Sinusoidal signal can be generated with the wave DAC and low pass filter. But here we will attempt to generate sine wave the analog way. We will use a servo loop to stabilize the adjustable amplitude.
As a warm-up, we will try the simple classic Wien bridge oscillator using one PSoC opamp and a miniature light bulb. The bulb has a resistance of 67 Ohms cold and 170 Ohms at 6mA. It produces a nice sine signal.
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