Fast Locking Time Biquadratic Band-Pass Filter Utilizing Nonlinear Sliding-Mode Controller

2020 ◽  
pp. 2150154
Author(s):  
Darko Mitić ◽  
Goran Jovanović ◽  
Mile Stojčev ◽  
Dragan Antić
Keyword(s):  
Input Signal ◽  
Sliding Mode ◽  
Design Procedure ◽  
Signal Frequency ◽  
Sliding Mode Controller ◽  
Band Pass Filter ◽  
Central Frequency ◽  
Pass Filter ◽  
Bicmos Technology ◽  
Band Pass

This paper considers design procedure of fast locking time self-tuning [Formula: see text] biquadratic band-pass filter with nonlinear sliding mode control. A sliding mode controller is building block of the phase control loop (PCL) involved to push central frequency to reach input signal frequency very fast, approximately 100–200[Formula: see text]ns. The sliding mode controller is realized by using a tunable delay line, enabling optimal filter locking time for different input signal frequencies. The filter possesses low sensitivity to component discrepancy and is applied as a selective amplifier. The 0.13[Formula: see text][Formula: see text]m SiGe BiCMOS technology has been utilized for design and verification of the presented filter. This filter has central frequency up to 220[Formula: see text]MHz, quality factor [Formula: see text] and 25[Formula: see text]dB gain.

SELF-TUNING BIQUAD BAND-PASS FILTER

2013 ◽  
Vol 22 (03) ◽  
pp. 1350008 ◽  
Author(s):  
GORAN JOVANOVIĆ ◽  
DARKO MITIĆ ◽  
MILE STOJČEV ◽  
DRAGAN ANTIĆ
Keyword(s):  
Dynamic Range ◽  
Signal Frequency ◽  
Band Pass Filter ◽  
Central Frequency ◽  
Pass Filter ◽  
Input Signal Frequency ◽  
Bicmos Technology ◽  
Self Tuning ◽  
Band Pass ◽  
Constant Bandwidth

One approach to design self-tuning gm-C biquad band-pass filter is considered in this paper. The phase control loop is introduced to force filter central frequency to be equal to input signal frequency what is achieved by adjusting the amplifier transconductance gm. Thanks to that, the filter is robust to parameter perturbations and it can be used as a selective amplifier. In the full tuning range, it has a constant maximum gain at central frequency as well as a constant bandwidth. The 0.25 μm SiGe BiCMOS technology was used during design and verification of the band-pass filter. The filter has 26 dB gain, quality factor Q = 20 and central frequency up to 150 MHz. Simulation results indicate that the total in-band noise is 59 μV rms , the output third intercept point OIP3 = 4.36 dB and the dynamic range is 35 dB. Maximal power consumption at 3 V power supply is 1.115 mW.

scholarly journals Design and Development of Filtering Antenna for S-Band Applications with High out-of-band Rejection

2019 ◽  
Vol 9 (1S) ◽  
pp. 180-187
Keyword(s):  
Antenna Array ◽  
Patch Antenna ◽  
Equivalent Circuit Model ◽  
Design Procedure ◽  
Pass Band ◽  
Band Pass Filter ◽  
Coupled Resonators ◽  
Pass Filter ◽  
Antenna Structure ◽  
Band Pass

In this paper, the design, simulation and fabrication of a filtering antenna is proposed. The filtering antenna structure is, therefore, framed by integrating elements, such as the feed line, parallel coupled resonators and the microstrip patch antenna array. The combined elements are designed for third order Chebyshev band pass filter with a pass band ripple of 0.1 dB and the integrated structure is more suitable for different S-band (2 GHz – 4 GHz) wireless applications. The equivalent circuit model for the proposed filtering antenna structure is analysed and the design procedure of the filter is also presented in detail. The 1x2 rectangular patch antenna array acts both as a radiating element and also as the last resonator of the band pass filter. The proposed filtering antenna structure results in high out-of-band rejection, enhanced bandwidth and a gain of about 209 MHz and 1.53 dB. The fabricated result agrees well with the simulation characteristics

