Topic
Band-stop filter
About: Band-stop filter is a research topic. Over the lifetime, 11161 publications have been published within this topic receiving 127088 citations. The topic is also known as: BSF.
Papers published on a yearly basis
Papers
More filters
01 Jan 2013
TL;DR: In this paper, a third-order Chebyshevlow-pass filter, using Gm-C structure, based on Nauta's OTA, is presented for 60GHz wireless communication using 65nm CMOS process and 1.2V power supply.
Abstract: A third-order Chebyshevlow-pass filter, using Gm-C structure, based on Nauta's OTA, is presented. The filter is designed for 60GHz wireless communication using 65nm CMOS process and 1.2V power supply. The cutoff frequency of the filter is required to be tuned from 1GHz to 5GHz.UsingNauta'stransconductance characteristics, the filter can be operated at ultra-high frequency band and has a high linearity and wideband frequency. From the results of the post-simulation, the cutoff frequency of the filter can be tuned from 631MHz to 5.027GHz. The gain in the pass band is nearly 2dB in high impedance. The adjacent channel rejection is about 26dB. The ripple in pass band is about1.1dB.
26 Dec 2006
TL;DR: An improved dynamic range analog-to-digital converter (ADC) subsystem is proposed that utilizes a passive superconducting microwave dispersive filter and a digital signal processor.
Abstract: An improved dynamic range analog-to-digital converter (ADC) subsystem is proposed that utilizes a passive superconducting microwave dispersive filter and a digital signal processor. The signal to be converted is passed through a superconducting passive filter and the output from the filter is used as the input to a low-temperature superconductor (LTS) ADC. The dispersive filter can be made using either a superconducting electromagnetic delay line or a microwave acoustic delay line with superconducting electrodes. The dispersive filter convolves its impulse response with the input signal to be converted. If the filter is implemented as a surface acoustic wave device it would not introduce any spurious intermodulation terms since it is a linear device. After the analog-to-digital conversion, the digital signal processor compresses the filter's dispersion back into an impulse. The effective gain in dynamic range is provided by the pulse compression gain of the dispersive filter.
20 Apr 2008
TL;DR: In this paper, a second-order differential type class-AB log-domain universal filter is proposed, which can simultaneously realize lowpass (LP), high-pass (HP), bandpass (BP), notch (N), and allpass (AP) responses.
Abstract: In this paper, a new current-mode second-order differential type class-AB log-domain universal filter is proposed. The design is based on the state-space synthesis method. It has simple differential type class-AB structure and using minimum components. The proposed filter has one input and five outputs and can simultaneously realize lowpass (LP), highpass (HP), bandpass (BP), notch (N), and allpass (AP) responses without any changes in the circuit topology. The natural frequency, and the quality factor of the filter can be electronically tuned by changing external currents. Only NPN transistors and grounded capacitors were used, and operated with single power supply of 2 V. PSPICE simulations are given to confirm the theoretical analysis.
Patent•
20 Sep 2019
TL;DR: In this paper, the authors proposed a method for suppressing the resonance of a servo drive system by discretizing a notch filter and performing parameter correction on the discretized filter.
Abstract: An embodiment of the invention provides a method for suppressing resonance of a servo drive system. The method comprises the steps of obtaining notch filter parameters, and discretizing a notch filter according to the notch filter parameters to construct a discretized notch filter; performing parameter correction on the discretized notch filter to construct a corrected notch filter; and connecting the corrected notch filter to a loop of the servo drive system to suppress the resonance of the system. According to the method, the notch filter used for suppressing the resonance of the servo system is corrected, so that the problem of characteristic distortion of the discretized notch filter is solved, the correction effect is remarkable, the resonance suppression effect of the servo drive system can be effectively improved, and the decrease of the control performance of the servo drive system is avoided. Embodiments of the invention further provide a device for suppressing the resonance of the servo drive system, and the servo drive system.
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TL;DR: The design and construction of an analog tracking filter to monitor EEG waves, is presented, based on a constant bandwidth passive tuned bandpass filter and a feedback control unit to automatically tune the filter to the correct frequency.
Abstract: The design and construction of an analog tracking filter to monitor EEG waves, is presented. The design is based on a constant bandwidth passive tuned bandpass filter and a feedback control unit to automatically tune the filter to the correct frequency. The control voltage of the feedback loop indicates the frequency of the input EEG signal. The filter tends to tune to the frequency where there is maximum energy.