scholarly journals New CFOA-Based Grounded-Capacitor Single-Element-Controlled Sinusoidal Oscillator

1997 ◽  
Vol 20 (2) ◽  
pp. 119-124 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Sa'ad Muhammad Al-Shahrani
Keyword(s):  
Experimental Results ◽  
Single Element ◽  
Oscillator Circuit ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation

A new grounded-capacitor single-element-controlled CFOA-based sinusoidal oscillator circuit is presented. The circuit exploits to advantage the internal pole of a general CFOA and uses externally connected three resistors and two grounded capacitors. The frequency of oscillation and the condition of oscillation of the proposed circuit can be independently controlled. Experimental results are included.

An Emitter Follower Sinusoidal Oscillator Circuit

1995 ◽  
Vol 32 (3) ◽  
pp. 265-272
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Experimental Results ◽  
Oscillator Circuit ◽  
Emitter Follower ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation

An emitter follower sinusoidal oscillator circuit An emitter-follower oscillator circuit is analysed. Expressions for the frequency of oscillation and the condition of oscillation are obtained. Experimental results which confirm the theory are presented.

scholarly journals New Single-Resistor Controlled Sinusoidal Oscillator Circuit Using Unity-Gain Current Followers

1997 ◽  
Vol 20 (2) ◽  
pp. 105-109 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Hassan Al-Daghreer
Keyword(s):  
Experimental Results ◽  
Independent Control ◽  
Oscillator Circuit ◽  
Sinusoidal Oscillator ◽  
Current Follower ◽  
Condition Of Oscillation ◽  
Unity Gain

A new configuration for realizing current-follower-based sinusoidal oscillator is presented. The circuit uses two unity-gain current followers, three capacitors, and three resistors, and enjoys independent control of its frequency and condition of oscillation. Experimental results are included.

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.

scholarly journals Electronically Tunable Quadrature Sinusoidal Oscillator with Equal Output Amplitudes during Frequency Tuning Process

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Den Satipar ◽  
Pattana Intani ◽  
Winai Jaikla
Keyword(s):  
Frequency Tuning ◽  
Digital Circuit ◽  
Bias Current ◽  
Experimental Results ◽  
Current Conveyors ◽  
Active Device ◽  
Output Terminal ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Electronically Tunable

A new configuration of voltage-mode quadrature sinusoidal oscillator is proposed. The proposed oscillator employs two voltage differencing current conveyors (VDCCs), two resistors, and two grounded capacitors. In this design, the use of multiple/dual output terminal active building block is not required. The tuning of frequency of oscillation (FO) can be done electronically by adjusting the bias current of active device without affecting condition of oscillation (CO). The electronic tuning can be done by controlling the bias current using a digital circuit. The amplitude of two sinusoidal outputs is equal when the frequency of oscillation is tuned. This makes the sinusoidal output voltages meet good total harmonic distortions (THD). Moreover, the proposed circuit can provide the sinusoidal output current with high impedance which is connected to external load or to another circuit without the use of buffer device. To confirm that the oscillator can generate the quadrature sinusoidal output signal, the experimental results using VDCC constructed from commercially available ICs are also included. The experimental results agree well with theoretical anticipation.

scholarly journals New Electronically-Tunable Oscillator Circuit Using Only Two OTAs

1998 ◽  
Vol 20 (4) ◽  
pp. 189-194 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Muhammad Haroon Khan
Keyword(s):  
Experimental Results ◽  
Independent Control ◽  
Oscillator Circuit ◽  
Operational Transconductance Amplifiers ◽  
Condition Of Oscillation ◽  
Transconductance Amplifiers ◽  
Electronically Tunable ◽  
Tunable Oscillator

New oscillator circuit using two operational transconductance amplifiers and grounded capacitors is presented. The oscillator circuit enjoys independent control of the frequency and the condition of oscillation. Experimental results confirming the presented theory are included.

Dual-Mode Quadrature Oscillator Using Current Follower Transconductance Amplifiers for GMI Sensors

2013 ◽  
Vol 712-715 ◽  
pp. 1886-1890
Author(s):  
Lei Zhang ◽  
Zhong Ming Pan
Keyword(s):  
Dual Mode ◽  
Transconductance Amplifier ◽  
Current Voltage ◽  
Sinusoidal Oscillator ◽  
Current Follower ◽  
Condition Of Oscillation ◽  
Transconductance Amplifiers ◽  
Passive Sensitivity ◽  
Quadrature Oscillators ◽  
Circuit Configuration

For designing GMI sensors, realization of current/voltage-mode (dual-mode) quadrature sinusoidal oscillator with the employment of current follower transconductance amplifier (CFTA) as the active component is presented. The proposed circuit configuration comprising two CFTAs, one grounded resistor and two grounded capacitors can simultaneously provide two explicit quadrature output currents and two quadrature output voltages. Moreover, the proposed circuit topology enjoys the advantage of independent control of the condition of oscillation and frequency of oscillation and good active and passive sensitivity performances. The functionality of the proposed quadrature oscillators has been verified by PSPICE simulations.

scholarly journals A Minimum Component Grounded-Capacitor CFOA-Based RC Oscillator

1997 ◽  
Vol 19 (4) ◽  
pp. 247-251 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Sa'ad Muhammad Al-Shahrani
Keyword(s):  
Operational Amplifier ◽  
Single Frequency ◽  
Current Feedback ◽  
Oscillator Circuit ◽  
Sinusoidal Oscillator ◽  
Passive Sensitivity ◽  
Current Feedback Operational Amplifier

A minimum-component grounded-capacitor single-frequency RC-sinusoidal oscillator circuit using the current feedback operational amplifier (CFOA) is presented. The circuit uses a single CFOA, two resistors, and two grounded capacitors. The circuit enjoys low active and passive sensitivity characteristics.

scholarly journals Partially Active-R Grounded-Capacitor CFOA-Based Sinusoidal Oscillators

1996 ◽  
Vol 19 (2) ◽  
pp. 105-109 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Muhammad Haroon Khan
Keyword(s):  
Frequency Control ◽  
Experimental Results ◽  
Sinusoidal Oscillators ◽  
Sinusoidal Oscillator ◽  
Oscillator Circuits

New grounded-capacitor CFOA-based sinusoidal oscillator circuits with independent frequency control are presented. Experimental results are included.

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