scholarly journals Digitally Programmable Partially Active-R Sinusoidal Oscillators

1994 ◽  
Vol 17 (2) ◽  
pp. 83-89 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Abdulrahman Khalaf Al-Ali ◽  
Sami Saud Buhalim ◽  
Syed Tauseef Ahmed
Keyword(s):  
Operational Amplifier ◽  
Sinusoidal Oscillation ◽  
Sinusoidal Oscillators ◽  
Digitally Programmable ◽  
Sinusoidal Oscillator ◽  
Oscillator Circuits

New, simple sinusoidal oscillator circuits are proposed. Each circuit uses an internally compensated operational amplifier, a resistor, and a capacitor. The feasibility of obtaining digitally programmable sinusoidal oscillation is studied and a new digitally programmable capacitorless resistorless sinusoidal oscillator is developed.

scholarly journals New Grounded-Capacitor Sinusoidal Oscillators Using the Current-Feedback-Amplifier Pole

1998 ◽  
Vol 21 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Muhammad Taher Abuelma’atti ◽  
Husain Abdullah Al-Zaher
Keyword(s):  
Operational Amplifier ◽  
Experimental Results ◽  
Current Feedback ◽  
Sinusoidal Oscillators ◽  
Feedback Amplifier ◽  
Current Feedback Amplifier ◽  
Sinusoidal Oscillator ◽  
Current Feedback Operational Amplifier ◽  
Oscillator Circuits

New current-feedback-operational amplifier (CFOA)-pole-based sinusoidal oscillator circuits are presented. Each circuit uses two CFOAs, two (or three) grounded capacitors and/or resistors. Experimental results are included.

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.

scholarly journals Active-Only Sinusoidal Oscillator Circuits

2001 ◽  
Vol 24 (4) ◽  
pp. 223-232 ◽  
Author(s):  
Muhammad Taher Abuelmaatti ◽  
Muhammad Ali Al-Qahtani
Keyword(s):  
Operational Amplifier ◽  
Current Control ◽  
Current Feedback ◽  
Operational Transconductance Amplifiers ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Transconductance Amplifiers ◽  
Current Feedback Operational Amplifier ◽  
Oscillator Circuits

Two new active-only sinusoidal oscillator circuits are proposed. The first circuit uses one current feedback operational amplifier (CFOA) and four operational transconductance amplifiers (OTAs). The second circuit uses only four OTAs. Without using any external passive elements, voltage (or current) control of the frequency and condition of oscillation, of the two circuits, can be achieved by adjusting the bias currents of the OTAs. The proposed circuits enjoy low sensitivities.

scholarly journals New Minimum-Component OTA-Based Sinusoidal Oscillators

1996 ◽  
Vol 19 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Muhammad Haroon Khan
Keyword(s):  
Experimental Results ◽  
Passive Element ◽  
Operational Transconductance Amplifiers ◽  
Sinusoidal Oscillators ◽  
Transconductance Amplifiers ◽  
Oscillator Circuits

Using a general oscillator structure, new oscillator circuits are systematically derived. These oscillator circuits use two operational transconductance amplifiers (OTAs) and one externally connected passive element, exploiting the inherent zeros of the OTAs to advantage. The feasibility of obtaining oscillation using only two OTAs without externally connected passive elements is investigated. Experimental results are included.

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 Digitally Programmable Integrator and Differentiator

1995 ◽  
Vol 17 (4) ◽  
pp. 261-268
Author(s):  
Abdulrahman Khalaf Al-Ali ◽  
Muhammad Taher Abuelma'atti ◽  
Syed Yunus
Keyword(s):  
Operational Amplifier ◽  
Experimental Results ◽  
Time Constants ◽  
Operational Transconductance Amplifiers ◽  
Digitally Programmable ◽  
Transconductance Amplifiers

Digitally programmable integrator and differentiator circuits are presented. Each circuit uses at most one operational amplifier, two operational transconductance amplifiers, and one capacitor. The time constants of the circuits are decided by the biasing currents of the operational transconductance amplifiers. The circuits can be easily interfaced with microprocessor-based systems. Experimental results are included.

scholarly journals Synthesis of a Novel Low-Component Programmable Sinusoidal Oscillator

2003 ◽  
Vol 26 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Sa'ad Muhammad Al-Shahrani
Keyword(s):  
Excellent Agreement ◽  
Operational Amplifier ◽  
Operational Transconductance Amplifier ◽  
Current Feedback ◽  
Transconductance Amplifier ◽  
Sinusoidal Oscillator ◽  
Current Feedback Operational Amplifier ◽  
Synthesis Approach

A novel circuit is presented for realizing a sinusoidal oscillator. The proposed circuit, developed through a true synthesis approach, uses one current-feedback operational amplifier (CFOA), one operational transconductance amplifier (OTA), three grounded capacitors and one floating resistor. The proposed circuit enjoys several attractive features. Practical results, in excellent agreement with the presented theory, are included.

A novel operational amplifier-based square/triangular/sinusoidal oscillator

2015 ◽  
Vol 52 (3) ◽  
pp. 276-283 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Zainulabideen Jamal Khalifa
Keyword(s):  
Operational Amplifier ◽  
Sinusoidal Oscillator
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