A multi-channel synchronous output calibration device and method

Abstract

The invention discloses a multi-channel synchronous output calibration device and method. The calibration device includes a clock module, a clock delay module, a waveform generation module, a pulse shaping module, a logic AND gate module, a pulse width measurement module and a synchronous control module. Among them, the pulse shaping module, logic AND gate module, and pulse width measurement module are used to obtain the synchronous delay error between channels. The circuit structure is simple, easy to implement in hardware, and complex calculations are avoided. ADC circuits and high-performance computing modules are not required, and the cost is low. During error correction, the calibration device sequentially adjusts the sampling clock delay and waveform phase through the clock delay module and the waveform generation module until the synchronous delay error between channels meets the design requirements, with high precision and good channel consistency. In addition, the pulse width measurement module adopts the combination of precise delay adjustment and edge detection, which effectively reduces the pulse width measurement error.

Description

technical field [0001] The invention belongs to the field of arbitrary waveform generation, in particular to a multi-channel synchronous output calibration device and method. Background technique [0002] Arbitrary waveform generator is a signal generation source based on digital, analog and computer technology. It can provide some conventional function waveforms, complex editable waveforms, environmental analog signals, digital modulation signals, etc. It is widely used in radar, communication, biological Medical and chip testing and other fields. Usually, arbitrary waveform generators integrate multiple output channels to meet the needs of users for multiple waveform signals, and have powerful signal excitation capabilities, including high-speed waveform generators, function generators, pulse / sequence generators, sweep frequency generator, trigger generator, broadband white noise signal generator and amplitude modulation source, etc. At the same time, the precise phase r...

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