REALIZATION OF A GENERAL RESISTORLESS ACTIVE BIQUAD USING CBTA

2012 ◽  
Vol 21 (01) ◽  
pp. 1250013 ◽  
Author(s):  
MEHMET SAGBAS ◽  
MUHAMMET KOKSAL
Keyword(s):  
Integrated Circuit ◽  
Pass Band ◽  
Active Components ◽  
Order Filter ◽  
Low Pass ◽  
Band Pass ◽  
Transconductance Amplifiers ◽  
Electronically Tunable ◽  
High Pass ◽  
Circuit Technology

In this paper, a general electronically tunable resistorless biquad, which realizes current ratio transfer function using current backward transconductance amplifiers is proposed. The biquad contains only two active components and two grounded capacitors, which make it convenient for production by the integrated circuit technology. The proposed biquad realizes all of the basic second order filter characteristics: low pass, high pass, band pass, band reject, and finally all pass. It is convenient for cascading with other similar biquads as well as with any two-port circuit with low impedance input to achieve higher order filter characteristics. The simulations that are performed using PSPICE simulator exhibit satisfactory results coherent with the theory.

Second-Order Voltage-Mode Universal Filters Using Two DVCCs, Two Grounded Capacitors and Four Resistors

2016 ◽  
Vol 25 (12) ◽  
pp. 1650154 ◽  
Author(s):  
Ahmet Abaci ◽  
Erkan Yuce
Keyword(s):  
Integrated Circuit ◽  
Matching Condition ◽  
Second Order ◽  
Point Of View ◽  
Pass Band ◽  
Current Conveyors ◽  
Voltage Mode ◽  
Low Pass ◽  
Band Pass ◽  
High Pass

In this paper, two new second-order voltage-mode universal filters are proposed. Both of the proposed filters use only two differential voltage current conveyors (DVCCs), four resistors and two grounded capacitors which are advantageous from integrated circuit technology point of view. They can simultaneously provide second-order low-pass, high-pass, band-pass, notch and all-pass responses. They offer orthogonal control of angular resonance frequency and quality factor. However, they have a single matching condition for only all-pass responses. A number of simulations based on SPICE program are accomplished in order to demonstrate the performance of both filters.

A NEW ELECTRONICALLY-TUNABLE ACTIVE-ONLY UNIVERSAL BIQUAD

2011 ◽  
Vol 20 (03) ◽  
pp. 549-555 ◽  
Author(s):  
A. K. SINGH ◽  
R. SENANI ◽  
D. R. BHASKAR ◽  
R. K. SHARMA
Keyword(s):  
Pass Band ◽  
Voltage Mode ◽  
Op Amp ◽  
Op Amps ◽  
Reasonable Number ◽  
Low Pass ◽  
Band Pass ◽  
Electronically Tunable ◽  
High Pass ◽  
Realization Condition

A number of configurations for realizing voltage-mode (VM) biquads using op-amps and OTAs have been presented in the literature, however, none of these provide the following desirable properties simultaneously: (i) realizability of all the five standard filters (namely; low pass, high pass, band pass, band stop and all pass), (ii) tunability of all the three filter parameters (namely; ω0, bandwidth or Q0 and gain) and (iii) not requiring any realization condition in any of the five filter responses. This paper presents a new configuration which does possess all the above mentioned desirable properties simultaneously while using only two internally-compensated type op-amps and a reasonable number of OTAs. The workability of the new configuration has been demonstrated by SPICE simulations based upon CMOS Op-amp and CMOS OTAs.

Programmable Universal Filters Using Current Conveyor Transconductance Amplifiers

2017 ◽  
Vol 26 (07) ◽  
pp. 1750121 ◽  
Author(s):  
Thanat Nonthaputha ◽  
Montree Kumngern
Keyword(s):  
Transfer Functions ◽  
Current Mode ◽  
Current Conveyor ◽  
Pass Band ◽  
Cmos Process ◽  
Low Pass ◽  
Band Pass ◽  
Transconductance Amplifiers ◽  
Biquadratic Filters ◽  
High Pass

