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Picosecond pulse generator provided with avalanche transistor and Marx circuit and based on micro-strip transmission

An avalanche triode and picosecond pulse technology, which is applied in the direction of electric pulse generator circuit and semiconductor device with avalanche effect to generate pulses, can solve the problems of unadjustable voltage, small pulse amplitude, and unsatisfactory

Active Publication Date: 2017-01-25
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the pulses generated by tunnel diodes and step recovery diodes can generate pulses with a pulse width of picosecond level, but the amplitude of the generated pulses is relatively small, generally only on the order of several hundred millivolts
However, if the avalanche transistor is selected as the pulse source for switching, the generated pulse can not only meet the requirements of picosecond pulse width, but also increase the amplitude to hundreds of volts, but it still cannot meet the amplitude required for the study of picosecond pulse biological effects. value (usually thousands of volts), and its output voltage is not adjustable

Method used

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  • Picosecond pulse generator provided with avalanche transistor and Marx circuit and based on micro-strip transmission
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  • Picosecond pulse generator provided with avalanche transistor and Marx circuit and based on micro-strip transmission

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Embodiment 1

[0057] An avalanche triode Marx circuit picosecond pulse generator based on microstrip transmission, comprising circuit units T1-Tn and a DC power supply; n>14.

[0058] in:

[0059] The circuit unit T1 includes an avalanche transistor Q1, a resistor R11, an inductor Lz11, a capacitor Cz11, a capacitor Cz12, a capacitor C1, an inductor Lz12 and a double-throw switch K1, wherein the inductor Lz11 and the inductor Lz12 are microstrip transmission lines considering the microstrip transmission theory Equivalent stray inductance, capacitor Cz11, capacitor Cz12 consider the equivalent stray capacitance of the microstrip transmission line under the theoretical situation of microstrip transmission;

[0060] The emitter of the avalanche transistor Q1 is grounded;

[0061] The collector of the avalanche transistor Q1 is connected to the bus after the resistor R11 is connected in series; the bus is connected to the positive pole of the DC power supply, and the negative pole of the DC po...

Embodiment 2

[0087] The main technical scheme of this embodiment is the same as that of Embodiment 1, further, see Figure 4 , the contact x is fixed on the rotating shaft of the stepping motor; the contacts 1 to n-1 are distributed around the rotating shaft of the stepping motor; when the rotating shaft of the stepping motor rotates, the contact x is driven rotate, and make contact with each of the contacts 1 to n-1 in turn. The main components used in this embodiment are as follows:

[0088]

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Abstract

The invention aims to provide a picosecond narrow-pulse signal source with high output voltage, high repetition frequency and adjustable output voltage for an impulse pulse radiating antenna, and the picosecond narrow-pulse signal source is simple in structure and stable and reliable in operation. According to the technical scheme adopted to achieve the purposes, a picosecond pulse generator provided with an avalanche transistor and a Marx circuit and based on micro-strip transmission comprises circuit units T1-Tn, a DC power source, a trigger signal generation and control module and a stepping motor, wherein a contact x is fixed on a rotating shaft of the stepping motor; contacts 1-(n-1) are distributed on the periphery of the rotating shaft of the stepping motor; when the rotating shaft of the stepping motor rotates, the contact x is driven to rotate and is sequentially contacted with all the contacts 1-(n-1).

Description

technical field [0001] The invention belongs to the field of bioelectromagnetic technology, and mainly relates to an avalanche triode Marx circuit picosecond pulse generator based on microstrip transmission theory. Background technique [0002] Due to the great application potential of electric field pulse on the influence of cell structure and function and its therapeutic effect on organisms, it has gradually become a research hotspot in the field of bioelectromagnetic technology. [0003] The electric field pulse signal with a pulse width of picosecond level (hereinafter referred to as "picosecond pulse") has rich ultra-wideband spectrum, high time resolution and spatial resolution, and small signal distortion. It is an ideal signal for impulse pulse radiation antenna source. [0004] The picosecond pulse signal source can be divided into two categories according to its generation method: one is to select the air switch as the switch and then obtain the high-voltage picos...

Claims

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Application Information

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IPC IPC(8): H03K3/335
CPCH03K3/335
Inventor 李成祥张睿哲王恩照姚陈果米彦谭坚文
Owner CHONGQING UNIV
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