Design guidelines for minimum harmonic distortion in a wien oscillator with automatic amplitude control system

Author

Palumbo, Gaetano ; Pennisi, Melita ; Pennisi, Salvatore

Author_Institution

DIEES - Dipt. di Ing. Elettr., Elettron. e dei Sist., Univ. of Catania, Catania

fYear

2008

fDate

Aug. 31 2008-Sept. 3 2008

Firstpage

1127

Lastpage

1130

Abstract

In sinusoidal oscillators, the nonlinear behavior of the automatic amplitude control mechanism is the main responsible for harmonic distortion. For instance, THD of Wien oscillators with diode-based amplitude control may increase up to 10 dB compared to that of the basic structure. In this paper, THD due to both the operational amplifier and the amplitude stabilization mechanism is analytically evaluated, leading to an optimum design strategy which minimizes distortion. The accuracy and viability of both the proposed analysis and design approach is confirmed experimentally.

Keywords

circuit stability; harmonic distortion; nonlinear network analysis; oscillators; THD; Wien oscillator; amplitude stabilization mechanism; automatic amplitude control system; diode-based amplitude control; minimum harmonic distortion; nonlinear behavior; operational amplifier; sinusoidal oscillators; Automatic control; Bridge circuits; Control systems; Diodes; Frequency; Guidelines; Harmonic distortion; Nonlinear control systems; Operational amplifiers; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on

Conference_Location

St. Julien´s

Print_ISBN

978-1-4244-2181-7

Electronic_ISBN

978-1-4244-2182-4

Type

conf

DOI

10.1109/ICECS.2008.4675056

Filename

4675056