component and to provide distortion currents required by the load (16). In a second embodiment, the active filter (150) is connected in parallel with a first circuit (154), the parallel combination of which is connected in series with a second circuit (156) across the load (16).
20 citations