scholarly journals Synthesis of Oscillators Using Limit Variables and NAM Expansion

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
Ahmed M. Soliman
Keyword(s):  
Current Conveyors ◽  
Independent Control ◽  
Passive Element ◽  
Parasitic Element ◽  
Admittance Matrix ◽  
Condition Of Oscillation ◽  
Synthesis Procedure ◽  
Simulation Results ◽  
Published Paper ◽  
Systematic Synthesis

A systematic synthesis procedure for generating second-order grounded passive element canonic oscillators is given. The synthesis procedure is based on using nodal admittance matrix (NAM) expansion with the bracket method as well as using the infinity parameters. The resulting derived oscillators include circuits using various types of current conveyors. Two classes of oscillators are considered in this paper, and they have the advantages of having independent control on the condition of oscillation and on the frequency of oscillation by varying two different grounded resistors. The two classes of oscillators considered can be easily compensated for the parasitic element effects introduced by the current conveyors. This paper is considered to be continuation to the recently published paper on oscillators using NAM expansion D. G. Haigh et al. (2006). This is the first paper in the literature which uses limit-variables called infinity-variables D. G. Haigh et al. (2005) in the synthesis of oscillator circuits. Simulation results demonstrating the practicality of some of the generated circuits are included.

GENERATION OF THIRD-ORDER QUADRATURE OSCILLATOR CIRCUITS USING NAM EXPANSION

2013 ◽  
Vol 22 (07) ◽  
pp. 1350060 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Current Conveyors ◽  
Third Order ◽  
Passive Element ◽  
Op Amp ◽  
Admittance Matrix ◽  
Synthesis Procedure ◽  
Inverting Current Conveyors ◽  
Quadrature Oscillators ◽  
Systematic Synthesis ◽  
Oscillator Circuits

A systematic synthesis procedure for generating third-order grounded passive element quadrature oscillators is given. The synthesis procedure is based on using nodal admittance matrix (NAM) expansion applied to the Y matrix of a recently reported three Op Amp third-order oscillator circuit. Four new circuits using current conveyors (CCII) are reported. In addition four more new circuits using inverting current conveyors (ICCII) are also given. Many more quadrature third-order oscillator circuits using combinations of CCII and ICCII can be obtained. Simulation results demonstrating the practicality of one of the generated circuits are included.

scholarly journals On The Realization of Low/High Frequency CCII+ Based Oscillators Employing Grounded Resistors and Lossy Capacitors

1995 ◽  
Vol 17 (4) ◽  
pp. 269-274 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Muhammad Haroon Khan
Keyword(s):  
High Frequency ◽  
Second Generation ◽  
Current Conveyors ◽  
Independent Control ◽  
Low Frequencies ◽  
Positive Current ◽  
Condition Of Oscillation ◽  
Simulation Results ◽  
Oscillator Circuits

New RC oscillator circuits are presented. Each circuit uses two second-generation positive current-conveyors, three grounded capacitors and four grounded resistors. The circuits enjoy independent control of the frequency and the condition of oscillation and are very attractive for integration. The circuits can realize high and low frequencies of oscillation. Simulation results are included.

scholarly journals Current-Controlled Current-Mode Quadrature Oscillator Using Translinear Current Conveyors

2019 ◽  
Vol 3 (1) ◽  
pp. 29
Author(s):  
Montree Kumngern
Keyword(s):  
Integrated Circuit ◽  
Second Generation ◽  
Current Mode ◽  
Current Conveyors ◽  
Circuit Implementation ◽  
Quadrature Oscillator ◽  
External Bias ◽  
Condition Of Oscillation ◽  
Simulation Results ◽  
A Current

In this paper, a current-mode quadrature oscillator using second-generation current conveyors (CCIIs) is presented. The proposed oscillator consists of two CCIIs, two grounded capacitors and two grounded resistors. The circuit is suitable for integrated circuit implementation by using grounded capacitors. In addition, a new current-controlled current-mode quadrature oscillator using two current controlled second generation current conveyors (CCCIIs) and two grounded capacitors can be obtained by replacing CCIIs and resistors series at X terminals with CCCIIs. The condition of oscillation and frequency of oscillation can be orthogonally controlled. The frequency of oscillation can be controlled by grounded resistors and external bias currents. The proposed circuits have been simulated by SPICE simulations. The simulation results are confirmed the proposed theory.

scholarly journals Two Integrator Loop Filters: Generation Using NAM Expansion and Review

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Ahmed M. Soliman
Keyword(s):  
Synthesis Method ◽  
Current Conveyor ◽  
Equivalent Circuits ◽  
Current Conveyors ◽  
Lowpass Filter ◽  
Admittance Matrix ◽  
Unity Gain ◽  
Differential Voltage Current Conveyor ◽  
Inverting Current Conveyors ◽  
Systematic Synthesis

Systematic synthesis method to generate a family of two integrator loop filters based on nodal admittance matrix (NAM) expansion is given. Eight equivalent circuits are obtained; six of them are new. Each of the generated circuits uses two grounded capacitors and employs two current conveyors (CCII) or two inverting current conveyors (ICCII) or a combination of both. The NAM expansion is also used to generate eight equivalent grounded passive elements two integrator loop filters using differential voltage current conveyor (DVCC); six of them are new. Changing the input port of excitation, two new families of eight unity gain lowpass filter circuits each using two CCII or ICCII or combination of both or two DVCC are obtained.

scholarly journals Novel Current-Conveyor-Based Universal Current-Mode Biquad Filter with Three Inputs and One Output

