Electronic switch with on/off fading

An electronic switch with on/off fading comprising:

• a main circuit including a rectifying bridge circuit and a thyristor,
• a thyristor triggering circuit having a trigger pulse integrator which includes a series branch of a first diode and a first capacitor, said trigger pulse integrator is connected between the anode and the control terminal of the thyristor,
• a control branch formed by a parallel network consisting of a first resistor and a second capacitor connected in parallel,
• a fast--discharging synchronic integrator, connected between the anode and cathode of the thyristor and comprising a sample circuit formed by second and third resistors, a integrating circuit consisting of the second resistor, a second diode, and a third capacitor, and a fast--discharging circuit formed by multiple transistors
• a single pole, double throw switch with two contacts, an on contact connected to the parallel network and an off contact, wherein when said single pole, double throw switch is connected to the off contact, the control and cathode of the thyristor are serially connected with a fourth resistor, and
• wherein one side of the first capacitor of the trigger pulse integrator is connected to the control terminal of the thyristor and wherein said series branch is connected between the positive side of the third capacitor in the synchronic integrator and the control terminal of the thyristor.