SU128951A1 - Full-wave multivibrator - Google Patents

Description

Full-wave multivibrators are known on semi-aqueous triodes and ferromagnetic elements. In KOTojUiix, the repetition frequency of the pulse-trapping frequency is produced by biasing the core of the output transformer with a rectangular hysteresis loop. The disadvantages of such multivibrators consist in the large weight and dimensions of the ferromagnetic elements and in 1 opportunity11 to use as a load the same-sided straighten, 1i.

In the described My.1V-vibrator, these deficiencies are eliminated by 15klk, by controlling the controllers with bias in the circuit back to the connection of each triode.

The scheme of the described multivibrator is shown in the drawing.

In the absence of current in the windings of chokes 1 p 2 with magnetization. the semiconductor triodes 3} i 4 connected in the feedback circuit, triode 3 goes into saturation mode, and triode 4 is locked. After switching, the magnitude of the magnetic flux in the core of the transformer 5 and in the heart begins to change, and if the chokes 3 and 4 of the feedback circuit of triodes 3 and 4 appear in the terminals of the windings 5 and 7, they support the triode 3 saturation and triode 4-locked. This state continues as long as the mating flux changes. As soon as the cores of the chokes 1 and 2 reach saturation, neoiCMiochenie triodes 3 and 4 occur, then the process repeats. Controlling the magnitude of the magnetizing current flowing through the chokes / and 2. You can adjust the pulse repetition rate.

Since the fouikia of switching triodes using elemetosis with a rectangular hysteresis loop are transferred from the VAYING circuit to the feedback circuit, the output of the trap of the high frequency and the bridge are smaller

weight and dimensions. In addition, the insertion of a control throttle with magnetization into the triode feedback circuit ensures that the multivibrator operates on any load, since this eliminates the need for current flow in the load circuit in both the forward and backward directions. )

Subject invention

Dual-wavelength multivibra) on semiconductor j-phases and ferromagnetic elements with a rectangular net htresis and adjustable pulse repetition rate, characterized in that, to ensure the multivibrator operation for any load and reduce weight and gab;) ntov ferromagnetic elements, The adjustable choke with magnetic bias is connected to the feedback circuit of each triode.