1998 ◽  
Vol 20 (4) ◽  
pp. 235-240 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Hussain Abdullah Al-Zaher
Keyword(s):  
Second Generation ◽  
Current Mode ◽  
Current Conveyor ◽  
Current Conveyors ◽  
Independent Control ◽  
Biquad Filter

A novel universal current-mode filter with three inputs and one high imedance output is presented. The proposed circuit uses four plus-type second-generation current-conveyors, grounded resistors and grounded capacitors. The proposed circuit enjoys low active and passive sensitivities and independent control of the parametersω0/Q0using grounded resistors.

scholarly journals Active-Only Sinusoidal Oscillator with Electronically-Tunable Fully-Uncoupled Frequency and Condition of Oscillation

2001 ◽  
Vol 24 (4) ◽  
pp. 233-241 ◽  
Author(s):  
Muhammad Taher Abuelmaatti
Keyword(s):  
Second Generation ◽  
Operational Amplifiers ◽  
Current Conveyors ◽  
Oscillator Circuit ◽  
Operational Transconductance Amplifiers ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Transconductance Amplifiers ◽  
Electronically Tunable

A new active-only sinusoidal oscillator is presented. The oscillator circuit uses two internally compensated operational amplifiers, two plus-type second-generation current conveyors and three operational transconductance amplifiers. The proposed circuit enjoys the attractive features of totally uncoupled frequency and condition of oscillation, low sensitivities, electronic tunability and integratability.

HISTORY AND PROGRESS OF THE TOW THOMAS BI-QUADRATIC FILTER PART III: GENERATION USING NAM EXPANSION

2010 ◽  
Vol 19 (03) ◽  
pp. 529-548 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Current Conveyors ◽  
Selectivity Factor ◽  
High Input ◽  
High Input Impedance ◽  
Admittance Matrix ◽  
The Family ◽  
Different Types ◽  
New Generation ◽  
Inverting Current Conveyors ◽  
Very High

A new generation method of the Tow-Thomas (TT) circuit based on the nodal admittance matrix (NAM) expansion is given. The family of TT circuits defined includes four different types of generated circuits. All the advantages of the classical TT circuit namely, independent control on the frequency, selectivity factor Q and gain, besides having very low passive sensitivities are maintained. Besides, each of the family members of the generated circuits use grounded passive elements and has very high input impedance. It is found that there are eight circuits in each type implying a total of 32 TT circuits using current conveyors (CCII) and inverting current conveyors (ICCII). 24 circuits are new and four of them have a floating property.

A New CCII Based Voltage-Mode Multifunctional Filter with Reduced Number of Active and Passive Elements

2015 ◽  
Vol 24 (04) ◽  
pp. 1550047 ◽  
Author(s):  
Firat Yucel ◽  
Erkan Yuce
Keyword(s):  
Time Domain ◽  
Input Impedance ◽  
Current Conveyors ◽  
High Input ◽  
High Input Impedance ◽  
Voltage Mode ◽  
Low Pass ◽  
Band Pass ◽  
Simulation Results ◽  
High Pass

In this paper, a new voltage-mode (VM) multifunctional filter comprising two second-generation current conveyors (CCIIs) is proposed. The proposed filter with one input and three outputs is also composed of three resistors and two grounded capacitors. The proposed filter has high input impedance; thus, it can be easily connected with other VM circuits. The proposed filter can simultaneously provide low-pass (LP), band-pass (BP) and high-pass (HP) responses. A number of time domain and frequency domain simulation results are included to confirm the claimed theory.

NEW REALIZATIONS OF VOLTAGE-MODE QUADRATURE OSCILLATORS USING CURRENT DIFFERENCING BUFFERED AMPLIFIERS

2010 ◽  
Vol 19 (05) ◽  
pp. 1069-1076 ◽  
Author(s):  
ABHIRUP LAHIRI
Keyword(s):  
Point Of View ◽  
Passive Components ◽  
Voltage Mode ◽  
Sinusoidal Oscillators ◽  
Integration Point ◽  
Condition Of Oscillation ◽  
Simulation Results ◽  
Quadrature Oscillators

A number of sinusoidal oscillators using current differencing buffered amplifiers (CDBAs) have been reported in the literature. However, only three of them are canonic quadrature oscillators (i.e., requiring two capacitors). The aim of this letter is to present additional realizations of single/dual-resistance-controlled quadrature oscillators using CDBAs. Four voltage-mode quadrature oscillators are proposed, which provide the following advantageous features: (i) use of reduced and canonic component count, viz. two CDBAs, three/four resistors and two capacitors, (ii) all passive components are grounded or virtually grounded, which is favorable from integration point of view and (iii) independent and non-interactive resistor control of the condition of oscillation (CO) and the frequency of oscillation (FO). Simulation results verifying the workability of the proposed circuits have been included.

SYSTEMATIC SYNTHESIS OF OTA-BASED T-T FILTERS USING NAME METHOD

2013 ◽  
Vol 22 (03) ◽  
pp. 1350002 ◽  
Author(s):  
YONG-AN LI
Keyword(s):  
Class Ii ◽  
Class I ◽  
Number Of Components ◽  
Simulation Results ◽  
Systematic Synthesis

According to the terminal relations of the DO-OTA, eight nullor–mirror models for the DO-OTA are presented in this paper, Moreover, the NAME method for two different classes of T-T filters is considered. The class I filters, employing three SISO-OTAs, have 16 different forms, and the class II filters, employing one SISO-OTA and one DISO-OTA or one SIDO-OTA, have eight different forms. Due to use of canonic number of components, the circuits are easy to be integrated and their parameters can be tuned electronically through tuning bias currents of the OTAs. The MULTISIM simulation results have been included to verify the workability of the derived circuit.

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