This paper presents new programmable universal biquadratic filters using current conveyor transconductance amplifiers (CCTAs) by which both voltage- and current-mode filters can be obtained. The proposed filters use second-generation current conveyor (CCII) which is the first stage of CCTA to operate as current conveyor analog switch (CCAS) and this CCAS will be used to program the filtering functions such as low-pass, high-pass, band-pass, band-stop and all-pass filters. Unlike previous universal filters, the filtering functions of the proposed filters can be programmed using the bias currents of CCTAs without changing any input and output connections. The natural frequency and quality factor of all filtering functions can be controlled electronically and orthogonally using the bias currents of transconductance amplifiers. Also gain response of all transfer functions can be adjusted. The active and passive sensitivities of the filters are low. The proposed programmable filters have been simulated using 0.18[Formula: see text][Formula: see text]m CMOS process from TSMC. PSPICE simulation results are included to confirm workability of the proposed circuits.

CDTAs Based Current-Mode Universal Biquad Filters with Orthogonal Control of Quality Factor and Pole Frequency

2013 ◽  
Vol 787 ◽  
pp. 501-507
Author(s):  
Saksit Summart ◽  
Chanchai Thongsopa
Keyword(s):  
Quality Factor ◽  
Integrated Circuit ◽  
Current Mode ◽  
Pass Band ◽  
Cascade Connection ◽  
Low Pass ◽  
Band Pass ◽  
High Output Impedance ◽  
Further Development ◽  
High Pass

This article presents current-mode universal biquad filters based on CDTAs. The filter circuits using four CDTAs and two grounded capacitors which are able to provide low-pass, high-pass, band-pass, band-reject and all-pass functions. The pole frequency can be orthogonally controlled from quality factor and the circuits have high output impedance appropriate for cascade connection application in current mode which is capable to directly drive load. This qualification is very appropriate for further development into an integrated circuit. The results of PSPICE simulation program are corresponding to the theoretical analysis.

Current-Mode nth-Order Filter Based on a Minimal Component

2016 ◽  
Vol 25 (05) ◽  
pp. 1650035 ◽  
Author(s):  
Meili Cao ◽  
Haizhen He ◽  
Hairong Lin ◽  
Hao Peng ◽  
Bohui Zhu
Keyword(s):  
Integrated Circuit ◽  
Experimental Tests ◽  
Current Mode ◽  
Third Order ◽  
Order Filter ◽  
Minimal Component ◽  
Low Pass ◽  
Band Pass ◽  
Hp Filter ◽  
High Pass

In this paper, a new active current-mode (CM) minimal component, cascaded current differencing unit (CCDU) and a CM nth-order filter based on the CCDU have been presented. The proposed CCDU simplifies the design of the CM nth-order filter circuit considerably. The proposed nth-order circuit, which adopts only an active component and n grounded capacitors, can simultaneously realize low-pass (LP), band-pass (BP) and high-pass (HP) filter responses. It enjoys the simple configuration and is suitable for integrated circuit (IC) fabrication. PSPICE simulations and experimental tests for CM third-order filter based on this structure have also been conducted and the results have good agreement with the theoretical analysis.

scholarly journals DDCCTA-Based Universal filter and Quadrature Oscillator

2018 ◽  
Vol 3 (2) ◽  
pp. 18-21
Author(s):  
Rashmika Rai ◽  
◽  
S Indu
Keyword(s):  
Integrated Circuit ◽  
Notch Filter ◽  
Pass Band ◽  
Universal Filter ◽  
Passive Components ◽  
Transconductance Amplifier ◽  
Low Pass ◽  
Single Input ◽  
Band Pass ◽  
High Pass

The study presents a universal filter and Oscillator obtain by applying only single input. All the passive components used are grounded which is suitable for integrated circuit implementation. In the circuit by applying for single input simultaneously low pass, High Pass, Band Pass, All Pass, and Notch filter is obtained by using two blocks of Differential Difference current conveyor transconductance amplifier.

