Large-amplitude picosecond-level narrow pulse generating circuit

A generation circuit and high-amplitude technology, applied in the field of electronics, can solve the problems of small amplitude, difficult to realize amplitude pulse signal at the same time, difficult to meet the practical application requirements of semiconductor laser for pulse driving circuit, etc. Width, the effect of increasing the output power

Inactive Publication Date: 2017-06-20
EAST CHINA NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on the method of high-speed switching semiconductor devices generating pulse signals through capacitor charging and discharging, when each device generates pulse signals independently, it is difficult to simultaneously realize pulse signals with large amplitude and narrow width
The output pulse amplitude of the single-stage avalanche triode is rel

Method used

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  • Large-amplitude picosecond-level narrow pulse generating circuit
  • Large-amplitude picosecond-level narrow pulse generating circuit

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Embodiment

[0026] refer to figure 2 Each component of this embodiment will be described in detail below.

[0027] trigger signal generation circuit

[0028] In this embodiment, the trigger signal generating circuit is a square wave generator. It includes: an active crystal oscillator U1 and a comparator U2, the output terminal of the active crystal oscillator U1 is connected to the first input terminal of the comparator U2, and the second input terminal of the comparator U2 is connected to a fixed voltage signal; wherein the active crystal oscillator U1 generates a fixed frequency The sinusoidal signal, after passing through the comparator U2, becomes a square wave signal with a fast rising edge; it generates a square wave signal with an amplitude of 5V and a repetition frequency of 32.768KHz, and the rising edge of the trigger signal is 1~3ns.

[0029] The present invention is not limited thereto, the amplitude of the trigger signal may be between 3V~10V, and the signal repetition fr...

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Abstract

The invention discloses a large-amplitude picosecond-level narrow pulse generating circuit, and the circuit comprises a triggering signal, an avalanche transistor Marx cascading pulse generation circuit and a step recovery diode pulse shaping circuit. The avalanche transistor Marx cascading pulse generation circuit receives the triggering signal, and the step recovery diode pulse shaping circuit is connected with the avalanche transistor Marx cascading pulse generation circuit. The avalanche transistor Marx cascading pulse generation circuit enables an energy storage capacitor in an avalanche unit to generate a large-amplitude pulse in a mode of parallel charging and series charging, and then generates a large-amplitude narrow pulse through the step recovery characteristics of a step recovery diode. The front and rear edges are steeper, and the pulse amplitude is within the range from 20V to 30V. The pulse width is lower than 200ps, thereby meeting the demands of pulse drive application of a semiconductor laser.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a large-amplitude picosecond-level narrow pulse generating circuit. Background technique [0002] With the high development of information science and technology, people nowadays have higher and higher requirements for the design of semiconductor laser drive circuits, especially for some new semiconductor lasers, which can test the performance of lasers through electric pulse driving. pulse. [0003] At present, there are roughly two methods of using semiconductor devices to generate pulse signals: one is to use digital technology to generate narrow pulse signals; the other is to use high-speed switching semiconductor devices to control the capacitance of the capacitor through the on and off states of these devices. Charge and discharge generate a narrow pulse signal. [0004] The above-mentioned method of generating a narrow pulse signal using digital technology, the gener...

Claims

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Application Information

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IPC IPC(8): H03K3/335
CPCH03K3/335
Inventor 陈少强田赟鹏李鹏涛冉旭
Owner EAST CHINA NORMAL UNIV
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