Various embodiments of systems for transmitting and receiving digital and Various embodiments of systems for transmitting and receiving digital and/or analog signals across a single isolator, solid state lighting systems, or DC/DC converter feedback regulation control systems are disclosed. In one embodiment, the digital and analog signals may be modulated into a frequency modulated signal, and each pulse of the frequency modulated signal may be further encoded into a major pulse and a minor pulse. At least some of the circuits, systems and methods disclosed herein may be implemented using conventional CMOS design and manufacturing techniques and processes to provide, for example, a single integrated circuit or ASIC.