Programmable picosecond level delay pulse generation device and method

Abstract

The present invention discloses a programmable picosecond level delay pulse generation device and method. The coarse delay generation module of the device runs in a system clock, counts the system clock, and generates an initial pulse signal with the pulse width of a system clock cycle and a coarse delay pulse signal. A fine delay generation module is a signal delay chain with multiple tap inputs and corresponding tap selection inputs. A coarse delay pulse is sent to each tap input of the signal delay chain through a global clock driving network module. A fine delay programming module generates a corresponding one-hot to each tap selection input of the signal delay chain according to needed fine delay, thus controls the coarse delay pulse to pass each fine delay unit in the signal delay chain or not, and outputs an end pulse at the tail end of the signal delay chain. According to the device and the method, through the control of the fine delay generation module by the coarse delay generation module, the ten-picosecond accurate delay of the coarse delay pulse signal can be realized through the signal delay chain, and a delay dynamic range can be a few seconds.

Description

technical field [0001] The present invention relates to the technical field of precision time delay and measurement, and more particularly, the present invention relates to a programmable picosecond delay pulse generation device and method. Background technique [0002] Delayed pulse generators are often used in high-precision trigger synchronization and calibration of time-to-digital converters, and are also widely used in the field of automated test instruments. The precise time delay has important applications in many fields such as aerospace, space research, communication, biomedicine, geodynamics, relativity research, etc., for example: time-of-flight measurement systems of space high-energy particle spectrometers and plasma spectrometers, Time-of-flight mass spectrometers, satellite altimeters, space range finders, space telemetry, time calibration in the field of quantum communications, etc. The application of precision time delay technology has penetrated into all a...

AI Technical Summary

Problems solved by technology

[0003] The current delay circuit is mainly divided into analog delay circuit and digital delay circuit. The analog delay circuit has the disadvantages of large inherent system delay, fixed delay and poor delay accuracy due to the use of analog devices to generate delay, which limits However, the digital delay circuit has the advantages of high delay precision and programmable time, but it can only be realized by a special delay chip at present, but the price of the special programmable delay chip is relatively expensive, and the function and mode are relatively single , causing inconvenience to the circuit design

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