Large-amplitude picosecond-level narrow pulse generating circuit

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...

AI Technical Summary

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 relatively large, up to several volts or even more than ten volts, but its output pulse width is on the order of nanoseconds; the step recovery diode can output pulse signals on the order of picoseconds, but the generated The amplitude is small, it is difficult to meet the practical application requirements of semiconductor lasers for pulse drive circuits

Images