DIODE APPLICATIONS

The conversion of the variable currents in continuous only expresses one of the many tasks entrusted to the semiconductor diode valves. Even if this remains the more important in any case than all. In fact, beyond that the rectification, with the diode valves comes true the operation tosatura of a type or of both the semiwaves that compose marks them alternated, of lowland, average or vhf. Always with the diode valves, proteggono some circuits or dispositi electrical workers to you from the dangers of the extratensions: transistors, integrated, various instruments of measure and, expensive equipment. Or commutators are made up of electronic type, here where those mechanics, for reasons of space or impediment of escapes of energy to radio frequency, cannot be use you. But, above all, with the diode valves that famous wireless process is completed, that it takes to the name of detection of the radio waves and that, also being similar to that head physician of the ectification of marks them variable, comes employed in all the apparatuses receivers, with the scope to block, in a sure measure, those if gnali that only serve to the transport, through the space, of the messages composed from voices and sounds.

It is already capitato, in some plans introduces to you in the passed time, to realize that operation electronic that is called tosatura of marks them and for which the phenomenon of unilateral conduction of the diode valves is taken advantage of. As an example, when it needs a tosatura of the negative semiwaves of marks them alternated, also to radio frequency, the circuit brought back in figure 1 is used.

Fig. 1 - A semiconductor diode valve, connected in the way indicated in the outline, parallel with the entrance and of marks them alternated, cortocircuita the negative semiwaves partially, determining the phenomenon of tosatura of these.