New CFOA-Based Single-Element-Controlled Sinusoidal Oscillators

• Published in: IEEE transactions on instrumentation and measurement Vol. 55; no. 6; pp. 2014 - 2021
• Main Authors: Bhaskar, D.R., Senani, R.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2006; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Biomedical measurements; Capacitance measurement; Capacitors; Circuits; Current-feedback operational amplifiers (CFOAs); Expansion; Frequency; Instrumentation; Instrumentation and measurement; Operational amplifiers; Oscillators; Resistors; sinusoidal oscillators; System testing; Very low frequencies; Voltage-controlled oscillators; voltage-controlled oscillators (VCOs); Workability
• ISSN: 0018-9456; 1557-9662
• DOI: 10.1109/TIM.2006.884139

New single-element-controlled sinusoidal oscillator (SECO) circuits using only two current-feedback operational amplifiers (CFOAs) and only five passive elements [two/three grounded capacitors (GC) and three/two resistors] are presented, which not only enlarge the previously known class of two-CFOA-GC SECOs but also provide new configurations that possess properties not available in the previously known circuits. The new oscillators are useful from the viewpoint of applications in several instrumentation and measurement situations such as oscillator-based capacitance measurement schemes, realization of very low frequency oscillators, and the design of voltage-controlled oscillators. Experimental results based upon commercially available AD844-type CFOAs are included, which confirm the practical workability of the new oscillator configurations