FIRST-ORDER MEMRISTOR–CAPACITOR FILTER CIRCUITS EMPLOYING HP MEMRISTOR

2014 ◽  
Vol 23 (08) ◽  
pp. 1450116 ◽  
Author(s):  
HASAN SOZEN ◽  
UGUR CAM
Keyword(s):  
Input Frequency ◽  
Spice Simulation ◽  
Pass Filter ◽  
First Order ◽  
Spice Model ◽  
Low Pass ◽  
Initial Resistance ◽  
Simulation Results ◽  
High Pass ◽  
Resistance Value

The memristor has drawn the worldwide attention since it has been discovered at HP laboratory on 1 May 2008. Since then many researchers are taking efforts to find its applications in various areas. In this paper, we study the filter characteristics of first-order low pass and high pass filters employing memristor with a capacitor. The paper provides a comparative analysis between low pass and high pass filter circuits that utilizing ordinary resistor or memristor with a capacitor. The theoretical analyzes are verified with SPICE simulation results using a memristor SPICE model with nonlinear dopant drift and MATLAB environment. The effect of change of the input frequency and initial resistance value of memristor on the cut-off frequencies of the presented low pass and high pass filters are investigated. The memory effect of memristor is represented by simulation results.

Improved Electronically-Tunable Current-Mode Square-Root-Domain First-Order Multifunction Filter

2021 ◽  
pp. 2150190
Author(s):  
Manoj Kumar Jain
Keyword(s):  
Transient Response ◽  
Current Mode ◽  
Square Root ◽  
Spice Simulation ◽  
First Order ◽  
Low Pass ◽  
Multifunction Filter ◽  
Simulation Results ◽  
Electronically Tunable ◽  
High Pass

Some time back, Kircay reported an electronically-tunable current-mode square-root-domain first-order filter capable of realizing low-pass (LP), high-pass (HP) and all-pass (AP) filter functions. When simulated in SPICE, Kircay’s circuit has been found to exhibit DC offsets in case of LP and AP responses and incorrect transient response in case of HP response. In this paper, an improved circuit overcoming these difficulties/deficiencies has been suggested and its workability of the improved circuit as well as its capability in meeting the intended objectives has been demonstrated by SPICE simulation results.

scholarly journals REALIZATION OF FIRST-ORDER CURRENT-MODE FILTERS WITH LOW NUMBER OF MOS TRANSISTORS

2013 ◽  
Vol 22 (01) ◽  
pp. 1250071 ◽  
Author(s):  
ERKAN YUCE ◽  
SHAHRAM MINAEI ◽  
NORBERT HERENCSAR ◽  
JAROSLAV KOTON
Keyword(s):  
Low Voltage ◽  
Current Mode ◽  
Low Noise ◽  
Mos Transistors ◽  
Pass Filter ◽  
First Order ◽  
Saturation Region ◽  
Low Pass ◽  
High Pass ◽  
Nmos Transistors

In this paper, a new current-mode (CM) circuit for realizing all of the first-order filter responses is suggested. The proposed configuration contains low number of components, only two NMOS transistors both operating in saturation region, two capacitors and two resistors. Major advantages of the presented circuit are low voltage, low noise and high linearity. The proposed filter circuit can simultaneously provide both inverting and non-inverting first-order low-pass, high-pass and all-pass filter responses. Computer simulation results achieved through SPICE tool and experimental results are given as examples to demonstrate performance and effectiveness of the proposed topology.

A NEW ACTIVE NETWORK SUITABLE FOR REALIZING LADDER FILTERS AND TRANSFORMER SIMULATOR

2007 ◽  
Vol 16 (01) ◽  
pp. 29-41 ◽  
Author(s):  
ERKAN YUCE ◽  
SHAHRAM MINAEI
Keyword(s):  
Theoretical Analysis ◽  
Active Network ◽  
Spice Simulation ◽  
Passive Element ◽  
Passive Components ◽  
Matching Conditions ◽  
Low Pass ◽  
Simulation Results ◽  
General Configuration ◽  
High Pass

A general configuration suitable for realizing low-pass and high-pass ladder filters and transformer simulator, depending on the passive element selection is proposed. The proposed network employs only grounded passive components without requiring matching conditions. The values of the synthetic inductances of the transformer and low-pass ladder filter can be changed independently. SPICE simulation results confirming the theoretical analysis are included.

GROUNDED CAPACITOR FIRST-ORDER FILTERS INCLUDING CANONICAL FORMS

2006 ◽  
Vol 15 (02) ◽  
pp. 289-300 ◽  
Author(s):  
SUDHANSHU MAHESHWARI ◽  
IQBAL A. KHAN ◽  
JITENDRA MOHAN
Keyword(s):  
Computer Simulation ◽  
Input Voltage ◽  
Current Conveyor ◽  
Canonical Forms ◽  
First Order ◽  
Fully Differential ◽  
Low Pass ◽  
Simulation Results ◽  
Output Stages ◽  
High Pass

Six novel first-order filters with voltage input, voltage and current outputs employing a single fully differential current conveyor are proposed, three of which are canonical. All the circuits employ a grounded capacitor; and realize all-pass, low-pass and/or high-pass functions. Some circuits provide five distinct first-order functions or six functions with additional output stages. The proposed circuits are verified through computer simulation results.

A semi-lumped microstrip UWB bandpass filter

2009 ◽  
Vol 1 (1) ◽  
pp. 57-64 ◽  
Author(s):  
Darine Kaddour ◽  
Jean-Daniel Arnould ◽  
Philippe Ferrari
Keyword(s):  
Group Delay ◽  
Bandpass Filter ◽  
Filter Design ◽  
Sensitivity Study ◽  
Critical Parameters ◽  
Center Frequency ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
High Pass

In this paper, a miniaturized bandpass filter for ultra-wide-band applications is proposed. It is based on the embedding of high-pass structures in a low-pass filter. A semi-lumped technology combining surface-mounted capacitors and transmission lines has been used. The filter design rules have been carried out. Furthermore, two filters having a 3-dB fractional bandwidth of 142 and 150%, centered at 0.77 and 1 GHz, respectively, have been realized for a proof of concept. Measured characteristics, in good agreement with simulations, show attractive properties of return loss (|S11| <−18 dB), insertion loss (<0.3 dB), and a maximum group delay and group delay variation of 2 and 1.3 ns, respectively. A distributed filter based on the same low-pass/high-pass approach has been also realized and measured for comparison. The size reduction reaches 85% for the semi-lumped filter, and its selectivity is improved with a shape factor of 1.3:1 instead of 1.5:1. The semi-lumped filter's drawback is related to a smaller rejection bandwidth compared to the distributed one. To improve the high-frequency stopband, an original technique for spurious responses suppression based on capacitively loaded stubs has been proposed. Even if the performances do not reach that obtained for the distributed approach, with this technique spurious responses are pushed until eight times the center frequency. A sensitivity study vs. critical parameters has also been carried out, showing the robustness of the design.

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