Modulation of phase, amplitude or polarization can all be ... a configuration known as the coupled optoelectronic oscillator. Researchers in a number of groups around the world have demonstrated ...

This oscillator not only provides quadrature outputs but also allows for arbitrary phase shift generation and amplitude modulation. The design is robust against variations in component tolerances ...

At the most basic level, AM radio works by generating a carrier wave with an oscillator, and then modulating the amplitude with an audio signal. Around these parts, the venerable 555 timer is ...