A 0.8/2.4 GHz Tunable Active Band Pass Filter in InP/Si BiCMOS Technology

2014 ◽  
Vol 24 (1) ◽  
pp. 47-49 ◽  
Author(s):  
Zhiwei Xu ◽  
Julia McArdle-Moore ◽  
Thomas C. Oh ◽  
Samuel Kim ◽  
Steven T. W. Chen ◽  
...  
Keyword(s):  
Band Pass Filter ◽  
Pass Filter ◽  
Active Band ◽  
Bicmos Technology ◽  
Band Pass

scholarly journals Novel Resonant Structure to Compact Partial H-Plane Band-Pass Waveguide Filter

2017 ◽  
Vol 7 (1) ◽  
pp. 266
Author(s):  
Elahe Mohhamadi ◽  
Habib Ghorbaninejad
Keyword(s):  
Cross Section ◽  
Design Procedure ◽  
Band Pass Filter ◽  
Frequency Range ◽  
Resonant Structure ◽  
Pass Filter ◽  
Section Size ◽  
Longitudinal Length ◽  
Band Pass ◽  
Waveguide Filter

In this paper partial H-plane band-pass waveguide filter, utilizing a novel resonant structure comprising a metal window along with metal posts has been proposed to compact the filter size. The metal windows and posts have been implemented transversely in a partial H-plane waveguides, which have one-quarter cross section size compared to the conventional waveguides in the same frequency range. Partial H-plane band-pass waveguide filter with novel proposed resonant structures has considerably shorter longitudinal length compared to the conventional partial H-plane filters, so that they reduce both cross section size and the total length of the filter compared to conventional H-plane filters, in the same frequency range. In the presented design procedure, the size and shape of each metal window and metal posts has been determined by fitting the transfer function of the proposed resonant structure to that of a desired one, which is obtained from a suitable equivalent circuit model. The design process is based on optimization using electromagnetic simulator software, HFSS. A proposed partial H-plane band-pass filter has been designed and simulated to verify usefulness and performance of the design method.

scholarly journals Implementation of an Inductorless 5th Order Band-Pass Filter

2021 ◽  
Author(s):  
Ara Abdulsatar Assim Assim
Keyword(s):  
Communication Systems ◽  
Order Approximation ◽  
Design Procedure ◽  
Operational Amplifiers ◽  
Band Pass Filter ◽  
Analog Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Band Pass

This paper demonstrates the design and implementation of an inductorless analog band-pass filter (BPF). Band-pass filters are widely used in communication systems, wireless transceivers and audio systems, they only pass signals within a desired frequency range. The principles mentioned in this article can be generalized to design any analog filter regardless of its order, approximation and prototype. The design procedure can be broken down into three main parts, first of all, a passive low-pass filter (LPF) is implemented, then the passive LPF is converted into a passive BPF. Finally, the passive BPF is transformed into an active BPF by adding operational amplifiers. The active BPF is then modified into two different topologies, the first in which the inductors are replaced with simulated- inductors (gyrators), while in the second topology, less operational amplifiers are used. <br>

scholarly journals Sampling frequency affects the processing of Actigraph raw acceleration data to activity counts

2016 ◽  
Vol 120 (3) ◽  
pp. 362-369 ◽  
Author(s):  
Jan Christian Brønd ◽  
Daniel Arvidsson
Keyword(s):  
Physical Activity ◽  
Frequency Band ◽  
Sampling Frequency ◽  
Signal Frequency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Acceleration Data ◽  
Varied Degree ◽  
Band Pass ◽  
Acceleration Signals

ActiGraph acceleration data are processed through several steps (including band-pass filtering to attenuate unwanted signal frequencies) to generate the activity counts commonly used in physical activity research. We performed three experiments to investigate the effect of sampling frequency on the generation of activity counts. Ideal acceleration signals were produced in the MATLAB software. Thereafter, ActiGraph GT3X+ monitors were spun in a mechanical setup. Finally, 20 subjects performed walking and running wearing GT3X+ monitors. Acceleration data from all experiments were collected with different sampling frequencies, and activity counts were generated with the ActiLife software. With the default 30-Hz (or 60-Hz, 90-Hz) sampling frequency, the generation of activity counts was performed as intended with 50% attenuation of acceleration signals with a frequency of 2.5 Hz by the signal frequency band-pass filter. Frequencies above 5 Hz were eliminated totally. However, with other sampling frequencies, acceleration signals above 5 Hz escaped the band-pass filter to a varied degree and contributed to additional activity counts. Similar results were found for the spinning of the GT3X+ monitors, although the amount of activity counts generated was less, indicating that raw data stored in the GT3X+ monitor is processed. Between 600 and 1,600 more counts per minute were generated with the sampling frequencies 40 and 100 Hz compared with 30 Hz during running. Sampling frequency affects the processing of ActiGraph acceleration data to activity counts. Researchers need to be aware of this error when selecting sampling frequencies other than the default 30 Hz.

