Date Published: May 31, 2021 Last Modified: May 31, 2021
• Added equations/proofs involving the Wien bridge oscillator.

• Added schematics and simulation results for a JFET gain-limited Wien bridge oscillator.
• Added info on noise power spectral density and noise amplitude spectral density. Added more info about thermal (Johnson-Nyquist) noise including equations and a worked example involving a $$10k\Omega$$ resistor.
• Added graphs of a simple moving average (SMA) filter’s frequency response.