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 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 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 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 Realizations of Single OTRA-Based Sinusoidal Oscillators

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Hung-Chun Chien
Keyword(s):  
Oscillation Frequency ◽  
Frequency Stability ◽  
Experimental Results ◽  
Sensitivity Analyses ◽  
Independent Control ◽  
Passive Components ◽  
The Third ◽  
Sinusoidal Oscillators ◽  
Condition Of Oscillation ◽  
Oscillator Circuits

This study proposes three new sinusoidal oscillators based on an operational transresistance amplifier (OTRA). Each of the proposed oscillator circuits consists of one OTRA combined with a few passive components. The first circuit is an OTRA-based minimum RC oscillator. The second circuit is capable of providing independent control on the condition of oscillation without affecting the oscillation frequency. The third circuit exhibits independent control of oscillation frequency through a capacitor. This study first introduces the OTRA and the related formulations of the proposed oscillator circuits, and then discusses the nonideal effects, sensitivity analyses, and frequency stability of the presented circuits. The proposed oscillators exhibit low sensitivities and good frequency stability. Because the presented circuits feature low impedance output, they can be connected directly to the next stage without cascading additional voltage buffers. HSPICE simulations and experimental results confirm the feasibility of the new oscillator circuits.

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.

Research on DEH System Characteristics Effect on Power System Low-Frequency Oscillations

2014 ◽  
Vol 607 ◽  
pp. 542-546
Author(s):  
Feng Ping Pan ◽  
Shu Chang Liu ◽  
Ya Qing Zhu ◽  
Zhi Qiang Pang ◽  
Ling Ling Shi ◽  
...  
Keyword(s):  
Power System ◽  
Frequency Control ◽  
Low Frequency ◽  
Experimental Results ◽  
Production Theory ◽  
Speed Regulation ◽  
Low Frequency Oscillations ◽  
Power Frequency ◽  
The Impact ◽  
System Characteristics

This article analysed the impact of speed regulation and power-frequency control on power system low-frequency oscillations from the perspective of its production theory. From the experimental results, it can be seen that the power-frequency control will make the low-frequency oscillations worse and longer, thus need to be modified in further research.

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