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In this paper, a cost-effective and reliable equivalent series resistance (ESR) estimation method for aluminium electrolytic capacitors used as DC-link capacitors in front-end rectifier fed inverters is proposed. The proposed method is based on the extraction of switching frequency components of DC-link voltage and current using band-pass filters. A limiting value of switching frequency is identified,...
The equivalent circuit of square-loop-resonator (SLR) bandpass filter (BPF) with cross-shaped I/O coupling is investigated to be analyzed and compared with the 3D electromagnetics (EM) simulator result. The proposed SLR BPF is designed for X-band frequency application with the center frequency of 9GHz and the −3dB fractional bandwidth larger than 3%. The analysis method is carried out by separating...
Efficient and smart techniques for analog data acquisition and processing may play crucial role in the design of miniature wearable devices, meant to continuously record, process and wirelessly transmit vital physiological parameters for real time health monitoring. In this work we propose a low-power, all-analog processing unit for an MPG (magneto-plethysmograph) based wearable device, which is meant...
Based on the requirement of IPD RF SIP application, the silicon based inductor and capacitor and rules have been studied at first. Meanwhile, a two-order silicon-based 2.4GHz bandpass filter with the size of 1.8mm*1.8mm was obtained by the combination of inductances and capacitors. The insertion loss at 2.4GHz is −1.35dB. Furthermore, to improve the selective of the bandpass filter, one transmission...
We report on a tunable terahertz bandpass filter based on a cross-shaped slot resonator with a reconfigurable roll-up micro structures. The built-in capacitors within the resonator are electrostatically actuated to shift the resonant frequency.
This paper deals with the study on equivalent circuit of wideband bandpass filter (BPF) constructed using groundplane windowed split ring resonator (SRR). The study also covers realization and characterization of wideband BPF as well as its result comparison. The proposed wideband BPF is composed of 3 cascaded groundplane windowed SRR connected with microstrip lines. The equivalent circuit comprises...
In this paper a newly proposed active element namely Dual X current conveyor differential input transconductance amplifier (DXCCDITA) is used in designing two grounded inductance (GI) simulators and a generalized immittance simulator topology which can realize floating inductor (FI), floating capacitor (FC) and floating resistor (FR) based on passive elements selected. All the designed simulators...
This paper describes a simple approach of re-configurable bandpass filter based on stepped impedance res- onator (SIR) transmission lines, particularly suitable for X-Band military communication application. In the proposed design, shifting of frequency from downlink to uplink frequency response is achieved by strategically placing three Variable capacitor (Varicap), at locations where the capacitors...
In this paper, a new area-effective complex-filter topology which can be used as an image-reject filter in low-IF receiver is proposed. A first-order image-reject filter obtained according to a new topology which corresponds to a complex shunt RC circuit. To demonstrate the usefulness of filter, simulation results of the filter are obtained by using SPECTRE in the CADENCE design tool.
A new kind of metamutator namely “Current Inverting Metamutator,” its realizations using different types of active blocks and some of its applications are given in this paper. As a classical application of the metamutator simulation of a memristor and, as an original application, several schemes realizing universal filters are proposed. The post-layout characteristics of both applications, using TSMC...
A novel Programmable Analog Array of fractional-order filters is proposed in this paper. It is constructed from an active core which is implemented using Current Feedback Operational Amplifiers as active elements. The scheme offers the realization of lowpass, highpass, bandpass, and bandstop fractional-order filter functions of various orders, and this is achieved through the utilization of resistor...
Universal Bi-quadratic Filters (UBF) are popular because of its versatility in realizing any type of filter desired by the user. This manuscript deals with designing low complexity voltage mode UBF using Current Feedback Amplifier (CFA). Three new circuits are reported. The attractive features of these circuits include: employment of grounded capacitors, orthogonal adjustment of frequency response...
A systematic synthesis approach for designing a voltage-mode multifunction operational transconductance amplifier (OTA)-C biquadratic has been described using programmable first order filter. The proposed filter shows lower sensitivities, high frequency response, lower output noise. The proposed second order filter has been converted to third order butterworth and elliptic filter employing a single...
This paper proposes a realization of an electronically tunable voltage-mode phase shifter section using a single voltage differencing buffered amplifier (VDBA) as an active component, together with one floating capacitor and one grounded resistor as passive components. The proposed circuit is efficient of providing an electronic control of the natural angular frequency (fflb) through the transconductance...
This paper presents a widely tunable balanced-to-unbalanced (balun) bandpass filter (BPF). The proposed balun uses two 2-port N-path BPFs with embedded quadrature phase shifting to achieve the single-ended to differential conversion. Analytical expressions for the in-band (IB) differential to single-ended (DS) and single-ended to differential (SD) voltage gains are derived and validated. A prototype...
A new structure of a bandpass filter with steep left slope of the frequency response, tunable by ferroelectric capacitors, is proposed. The filter can be used in receiving channel (RX) in communication systems of DCS, PCS and UMTS standards. The computer simulation of the frequency responses of the filter has been performed for the following conditions: feasible parameters of ferroelectric capacitors;...
Unconventional connection of ferroelectric capacitors to resonators of tunable filters is proposed. It has increased the required minimum of capacitance value and the frequency range from ku-band to K-band. The proposed method of connection is illustrated by an example of microstrip filter, which is tunable within the frequency range 18–20 GHz. The minimum capacitance of the ferroelectric capacitor,...
This paper presents optimized balanced microstrip filters, in terms of size and design simplicity, by combining multi-section mirrored stepped impedance resonators (SIRs) and interdigital capacitors. The mirrored SIRs provide the necessary transmission zeros (for both the differential- and common-mode responses) to simultaneously achieve a broad stopband for the differential mode and efficient common...
This paper deals with the design of continuous-time analog band-reject filter in 32 nm CMOS technology intended for biomedical applications using analog front-end (AFE). The work focuses on miniaturization and ultra low power consumption, needed in implantable devices running on battery. The circuit can process signals in the frequency range of 0.01 Hz to 300 Hz while filtering AC mains frequency...
A novel single input multiple output (SIMO) voltage-mode (VM) digitally programmable universal filter (DPUF) is proposed in this paper. The proposed biquad is realized using digitally programmable current feedback amplifier (DPCFA) as main analog building block (ABB). The biquad can concurrently simulate all filters functions without requiring any alteration in its configurations all the filter parameters...
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