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 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.

scholarly journals One-Input Three-Output Current-Mode Universal Filter Using Translinear Current Conveyors

2019 ◽  
Vol 2 (4) ◽  
pp. 101
Author(s):  
Montree Kumngern
Keyword(s):  
Current Mode ◽  
Pass Band ◽  
Current Conveyors ◽  
Current Response ◽  
Universal Filter ◽  
Low Pass ◽  
Band Pass ◽  
Active Matching ◽  
High Output Impedance ◽  
High Pass

This paper presents a new current-mode universal filter with one-input three-output employing three translinear current conveyors and two grounded capacitors. The proposed filter provides low-pass, band-pass, high-pass current response with high output impedance output which can be directly connected for current-mode circuit. The band-pass and all-pass filters can also be obtained. The parameters wo and Q can be controlled separately and electronically by the bias currents of current conveyors. For realizing all filtering functions, no passive and active matching conditions are required. The active and passive sensitivities are low. The characteristic of the proposed circuit can be confirmed by SPICE simulations.

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.

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.

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.

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.

A New DVCC+ Based Second-Order Current-Mode Universal Filter Consisting of Only Grounded Capacitors

2017 ◽  
Vol 26 (09) ◽  
pp. 1750130 ◽  
Author(s):  
Ahmet Abaci ◽  
Erkan Yuce
Keyword(s):  
Notch Filter ◽  
Current Mode ◽  
Second Order ◽  
Pass Band ◽  
Current Conveyors ◽  
Universal Filter ◽  
Pass Filter ◽  
Low Pass ◽  
Band Pass ◽  
High Output Impedance

In this paper, a new second-order current-mode universal filter using only two plus-type differential voltage current conveyors, three resistors and two grounded capacitors is proposed. The proposed circuit with two identical inputs and three outputs can simultaneously provide second-order high output impedance low-pass, band-pass and notch filter responses. Also, it can realize high-pass and all-pass filter responses with interconnection of relevant output currents. It can be easily tuned electronically. It can be operated properly at high frequencies. A number of simulations based on SPICE program and an experimental test are achieved in order to demonstrate the performance of the proposed filter.

A New Versatile Universal Biquad Configuration for Emerging Signal Processing Applications

2018 ◽  
Vol 27 (12) ◽  
pp. 1850196 ◽  
Author(s):  
Bhartendu Chaturvedi ◽  
Jitendra Mohan ◽  
Atul Kumar
Keyword(s):  
Second Generation ◽  
Current Mode ◽  
Pass Band ◽  
Current Conveyors ◽  
Fully Differential ◽  
Input Matching ◽  
Low Pass ◽  
Single Input ◽  
Band Pass ◽  
High Pass

The paper introduces a new versatile universal biquadratic configuration based on two fully differential second generation current conveyors without need of input matching conditions. The proposed circuit consists of two fully differential second generation current conveyors, four resistors and two grounded capacitors. The proposed biquad configuration provides all five standard filtering responses: low-pass, high-pass, band-pass, band-reject and all-pass in voltage-mode, transadmittance-mode, current-mode and transimpedance-mode. The proposed circuit is single-input multiple-outputs type, so all responses are available simultaneously. Moreover, extra inverting amplifier and double-type amplifier are also not required in the proposed circuit for any filtering response. The nonideal and parasitic effects of fully differential second generation current conveyor on the proposed circuit have also been investigated. HSPICE simulation results have been incorporated to validate the proposal.

ELECTRONICALLY TUNABLE CURRENT-MODE UNIVERSAL BIQUAD FILTER USING DUAL-X CURRENT CONVEYORS

2009 ◽  
Vol 18 (04) ◽  
pp. 665-680 ◽  
Author(s):  
SHAHRAM MINAEI
Keyword(s):  
Current Mode ◽  
Current Conveyors ◽  
Biquad Filter ◽  
Low Pass ◽  
Band Pass ◽  
High Output Impedance ◽  
Electronically Tunable ◽  
High Pass ◽  
Theoretical Analyses ◽  
High Output

In this paper, an electronically tunable current-mode (CM) universal biquad filter is proposed. The proposed filter employs three dual-X second-generation current conveyors (DXCCIIs), two grounded capacitors and four NMOS transistors acting as resistors. The proposed filter simultaneously realizes standard filter functions such as low-pass (LP), band-pass (BP), and high-pass (HP) responses. The notch (NH) and all-pass (AP) functions can also be obtained by connecting appropriate output currents directly without using additional active elements. The output signals are obtained at high output impedance terminals, which is important for easy cascading in CM operation. SPICE simulation results are given to verify the theoretical analyses.

Sign in / Sign up

Export Citation Format

Share Document