GENERATION OF OSCILLATORS BASED ON GROUNDED CAPACITOR CURRENT CONVEYORS WITH MINIMUM PASSIVE COMPONENTS

2009 ◽  
Vol 18 (05) ◽  
pp. 857-873 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Negative Resistance ◽  
Passive Component ◽  
Current Conveyors ◽  
Spice Simulation ◽  
Feature Size ◽  
Passive Components ◽  
The Family ◽  
Simulation Results ◽  
Inverting Current Conveyors ◽  
Oscillator Circuits

In this paper, eight new Frequency Dependent Negative Resistance (FDNR) circuits using two current conveyors or inverting current conveyors or a combination of the two types are introduced. The proposed circuits are canonic and they use two grounded capacitors and one floating resistor. The generation of grounded capacitor minimum passive component oscillators from the FDNR circuits is also considered. It is found that two of the recently reported attractive oscillators are among the family of the generated oscillator circuits. Additional six new oscillator circuits based on the FDNR circuits are introduced in this paper. Spice simulation results using technology: SCN 05 feature size 0.5 μm, MOSIS Vendor: AGILENT to demonstrate the practicality of the proposed oscillators are included.

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.

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 Voltage-Mode All-Pass Filters Including Minimum Component Count Circuits

2007 ◽  
Vol 2007 ◽  
pp. 1-5 ◽  
Author(s):  
Sudhanshu Maheshwari
Keyword(s):  
Active Element ◽  
Passive Component ◽  
Output Impedance ◽  
Passive Components ◽  
First Order ◽  
Voltage Mode ◽  
Pspice Simulation ◽  
Simulation Results ◽  
A Current

This paper presents two new first-order voltage-mode all-pass filters using a single-current differencing buffered amplifier and four passive components. Each circuit is compatible to a current-controlled current differencing buffered amplifier with only two passive elements, thus resulting in two more circuits, which employ a capacitor, a resistor, and an active element, thus using a minimum of active and passive component counts. The proposed circuits possess low output impedance, and hence can be easily cascaded for voltage-mode systems. PSPICE simulation results are given to confirm the theory.

ACTIVE CIRCULATOR CIRCUITS USING OA, CCII, CFOA AND DVCC

2009 ◽  
Vol 18 (04) ◽  
pp. 629-645 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Detailed Comparison ◽  
Current Conveyor ◽  
Operational Amplifiers ◽  
Current Conveyors ◽  
Spice Simulation ◽  
Current Feedback ◽  
Current Feedback Operational Amplifiers ◽  
Different Types ◽  
Simulation Results ◽  
Differential Voltage Current Conveyor

A review of the two types of circulators using Operational Amplifiers (OA) with detailed comparison is given. Novel active circulator circuits using Current Conveyors (CCII) and Current Feedback Operational Amplifiers (CFOA) and Differential Voltage Current Conveyor (DVCC) are introduced. The proposed CCII circulator circuit uses six CCIIs and three floating resistors. Two different circulator types using the CFOA are given. A circulator circuit which uses three DVCCs and has the advantage of using three grounded resistors is also introduced. Spice simulation results using 0.5 μm CMOS transistors are included to support the theoretical analysis and demonstrate comparisons among the different types of circulators.

FULLY CASCADABLE MIXED-MODE UNIVERSAL FILTER BIQUAD USING DDCCS AND GROUNDED PASSIVE COMPONENTS

2011 ◽  
Vol 20 (04) ◽  
pp. 607-620 ◽  
Author(s):  
CHEN-NONG LEE
Keyword(s):  
Mixed Mode ◽  
Current Conveyors ◽  
Output Impedance ◽  
Universal Filter ◽  
Spice Simulation ◽  
Passive Components ◽  
Current Output ◽  
Current Voltage ◽  
Input Signals ◽  
Analytical Synthesis

A fully cascadable (i.e., low/high input impedance for current/voltage input signals and high/low output impedance for current/voltage output signals) mixed-mode (input and output signals can be voltage or current) universal filter biquad by using three differential difference current conveyors (DDCCs), three grounded resistors, and two grounded capacitors is presented in this paper. The proposed biquad can realize the inverting, non-inverting, and differential types universal filtering responses (lowpass, highpass, bandpass, notch, and allpass) from the voltage and current output terminals without changing the filter topology. The proposed circuit is suitable for cascading in all the four possible modes (i.e., voltage, current, transresistance, and transconductance modes). Moreover, the proposed mixed-mode biquad still enjoys (i) using only grounded passive components, (ii) no need of extra inverting and non-inverting amplifiers for special input signals, and (iii) low active and passive sensitivities. This paper also shows how analytical synthesis can be used to produce the proposed mixed-mode filter circuit. H-Spice simulation results confirm the theory.

ALL GROUNDED PASSIVE ELEMENTS CURRENT-MODE ALL-PASS FILTER

2009 ◽  
Vol 18 (01) ◽  
pp. 31-43 ◽  
Author(s):  
SHAHRAM MINAEI ◽  
ERKAN YUCE
Keyword(s):  
Current Mode ◽  
Current Conveyors ◽  
Output Impedance ◽  
Spice Simulation ◽  
Passive Components ◽  
Pass Filter ◽  
Variable Voltage ◽  
Minimum Number ◽  
High Output Impedance ◽  
High Output

In this paper, a new current-mode (CM) all-pass filter employing two Dual-Output Second-Generation Current Conveyors (DO–CCIIs), one grounded resistor and one grounded capacitor is presented. The proposed circuit exhibits low input impedance and high output impedance, which makes it suitable for cascading. Moreover, adding two extra resistors to the proposed circuit, a new gain-variable voltage-mode (VM) all-pass filter is obtained. A quadrature oscillator employing minimum number of grounded passive components is derived from the developed CM filter as an application of the first-order all-pass filter. Both of the proposed all-pass filters do not require matching of passive components. The effects of the parasitic impedances of the DO–CCIIs on the transfer function (TF) of the proposed CM filter as an example are investigated. In addition, the proposed CM all-pass filter and oscillator circuit are simulated using SPICE simulation program to confirm the theory.

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.

BODE-TYPE EQUALIZERS USING CURRENT CONVEYORS

2009 ◽  
Vol 18 (03) ◽  
pp. 433-442 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Operational Amplifier ◽  
Current Mode ◽  
Current Conveyors ◽  
Spice Simulation ◽  
Voltage Mode ◽  
Type Variable ◽  
Simulation Results

New voltage mode and current mode active RC Bode-type variable equalizers using current conveyors are introduced. The proposed equalizers can operate at much higher frequencies than the classical operational amplifier-based variable equalizers. Spice simulation results are included to confirm the practicality of the proposed circuits.

PATHOLOGICAL REALIZATIONS OF BOTA AND FDDTA USING GROUNDED RESISTORS

2012 ◽  
Vol 21 (03) ◽  
pp. 1250025 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Current Conveyors ◽  
Transconductance Amplifier ◽  
Simulation Results ◽  
Inverting Current Conveyors

Sixteen pathological realizations of the balanced output transconductance amplifier (BOTA) using four grounded G are generated. Each of these circuits is realizable using four current conveyors (CCII) or four inverting current conveyors (ICCII) or a combination of four CCII and ICCII. Six new pathological realizations of the BOTA using two grounded G based on current subtraction are introduced. Four new pathological realizations of the BOTA using two grounded G based on voltage subtraction are introduced. Several new pathological realizations of the FDDTA as a voltage subtraction stage and a BOTA stage are also given. Simulation results are included.

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.

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