Realization of Resistorless and Electronically Tunable Inverse Filters Using VDTA

2019 ◽  
Vol 28 (09) ◽  
pp. 1950143 ◽  
Author(s):  
Praveen Kumar ◽  
Neeta Pandey ◽  
Sajal K. Paul
Keyword(s):  
Cmos Technology ◽  
Angular Frequency ◽  
Pass Band ◽  
Passive Component ◽  
Inverse Filter ◽  
Transconductance Amplifier ◽  
Low Pass ◽  
Band Pass ◽  
Electronically Tunable ◽  
High Pass

This paper presents resistorless realization of inverse filters using voltage differencing transconductance amplifier (VDTA). First, four topologies are proposed which provide inverse low-pass, high-pass, band-pass, and band-reject responses. Subsequently, a unified inverse filter is also derived by incorporating two switches in the combination of proposed inverse low-pass and inverse band-pass topologies. This topology is capable of providing inverse low-pass, inverse high-pass, inverse band-pass, and inverse band-reject responses by appropriate switch settings. The proposed inverse filter structures are electronically tunable and use only grounded capacitors. The behavior of the proposed filters is also investigated for nonidealities. To verify the functionality of the proposed inverse filter circuits, SPICE simulation is carried out using 0.18-[Formula: see text]m CMOS technology parameters from TSMC. The effect of deviation in the active and passive component values on angular frequency is tested through Monte Carlo simulation.

CURRENT-MODE ACTIVE-C FILTER EMPLOYING REDUCED NUMBER OF CCCII+s

2007 ◽  
Vol 16 (04) ◽  
pp. 507-516 ◽  
Author(s):  
SHAHRAM MINAEI ◽  
ERKAN YUCE
Keyword(s):  
Current Mode ◽  
Pass Band ◽  
Passive Component ◽  
Resistorless Filter ◽  
Low Pass ◽  
Component Matching ◽  
Band Pass ◽  
High Output Impedance ◽  
Quality Factor Q ◽  
High Pass

In this paper, a universal current-mode second-order active-C filter for simultaneously realizing low-pass, band-pass and high-pass responses is proposed. The presented filter employs only three plus-type second-generation current-controlled conveyors (CCCII+s). This filter needs no critical active and passive component matching conditions and no additional active and passive elements for realizing high output impedance low-pass, band-pass and high-pass characteristics. The angular resonance frequency (ω0) and quality factor (Q) of the proposed resistorless filter can be tuned electronically. To verify the theoretical analysis and to exhibit the performance of the proposed filter, it is simulated with SPICE program.

NOVEL VOLTAGE-MODE UNIVERSAL FILTER USING ONLY TWO CDBAs

2005 ◽  
Vol 14 (01) ◽  
pp. 159-164 ◽  
Author(s):  
SUDHANSHU MAHESHWARI ◽  
IQBAL A. KHAN
Keyword(s):  
Pass Band ◽  
Universal Filter ◽  
Input Selection ◽  
Voltage Mode ◽  
Single Output ◽  
Control Computer ◽  
Low Pass ◽  
Band Pass ◽  
Pass Through ◽  
High Pass

A novel voltage-mode universal filter employing only two current differencing buffered amplifiers (CDBAs) is proposed. The filter uses four inputs and single output to realize six responses, viz. low-pass, high-pass, inverting band-pass, noninverting band-pass, band-elimination, and all-pass through input selection with independent pole-Q control. Computer simulation results using SPICE are also given to verify the theory.

scholarly journals Design and Implementation of Digital Filters for ECG Data Based on Field Programmable Gate Array and MATLAB

2020 ◽  
pp. 17-19
Author(s):  
Emre Cancioglu ◽  
Gokberk Cakiroglu ◽  
Alkim Gokcen ◽  
Yilmaz Sefa Altanay
Keyword(s):  
Digital Filters ◽  
Pass Band ◽  
System Generator ◽  
Design And Implementation ◽  
Field Programmable ◽  
Low Pass ◽  
Band Pass ◽  
Database Platform ◽  
High Pass ◽  
Ecg Data

This study provides design and implementation of four digital filters (low pass, high pass, band pass and band stop) for ECG (electrocardiogram) data on FPGA with MATLAB by a serial communication. The study is conducted with using ECG data which is obtained from PhysioBank Database platform. SysGen (System Generator for DSP) which is a toolbox for MATLAB is used for designing and implementing the digital filters. The aim of the study is to perform four different digital filters with various blocks on the SysGen Toolbox. The study then examines the results of four different digital filters.

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