the devices being unijunction transistors (H03K3/352 takes precedence)

Full Title

Circuits for generating electric pulses; Monostable, bistable or multistable circuits (H03K4/00 takes precedence; for digital function generators in computers G06F1/02) > Generators characterised by the type of circuit or by the means used for producing pulses (H03K3/64 - H03K3/84 take precedence) > by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region (H03K3/023, H03K3/027 take precedence) > the devices being unijunction transistors (H03K3/352 takes precedence)