This high-low-high-low feedback circuit gives us a basic oscillator, only there’s a couple more nuances we’ll need to look into. Hysteresis is just Greek for: state dependence. In our ...

Enter the oven controlled crystal oscillator, or OCXO ... the crystal’s metal case to measure its temperature and provide feedback to the heating circuit. The ICs on the PCB are hard to identify ...

This feedback loop can generate self-sustained ... the modulator — a configuration known as the coupled optoelectronic oscillator. Researchers in a number of groups around the world have ...