Floating grid modulator

Abstract

The invention discloses a floating grid modulator. As a leakage inductance peak adsorption unit is arranged between an isolating transformer and a pulse shaping driver module, the floating grid modulator can adsorb a leakage inductance peak in an output signal of the isolating transformer so as to avoid using a low-leakage inductance transformer with relatively complex preparation process, large volume and high cost; therefore, the cost and volume of the floating grid modulator can be conveniently reduced. An extra capacitor does not need to be connected with the outside of a main switch, and a large-resistance bleeder resistor R9 is combined with an inherent distributed capacitor in the main switch to maintain the conduction level of the main switch, so that the volume of the floating grid modulator is reduced. Signal driving is realized by using a driver IR2110, and the common conduction time of the main switch and a truncated switch tube is reduced by using the time delay characteristic of the device, so the circuit loss is reduced and the efficiency is improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a floating gate modulator of building block power components used in communication, guidance and electronic countermeasure equipment, and can also be applied to floating gate modulators of other electric vacuum amplifiers. Background technique [0002] The microwave power module is a building block power component mainly used in electronic system equipment such as microwave data link communication, radar, electronic countermeasures and guidance instruments. In the broadband microwave power module, the high-power amplifier uses a miniature traveling wave tube (VPB). The floating gate modulator that controls the operation of the VPB becomes an important part of the microwave power module. The main technical indicators and application requirements of the microwave power module are similar to those of the floating The technical realization of the gate modulator is related to the ...

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Problems solved by technology

[0007] However, from figure 1 It can be seen from the structure that if there is no special treatment, the trailing edge of the control signal of the main switch tube and the trailing edge of the control signal of the truncated switch tube start at the same time, then when applied to the main switch tube and the truncated switch tube, the main switch The conduction time of the tube and the truncated switch tube at the same time is about the same and relatively long, which makes the circuit loss larger

[0008] Secondly, there is a leakage inductance in the isolation transformer, and the existence of the leakage inductance will cause a leakage inductance peak in the output signal. If the leakage inductance is large and no measures are taken, it will cause the malfunction of the switch tube

In order to reduce the leakage inductance, you can use a transformer wound in a conventional way to reduce the leakage inductance, but the production of this kind of transformer is relatively complicated, which will increase the cost, and the transformer with low leakage inductance will also cause the defect of larger volume, which cannot be miniaturized. integration

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