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.

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.

scholarly journals Novel First-Order Current-Mode All-Pass Sections Using CCIII

2004 ◽  
Vol 27 (2) ◽  
pp. 111-117 ◽  
Author(s):  
Sudhanshu Maheshwari ◽  
Iqbal A. Khan
Keyword(s):  
Frequency Response ◽  
Transient Response ◽  
Current Mode ◽  
Current Conveyor ◽  
Third Generation ◽  
Spice Simulation ◽  
Passive Components ◽  
First Order ◽  
Simulation Results

Two new configurations realizing canonical first-order current-mode all-pass sections (APSs) using a single third generation current conveyor (CCIII) are given. Using each configuration, two types of first-order all-pass filters can be derived giving rise to four distinct circuits for APS, three of which are novel. Each APS employs only a single CCIII and a minimum of passive components: one resistor and one capacitor. The circuits are suited for MOS implementation. The SPICE simulation results for frequency response as well as transient response are incorporated to verify the theory.

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 First-Order Fully Cascadable Current-Mode Universal Filter Composed of Dual Output CCIIs and a Grounded Capacitor

2016 ◽  
Vol 25 (05) ◽  
pp. 1650042 ◽  
Author(s):  
Erkan Yuce ◽  
Shahram Minaei
Keyword(s):  
Second Generation ◽  
Current Mode ◽  
Passive Component ◽  
Current Conveyors ◽  
Universal Filter ◽  
First Order ◽  
Low Pass ◽  
In Series ◽  
Component Matching ◽  
High Pass

In this paper, a new first-order current-mode (CM) universal filter employing two dual output second-generation current conveyors (DO-CCIIs), one resistor and a grounded capacitor is proposed. The proposed filter has low input and high output impedances; thus, it can be easily connected with other CM circuits. It can simultaneously realize first-order low-pass (LP) and all-pass (AP) responses and can provide high-pass (HP) response with interconnection of LP and AP responses. It can be tuned electronically by replacing with dual output second-generation current controlled conveyors (DO-CCCIIs) instead of DO-CCIIs and removing the resistor. It has only a resistor but no capacitor connected in series to X terminal of DO-CCII; accordingly, it can be operated at high frequencies. Also, it does not need any critical passive component matching conditions and cancellation constraints. A number of simulation results based on SPICE program are included to exhibit performance, workability and effectiveness of the proposed filter configuration.

scholarly journals The voltage-mode first order universal filter using single voltage differencing differential input buffered amplifier with electronic controllability

2022 ◽  
Vol 12 (2) ◽  
pp. 1308
Author(s):  
Danupat Duangmalai ◽  
Peerawut Suwanjan
Keyword(s):  
Integrated Circuit ◽  
Universal Filter ◽  
Differential Input ◽  
First Order ◽  
Voltage Mode ◽  
Transconductance Amplifier ◽  
Low Pass ◽  
Simulation And Experiment ◽  
Electronically Tunable ◽  
High Pass

In this research contribution, the electronically tunable first-order universal filter employing a single voltage differencing differential input buffered amplifier (VD-DIBA) (constructed from two commercially available integrated circuit (IC): the operational transconductance amplifier, IC number LT1228, and the differential voltage input buffer, IC number AD830), one capacitor and two resistors. The features of the designed first order universal filter are as follows. Three voltage-mode first-order functions, low-pass (LP), all-pass (AP) and high-pass (HP) responses are given. The natural frequency (𝜔0) of the presented configuration can be electronically adjusted by setting the DC bias current. Moreover, the voltage gain of the LP and HP filters can be controllable. The phase responses of an AP configuration can be varied from 00 to −1800 and 1800 to 00. The power supply voltages were set at ±5 𝑉. Verification of the theoretically described performances of the introduced electronically tunable universal filter was proved by the PSpice simulation and experiment.

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.

scholarly journals Log-domain electronically-tuneable fully differential high order multi-function filter

2020 ◽  
Vol 10 (2) ◽  
pp. 1263
Author(s):  
Osama O. Fares
Keyword(s):  
Current Mode ◽  
Signal Flow Graph ◽  
Flow Graph ◽  
Signal Flow ◽  
Fully Differential ◽  
Low Pass ◽  
Band Pass ◽  
Simulation Results ◽  
Log Domain ◽  
High Pass

This paper presents the synthesis of fully deferential circuit that is capable of performing simultaneous high-pass, low-pass, and band-pass filtering in the log domain. The circuit utilizes modified Seevinck’s integrators in the current mode. The transfer function describing the filter is first presented in the form of a canonical signal flow graph through applying Mason’s gain formula. The resulting signal flow graph consists of summing points and pick-off points associated with current mode integrators within unity-gain negative feedback loops. The summing points and the pick-off points are then synthesized as simple nodes and current mirrors, respectively. A new fully differential current-mode integrator circuit is proposed to realize the integration operation. The proposed integrator uses grounded capacitors with no resistors and can be adjusted to work as either lossless or lossy integrator via tuneable current sources. The gain and the cutoff frequency of the integrator are adjustable via biasing currents. Detailed design and simulation results of an example of a 5th order filter circuit is presented. The proposed circuit can perform simultaneously 5th order low-pass filtering, 5th order high-pass filtering, and 4th order band-pass filtering. The simulation is performed using Pspice with practical Infineon BFP649 BJT model. Simulation results show good matching with the target.

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.

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