Wien-Bridge Sinusoidal Oscillator with Electronic and Amplitude Controllability Using Single Off-the-shelf Integrated Circuit

Abstract The article proposes a design for a Wien-bridge sinusoidal oscillator. The design employs a single commercially available LT1228 integrated circuit (IC), along with four resistors and two capacitors. The proposed oscillator produces a sinusoidal output signal with a variable amplitude while providing the stability of both the oscillation frequency and conditions. No extra active components are necessary to realize this functionality, and the output impedance remains low. Its structure enables independent adjustment of both the oscillation frequency and the oscillation state. Experimental observations confirmed the practicality of the proposed Wien-bridge sinusoidal oscillator. The oscillator exhibited a frequency range that may be linearly adjusted from 16.18 kHz to 157.13 kHz. Due to its simple construction and utilization of off-the-shelf integrated circuit, the proposed oscillator is suitable for use in automation and control systems.