he output of the coupler is the phototransistor. The basic parameters of interest are the collector current IC and collector emitter voltage, VCE. Figure 3 is a curve of VCE(sat) versus IC for two different drive levels
he output of the coupler is the phototransistor. The basicparameters of interest are the collector current IC and collectoremitter voltage, VCE. Figure 3 is a curve of VCE(sat) versus ICfor two different drive levels