SU391706A1 - VOLTAGE TRANSFORMER - Google Patents

Description

one

The invention relates to radio engineering and can be used as a source of overvoltage for radio engineering and electrical devices for various purposes.

The known direct-current voltage converters, which contain a self-excited multivibrator on transistors, a source of direct voltage, diode-capacitor multiplication circuits and an output capacitor, have a small load capacity.

The purpose of the invention is to increase the load capacity of the converter.

This is achieved by the fact that the diode-capacitor multiplication value, made up of a series of parallel stages of series-connected diodes and capacitors, is connected between the output of the multivibrator and the collector power supply bus, and the output capacitor is connected to the common point of the diode and capacitor The last stage of the multiplication circuit is the voltage, and the other conclusion is to the common power rail.

The scheme of the proposed Converter shown in the drawing.

The converter contains transistors / and 2, time specifying capacitors 3 and 4, collector resistor 5, base resistors 6 and 7, the voltage multiplying circuit included in

the right shoulder of the multivibrator instead of the collector resistor of the transistor 2. The voltage multiplying circuit consists of storage capacitors 8-11, switching diodes 12-18, switched transistors 19-22 with base resistors 23-26 and an output capacitor 27 connected through diode 28. For accelerating the process of opening transistors 19-22 parallel to the base resistors 23-26 include capacitors 29-32. Parallel to the capacitor 27 is a load 33. The transistor 19 performs the function of a collector resistor for the main transistor 2 of the multivibrator. The transistor 5 of the transistor / can also be replaced by a switched transistor.

When the supply voltage E is applied to the proposed converter, the multivibrator enters a self-oscillation mode, and its transistors 1 and 2 alternately open and close. During the half-life of the multivibrator, when the transistor 2 is open and the transistors are closed and 19-22, the capacitors 8-11 through the diodes and the open transistor 2 are charged before the voltage of the power source. In the next half period of operation of the multivibrator, transistor 2 closes and the transistor / opens. Simultaneously with the transistor / open transistors 19-22 due to the flow of part of the collector current of the transistor / on the basic circuits of transistors