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.

Data bus transceiver

Abstract: A data bus transceiver reduces self-induced noise by using trapezoidal drive waveforms. A differential receiver stage of the transceiver has a threshold voltage matched to the midpoint voltage of the drive waveform to reduce distortion, and a low-pass filter matched to the slew rate of the drive waveform to reduce noise while causing minimum progation delay. The transceiver has been integrated using back-to-back junction capacitors in the driver and filter circuits and these capacitors have been biased to reduce their variation in capacitance as a function of the voltage applied across them.

Electronically Tunable Current-Mode Universal Filter Employing CCCIIs and Grounded Capacitors

Abstract: This paper introduces an electronically tunable current-mode universal biquadratic filter using second generation current controlled conveyors (CCCIIs). The filter circuit is constructed with a CCCII, three dual current output CCCIIs (DO-CCCIIs) and two grounded capacitors. The circuit can realize low-pass, band-pass, high-pass, band-stop and all-pass transfer functions by choosing appropriate current output branches without any component matching conditions. Additionally, the circuit parameters can be tuned orthogonally by adjusting the bias currents of the CCCIIs. The biquadrtatic filter enjoys very low sensitivities with respect to the circuit active and passive components. Some examples are given together with simulated results by PSPICE.

Single-phase series active power filter with transformer-coupled matrix converter

Abstract: This study presents a series active power filter based on a single-phase matrix converter. Back-to-back voltage-source converters with nested control loops and passive filters are normally used for this application. A matrix converter, as proposed in this study, allows a simpler implementation both in terms of hardware (no grid filter and no DC link) and of control. Moreover, a novel zero-voltage compensation technique is introduced in order to reduce the distortion around the input voltage zero crossing. Simulations and experiments are used to validate the considered control methods, confirming the feasibility of the proposed architecture.

Adaptive Current Control for a Bidirectional Interleaved EV Charger With Disturbance Rejection

Abstract: This article presents a double integral sliding mode control (DSMC) and a variable phase-shift algorithm for bidirectional electric vehicle (BEV) charger based on front-end bridgeless converter. An interleaved phase-shifted bridgeless converter is widely preferred for ac–dc bidirectional power conversion due to its reduced switching loss and a significant decrease in passive filter components. However, the converter commutation process during phase-reversal in the presence of grid distortion often adds complexity to achieve zero voltage switching. Estimation of grid frequency and closer zero-crossing detection (ZCD) at the point of common coupling during abnormal grid conditions are the key challenges for the successive operation of bridgeless converter topology. This article describes an adaptive grid-frequency identification technique with noise uncertainty to identify a closer phase-reversal occurrence for ZCD. The DSMC, in addition, offers flexibility toward parametric variation with a gain adaptive control. A modification in the phase-shift algorithm of dc−dc power converter is also explained with the inclusion of charging dynamics of battery operation. The DSMC and phase-shift control with improved ZCD are implemented in Opal-RT platform to verify the charging performance with severe distorted grid conditions. A laboratory prototype for a 3.3-kW EV charger is also developed to validate the controller implementation for BEV charging operation.