Generating device and method of large-amplitude ultra-high speed synchronization pulse

Abstract

The invention discloses a generating device of a large-amplitude ultra-high speed synchronization pulse. The generating device of the large-amplitude ultra-high speed synchronization pulse comprises an input signal shaping circuit and a synchronization pulse generating circuit, wherein the input signal shaping circuit is used for shaping input trigger pulse signal to output low voltage positive pole emitter coupling logic (LVPECL) reference level signal, and the synchronization pulse generating circuit is used for generating the large-amplitude ultra-high speed synchronization pulse with the LVPECL reference level signal as trigger signal. No transistor with an extremely high working voltage is needed in the generating device and method of a large-amplitude ultra-high speed synchronization pulse, therefore, voltage demand on a direct current voltage source is not high. Key functions of the generating device and method of a large-amplitude ultra-high speed synchronization pulse is achieved by a multilevel broadband transistor circuit which can send out positive pulse and negative pulse with pulse front smaller than 200ps and amplitude close to 15V. Meanwhile, compared with input synchronization pulse, delaying time shake of output synchronization pulse is small and smaller than 20ps.

Description

technical field [0001] The invention relates to the technical field of high-speed pulse generators, in particular to a device and method for generating large-amplitude ultra-high-speed synchronous pulses with signal fronts and pulse widths at the sub-nanosecond level. Background technique [0002] With the development of high technology, the high-precision measurement equipment used in the measurement field has higher and higher requirements for the large-scale trigger pulse source, not only requiring that it can provide certain signal characteristics (including rise and fall time, pulse width, amplitude, etc. ) pulse, and with the use of more and more high-precision measurement equipment, the requirements for the leading edge time of the signal and the delay time of the trigger signal are also getting higher and higher. Many high-bandwidth oscilloscopes, spectrometers and other measurement The 200ps large-amplitude (close to ±15V) pulse signal is used as the trigger source ...

AI Technical Summary

Problems solved by technology

The high-speed switching transistor circuit will turn on or off the transistor instantaneously under the condition of input trigger signal, so as to output a voltage value that has been prepared in advance at an input terminal. This technology can give a very high voltage, but due to Due to the limitation of transistor bandwidth, this kind of circuit can only generate a large-amplitude signal with a leading edge of several nanoseconds, and generally the pulse width is relatively wide, so it is impossible to achieve precise triggering of high-precision measurement equipment

[0004] The avalanche tube circuit can generate large-amplitude pulses with a pulse front of nanoseconds, an amplitude ranging from a few volts to hundreds of volts, and a pulse width of several nanoseconds. However, this scheme has two disadvantages: 1. It requires dozens or even hundreds of A DC voltage source of 100 volts supplies power to the circuit, so that the avalanche tube is always in the state of avalanche pre-triggering, so that an avalanche can be generated under the condition of a small trigger pulse input, thereby outputting a high-speed pulse, that is to say, this implementation scheme There are relatively high requirements for the DC voltage source; 2. The high-speed pulse leading edge generated by the avalanche tube circuit is still at the nanosecond level, which is still far behind the requirement of less than 200ps rising leading edge required by high-precision measuring equipment

[0005] Moreover, due to the small application range of the ultra-high-speed synchronous pulse with a large amplitude and a very short leading time, there are few studies on its generation method.

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