SU921085A1 - Magnetic transistorized switch - Google Patents

Description

(54) MAGNETIC TRANSISTOR KEY

The invention relates to a pulse technique and can be used, in particular, as power switches for creating various switching devices and pulse generation. Known magnetic transistor switch containing power and auxiliary transistors and current transformer joint venture. However, the known device does not differ in sufficiently high dynamic characteristics, since the degree of saturation of the power transformer changes due to the measurement of the load; that affects time parameters. The closest to the invention to the technical essence is a magnet-transistor switch containing a power and auxiliary transistors and a current transformer, the primary winding of which is connected in series to the collector circuit of the power transistor, the secondary counter-primary between the collectors of the power and auxiliary transistors, the base of the auxiliary transistor through the source of control pulses connected to the emitter of the power transistor, the base of which is connected to the emitter of the auxiliary transistor ra, additional transformer winding, diode and resistor 21. The purpose of the invention is to improve the dynamic characteristics. To achieve this goal in a magnetic transistor switch containing power and auxiliary transistors and. the current transformer, the primary winding of which is connected afterwards B the collector circuit of the power transistor, the secondary counter-primary between the collectors of the power and auxiliary trap: tori, the base of the auxiliary rpnu-uii-torus is connected to the emitter of the power transistor, the base of which is connected with the emitter of the auxiliary transistor, an additional winding, a diode and a resistor, an additional transistor, and a diode, are introduced. and the additional winding trans. the current format is connected to one end of the auxiliary transistor collector in accordance with the coil, the other through a diode to the auxiliary transistor collector, the emitter of which is connected to the collector of the power transistor, and the base through an additional diode to the base of the auxiliary transistor and through a resistor to the collector of the power transistor . The drawing shows a circuit diagram of the proposed device. Transistor switch contains OS. Novry 1 and auxiliary 2 tfanaistory, current transformer Z. with primary 4, secondary 5 and additional 6 windings. The input (of the composite transistor 7 is connected via a resistor 8 to the control signal source 9. The additional transistor 10 and the first diode 11 form a closed loop with the windings 5 and 6 of the transformer 3. The bases of the transistors 10 and 2 are connected via the second diode 12. Resistor 13 provides switching conditions transistor 10, and diode 14 voltage protection on the windings of current transformer 3 when transistors 1 and 2 are turned on. The transistor switch is connected to an external circuit; it is connected with terminals 15 and 16. When voltage is present at the output 9 polo In terms of polarity, transistors 2 and 1 turn on with and through the collector circuit of component transistor 7, the current flows in the direction indicated by the arrow. This current, flowing through the primary winding 4 of the current transformer 3, provides through winding 5 and the auxiliary transistor.2 the saturation mode transistor 1, in this case, if transistor 10 is turned on, then the saturation depth of transistor 1 is determined by the ratio of the transform ratio between windings 5 and 4 and the actual gain of transistor 1 in a particular mode. Depth on the base of transistor 1 is fic; It is associated with a voltage measurement at the base-collector junction, which, compared to the base-emitter junction voltage of transistor 2, is compared to the sum of the voltage drops on the diode 12 and the emitter junction of transistor 10, the current flow in the circuit: base-collector junction of transistor 1, emitter-base junction of transistor 2I diode 12, base-emitter junction of transistor 10, causes unlocking of transistor 10 and current flow along the circuit: winding, 5, winding 6, diode 11, transistor 10. Current ollektora transistor 10 is subtracted from the current winding 5, pos blunt-transistor in one base stabilizing last nasptseni depth. Additional winding 6 is necessary to compensate for the initial voltage drop across the diode 11 and the transistor 10. Thus, the introduction of an additional key, diodes and additional windings into the transistor switch circuit stabilizes its saturation depth and thereby improves its dynamic characteristics, which allows its in a wide range of switching frequencies. Magnetic transistor switch containing power and auxiliary transistors and a current transformer, the primary winding of which is connected in series with the collector circuit of the power transistor, secondary to the primary between the collectors of the power and auxiliary transistors, the base of the additional transistor is connected to the emitter through the sources of control pulses power transformer, the base of which is connected to the emitter of the auxiliary transistor, additional winding, diode and resis The torus is distinguished by the fact that, in order to improve the dynamic characteristics, an additional transistor and a diode are inserted into the key, with the additional winding of the ipaHformazary Current connected to one output collector of the auxiliary transistor according to the secondary winding

with the collector of the additional transistor, the emitter of which is connected to the collector of the power transistor, and the base through the additional, diode - with the base of the auxiliary transistor and through a resistor - with the collector of the power transistor.

Sources of information taken into account in the examination

,one. USSR Author's Certificate No. 318462, cl. H 03 K 17/60, 1969.

2. USSR author's certificate 222462, cl. H 03 K 6/02, 196 (prototype).

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Claims (1)

Claim A magnetic transistor switch containing a power auxiliary transistor and a current transformer, the primary winding of which is connected in series to the collector circuit of the power transistor, the secondary one is opposite the primary between the collectors of the power and auxiliary transistors, the base of the additional transistor is connected to the emitter of the power transformer through the sources of control pulses, the base which is connected to the emitter of the auxiliary transistor, an additional winding, a diode and a resistor, which is characterized in that , in order to improve the dynamic characteristics, an additional transistor and a diode are introduced into the key, the additional winding of the current transformer connected to one collector of the auxiliary transistor in accordance with the secondary winding, and the other through a diode to the collector of the additional transistor, the emitter of which is connected to the collector of the power transistor, . and the base through an additional diode - with the base of the auxiliary transistor and through the resistor * with the collector of the power transistor. 921085 6.