3 by 3 coupler demodulation algorithm three signals are what role

In the microwave system, often need a microwave power proportionally divided into several ways, this is the power distribution problem. The realization of this function is called power distribution components that is the coupler, mainly including: directional coupler, power splitter and a variety of microwave branching devices.

Photocoupler is a light-mediated transmission of electrical signals, an electric-optical-electrical conversion device. It consists of a light source and light receiver two parts. The light source and light receiver assembled in the same closed shell, separated from each other by a transparent insulator. The pin of the light source for the input, the pin of the light receiver for the output, the common light source for the light-emitting diode, the light receiver for the photosensitive diode, photosensitive transistor and so on. Photocoupler types are more common photodiode type, phototransistor type, photoresistor type, photocontrol thyristor type, photoelectric Darlington type, integrated circuits and so on. The following figure 1 (the shape of the metal round shell package, plastic double in-line plug, etc.).