Multichannel synchronous output calibrating apparatus and method

Abstract

The invention discloses a multichannel synchronous output calibrating apparatus and method. The calibrating apparatus includes a clock module, a clock time 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, wherein an inter-channel synchronous time delay error is obtained by adopting the pulse shaping module, the logic AND gate module and the pulse width measurement module. The circuit structure is simple, the hardware implementation is easy, the complex calculation is avoided, an ADC circuit and a high-performance calculation module do not need and the cost is low; when the error is corrected, the calibrating apparatus adjusts a time delay and a waveform phase of a sampling block sequentially via the clock time delay module and the waveform generation module until the inter-channel synchronous time delay error reaches to a designed requirement, so the precision is high and thechannel consistency is good; and in additional, since a cooperative manner of precise time delay adjustment and edge inspection is adopted by the pulse width measurement module, a pulse width measurement error is effectively reduced.

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 Various fields such as medical treatment and chip detection. 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, t...

AI Technical Summary

Problems solved by technology

At the same time, during error correction, the internal calibration module only adjusts the phase of the waveform, and cannot correct the error caused by the delay of the sampling clock, resulting in poor channel consistency.

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