Design of Bandpass Filter for Receiver
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Butterworth-type and Bessel function-type two ways are used for design of Bandpass filter for receiver,and with the help of EDA simulation tools,the bold plot and the group delay characteristics of the filters designed are compared.Bessel function design simulation results show the small pass-band ups,stop-band attenuation,in the pass-band with a better group delay characteristics,which can meet the design requirements.Keywords:
Butterworth filter
Bessel filter
Electronic filter topology
Network synthesis filters
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Easily evaluated approximate expressions for the nominal time delay of a practical low-pass filter are presented. These are obtained from bounds on the error on the unit step response of these filters.
Network synthesis filters
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In this brief, an efficient implementation of reconfigurable warped digital filter with variable low-pass, high-pass, bandpass, and bandstop responses is presented. The warped filters, obtained by replacing each unit delay of a digital filter with an all-pass filter, are widely used for various audio processing applications. However, warped filters require first-order all-pass transformation to obtain variable low-pass or high-pass responses, and second-order all-pass transformation to obtain variable bandpass or bandstop responses. To overcome this drawback, the proposed method combines the warped filters with the coefficient decimation technique. The proposed architecture provides variable low-pass or high-pass responses with fine control over cut-off frequency and variable bandwidth bandpass or bandstop responses at an arbitrary center frequency without updating the filter coefficients or filter structure. The design example shows that the proposed variable digital filter is simple to design and offers substantial savings in gate counts and power consumption over other approaches.
Half-band filter
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This paper describes a type of periodically time varying (PTV) digital filter. Such a filter of period M, simulates the response of a bank of M bandpass filters with their outputs connected to a rotating switch, and requires less multiplications per output sample. A theoretical analysis of the filters is presented, followed by a description of a method of design. A design of a 12-channel filter for use in transmultiplexing is considered.
Filtering theory
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Butterworth function is used to design band-pass filter with central frequency of 750kHz.The band-pass filte radio is used in frequency therapy device in order to diminish interfere to other cooperating equipments.Simulation and optimization of this model is developed by using Matlab software.The testing circuitwhich result shows appropriate performance to original design.Meanwhile,feasibility and suitability is proveded by this method,which can be used in design of other filters.
Butterworth filter
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In this paper, the design of two-dimensional (2D) notch filter using bandpass filter and fractional delay filter is presented. First, the design of 2D notch filter is decomposed into the designs of 2D parallel-line filter and straight-line filter. Then, parallel-line filter is designed by bandpass filter and straight-line filter is designed by fractional delay filter. Next, the FIR fractional delay filters are used to implement the designed notch filter. Finally, several numerical examples are demonstrated to show the effectiveness of the proposed design method.
Voltage-controlled filter
Butterworth filter
Capacitor-input filter
Electronic filter topology
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This paper presents a fast implementation method of a wideband Butterworth of a band pass filter for acquisition of human heart sound to simplify the traditional design work. The range of filter frequency emulates an acoustic stethoscope with bell mode and diaphragm mode. The integrated method includes theoretical design, simulation, and implementation regulation. During theoretical design stage, component values of simplified filter architecture are calculated according to the pass band requirement for filtering the heart sound. Then, a design tool TINA-TI is used to simulate the performance of the filter design and to obtain proper components value. Experimental results show that the obtained resistor ratio factors are 1.27 for the high pass filter and 1.04 for the low pass filter. A human heart sound is also used to demonstrate the feasibility of this approach. The proposed method can also be used to design Butterworth band pass filters for other applications.
Butterworth filter
Voltage-controlled filter
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A design of the Butterworth low-pass filter is proposed based on WEBENCH software.The paper explores theoretical characteristics of Butterworth low-pass filter,and the design of the two-order filter circuit with voltage-controlled voltage source.The design of Butterworth low-pass filter has been simulated through TI WEBENCH software so that the operational amplifier and peripheral components parameter of the filter are determined.The validity of the design scheme is verified through the analysis of frequency response and step response of filter closed loop.Research shows that it can complete the filter design rapidly and effectively by using WEBENCH software,and it has some referential values for the design of the actual filter.
Butterworth filter
Voltage-controlled filter
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A signal is the entity that carries information. In the field of communication signal is the time varying quantity or functions of time and they are interrelated by a set of different equations, but some times processing of signal is corrupted due to adding some noise in the information signal and the information signal become noisy. It is very important to get the information from corrupted signal as we use filters. In this paper, Butterworth filter is designed for the signal analysis and also compared with other filters. It has maximally flat response in the pass band otherwise no ripples in the pass band. To meet the specification, 6th order Butterworth filter was chosen because it is flat in the pass band and has no amount of ripples in the stop band.
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Elliptic filter
SIGNAL (programming language)
Network synthesis filters
Voltage-controlled filter
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Citations (50)
It is shown that if a bandpass filter is obtained from a prototype low-pass filter by the usual low-pass to bandpass transformation, the white-noise margin and the (1/f)^2 noise margin of the resulting filter will be identical to the white-noise margin of the prototype low-pass filter. A method for using this general result for evaluating some types of integrals that arise in noise calculations is indicated.
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SIGNAL (programming language)
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