Transformation of oscillators using Op Amps, unity gain cells and CFOA

The realization of two integrator loop oscillators using Operational Amplifiers (Op Amps) is reviewed and a new additional circuit to provide independent control on the oscillation condition is proposed. Four new grounded capacitor oscillator circuits using unity gain cells and having independent co...

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Bibliographic Details
Published inAnalog integrated circuits and signal processing Vol. 65; no. 1; pp. 105 - 114
Main Author Soliman, Ahmed M.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.10.2010
Subjects
Amplification
Circuits
Circuits and Systems
Electrical Engineering
Engineering
Gain
Integrators
Mathematical analysis
Operational amplifiers
Oscillations
Oscillators
Signal,Image and Speech Processing
Unity gain cells
Two integrator loop oscillators
Op Amp
Current feedback operational amplifier (CFOA)
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ISSN0925-1030
1573-1979
DOI10.1007/s10470-010-9458-8

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Summary:The realization of two integrator loop oscillators using Operational Amplifiers (Op Amps) is reviewed and a new additional circuit to provide independent control on the oscillation condition is proposed. Four new grounded capacitor oscillator circuits using unity gain cells and having independent control on the condition of oscillation and on the frequency of oscillation are introduced. The link between the Op Amp based two integrator loop oscillators and three Current Feedback Operational Amplifier (CFOA) based oscillators is detected and clearly explained. This paper serves also as a tutorial paper in introducing the subject of second order two integrator loop oscillators using state variable matrix equation and Nodal Admittance Matrix (NAM) equation.
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ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-010-9458-8