scholarly journals An 550-650 MHz Digitally-Tunable Bandpass Filter: Design and Implementation

2019 ◽  
Vol 17 (12.2) ◽  
pp. 13
Author(s):  
Nguyen Xuan Quyen ◽  
Vu Dang Quang
Keyword(s):  
Filter Design ◽  
Band Pass Filter ◽  
Central Frequency ◽  
Pass Filter ◽  
Filter Model ◽  
Varactor Diodes ◽  
Band Pass ◽  
Dc Bias ◽  
Lc Resonators ◽  
Chebyshev Filter

In this paper, a digitally-tunable band-pass filter is designed and implemented for applications of Cognitive Radio in middle Ultra high frequency television band from 550 to 650 MHz. This design is based on the 3th-order Chebyshev filter model in the combination with impedance inverters and series LC resonators, where capacitors are replaced by varactor diodes. The central frequency is tuned by means of a digital control board to adjust DC bias voltages of the diodes. Theoretical analysis, numerical simulation, and hardware implementation are described and carried out. The RF board is fabricated using SMV1736 varactor diodes with FR4-0.8mm material. The results show good match between simulations and measurements in terms of return loss, insertion loss, and fractional bandwidth over the operating range.

The Design of Interference Generator for Grid Based on 89S52

2012 ◽  
Vol 490-495 ◽  
pp. 1772-1776
Author(s):  
Xiao Zhen Li ◽  
Yuan Jiang
Keyword(s):  
Pulse Width ◽  
Sine Wave ◽  
Signal Frequency ◽  
Band Pass Filter ◽  
Output Frequency ◽  
Pass Filter ◽  
Filter Output ◽  
Band Pass ◽  
Rc Circuit ◽  
Grid Based

The minimum microcontroller system is adopted in this paper to produce sine wave, achieve key control, and realize frequency display and measurement, which enable the circuit to automatically change and measure the filter output frequency. In the system 4011 chip and external RC circuit adjust pulse width and the number of bursts, Two-stage second-order active band-pass filter is used to filter out interfering signals so to get the fundamental signals. The 89s52 microcontroller programming regulate the signal frequency and amplitude which is realized through keyboards and shown on LED

HIGH QUALITY FACTOR L-BAND ACTIVE INDUCTOR-BASED BAND-PASS FILTERS

2013 ◽  
Vol 22 (03) ◽  
pp. 1350014 ◽  
Author(s):  
V. STORNELLI ◽  
L. PANTOLI ◽  
G. LEUZZI
Keyword(s):  
Dynamic Range ◽  
High Dynamic Range ◽  
Wide Frequency Range ◽  
Active Inductor ◽  
Band Pass Filter ◽  
Central Frequency ◽  
Pass Filter ◽  
High Q ◽  
Band Pass ◽  
High Dynamic

In this letter, a tunable high-Q active inductor with high dynamic range is presented. The equivalent inductance and resistance values can be tunable in a wide frequency range by changing the compensating network components values; outside the operating frequency band, the equivalent resistance increases, improving signal rejection for band-pass filter applications. A second-order active band-pass filter with a central frequency of 2100 MHz using the high-Q active inductance has been fabricated and tested.

A Comparison of Three Active Analogue Band-Pass Filter Circuits

1984 ◽  
Vol 21 (1) ◽  
pp. 27-38
Author(s):  
J. P. Newsome
Keyword(s):  
Operational Amplifier ◽  
Design Procedure ◽  
Operational Amplifiers ◽  
Band Pass Filter ◽  
Gain Bandwidth ◽  
Pass Filter ◽  
Active Band ◽  
Amplifier Gain ◽  
Band Pass ◽  
Filter Specification

This tutorial paper outlines the design procedure and compares the response of three different forms of active band-pass filter circuit, which are designed to meet the same basic filter specification. The paper shows in particular how the response varies with the spread of operational amplifier gain-bandwidth product; this spread exists, in practice, amongst operational amplifiers of any given type.

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