SU1285566A1 - Square-wave generator - Google Patents

Abstract

The invention relates to a pulse technique, in particular to a pulse shaper. Pel invented the efficiency increase of the device. The generator contains a push-pull power amplifier in transistors 1 and 2 with a transformer 3, having an output winding 4 and a counting trigger 5, the introduction of a threshold device 9, a rectifier 8, a current sensor 7 and the equipment of the transformer 3 with an additional winding 6 eliminates the asymmetric mode of the transformer reversal . The proposed generator provides with powerful pulses any radio devices with a utilization rate of transformer 3 and transistors 1 and 2 close to unity. 2 Il. (L with ca 00 ate O1 O) a

Description

figure 1

one

The invention relates to a pulse technique, in particular to a pulse shaper, and can be used in various radio engineering devices.

The purpose of the invention is to increase efficiency by eliminating the asymmetric mode of magnetization reversal of the transformer.

Fig. 1 is a schematic diagram of a generator of rectangular pulses; figure 2 - plot induction transformer.

1 generator contains two-stroke; power amplifier transistors 1 and 2 with a transformer 3 having an output winding 4, a counting trigger 5, the outputs of which are connected to the input of a push-pull power amplifier. The additional winding 6 placed on the transformer core orthogonally main is connected to the output winding 4 via a current sensor 7 connected to the input of the counting trigger 5 via a rectifier 8 and a threshold device 9.

The device works as follows.

; When the generator is connected to a constant voltage source, one of the transistors I (2) opens (due to the unambiguous position of the inputs of the counting trigger 5) and through the winding of the transformer 3 a current begins to flow. A rectangular voltage is applied to the output winding 4. A current, defined by the resistance value of the current sensor 7, also begins to flow through the additional winding 6. Due to the fact that for heart

5 0 5

current changes direction. This signal after the moment of arrival enters the threshold device 9 and when the threshold is reached, the counting trigger 5 is transferred again.

Thus, the magnetizing current of the transformer 3 is switching for switching transistors. 1 and 2, moreover, by changing the trigger level of the threshold device 9, it is possible to adjust the oscillation frequency to an almost unlimited range to the value determined by saturation induction. With an unbalanced load or an imbalance of the shoulders of the power amplifier, the symmetric mode is shifted, but since the threshold does not change, the pulse duration is corrected so that

that 1 „

The proposed generator provides with powerful pulses any radio engineering devices with a utilization rate of the transformer and transistors close to unity, with a high efficiency due to the exclusion of magnetizing currents.

The windings of the transformer must be placed orthogonal to the O-type cup cores made from ferrite. Power windings are placed inside the cup, and additional winding 6 is wound outside the core through the core.

The technical solution is simple in implementation and is applicable to the creation of highly efficient generators for various functional units of radio electronic equipment.

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five

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orthogonal transformer nickname

2 2

winding condition +13 (pg (figure 2), then the current flowing through the winding 6, and hence the current sensor 7, is proportional to the total induction f in the core. The current through the current sensor 7 begins to increase, and at the input of the threshold device 9

signal increases. As soon as the threshold device is inputted to the SIG-JQ, the sensor removed from the current sensor 7 reaches a predetermined trigger threshold, the threshold device 9 issues a signal for switching the trigger 5 to the opposite state. The transistor 1 is closed and the transistor 2 opens, a current of the opposite direction begins to flow, remagnetizing the core of the transformer. Signal at sensor 7

Spinner, current sensor, and the transformer is equipped with an additional winding placed on the transformer core orthogonally to the main windings and connected to the output winding through a current sensor that is connected to the input of the counting trigger through a series-connected rectifier and threshold device.

A rectangular pulse generator containing a push-pull power amplifier with a transformer output connected to the outputs of the counting trigger, characterized in that, in order to increase the output of the SD, by excluding the asymmetric mode of the transformer reversal, a threshold device, rectifier, current sensor and the transformer is provided with an additional winding placed on the transformer core orthogonally to the main windings and connected to the output winding via a current sensor that is under- connected to the input counting trigger connected in series through a rectifier and a threshold device.

FIG. g

Claims (1)

Form ul inventions Ί A rectangular pulse generator containing a push-pull power amplifier with a transformer output connected to the outputs of the counting trigger, characterized in that, in order to increase the efficiency by eliminating the asymmetric magnetization reversal mode of the transformer, a threshold device, a rectifier, a current sensor are introduced into it, and the transformer is equipped with an additional a winding placed on the transformer core orthogonally to the main windings and connected to the output winding through a current sensor, which sub-, keys to the input count trigger through a rectifier and threshold device connected in series.