This is an application note that introduces a programmable Wien-bridge oscillator circuit using AD8510 and AD5232/AD5231. The circuit can generate accurate sine waves from 10k to 200kHz.
The document details the design of a diode-stabilized Wien-bridge oscillator capable of generating accurate sine waves from 10 kHz to 200 kHz. The core innovation involves using digital potentiometers (specifically AD5232) to program the resistance values, allowing for independent adjustment of oscillation frequency and amplitude.
The circuit is designed to generate accurate sine waves from 10 k to 200 kHz.
By changing the resistance setting, the amplitude can be adjusted from +0.6 V to +2.3 V.
At a frequency of 200 kHz, the error becomes 6%.