An oscilloscope capable of generating multiple synchronous clocks

Abstract

A multipath synchronized clock generating oscilloscope is disclosed, comprising a clock generating module, a controlling and processing module and two analog-to-digital converters, wherein a high speed trigger module and a first clock fan-out module are arranged between the trigger synchronous signal output end of the controlling and processing module and synchronous input pins of the two analog-to-digital converters, the clock generating module outputs a synchronous clock signal to the clock input end of the high speed trigger module, the synchronous clock signal is in the same phase as a sampling clock signal, the trigger synchronous signal output end of the controlling and processing module outputs a trigger synchronous signal to the data input end of the high speed trigger module, the high speed trigger module outputs a fast rise synchronous signal to the first clock fan-out module, and the first clock fan-out module divides the fast rise synchronous signal into two paths of signals which are respectively output to the synchronous input pins of the two analog-to-digital converters. The oscilloscope provided in the invention is characterized in that the realization of analog-to-digital converter synchronization does not require that the input of the sampling clock be stopped.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to a digital oscilloscope, especially an oscilloscope capable of generating multiple synchronous clocks. Background technique [0002] In a digital oscilloscope, multiple analog-to-digital converters (abbreviated as ADC in English) are often required to simultaneously sample an input signal for interleaved sampling to increase the sampling rate. Or if there are multiple input signals, multiple analog-to-digital converters are required to simultaneously sample the multiple input signals to ensure that the sampling phases of the multiple signals are consistent. [0003] As the sampling frequency required for digital oscilloscopes is getting higher and higher, the sampling frequency of its internal analog-to-digital converters is also getting higher and higher, and digital oscilloscopes generally include multiple signal input channels, commonly 2-channel input and 4-cha...

AI Technical Summary

Problems solved by technology

[0013] In short, the existing technology has the following problems: in order to synchronize the two ADCs, the sampling clock needs to be stopped for a period of time, and the existing technology cannot guarantee the normal operation of the ADC during this period of time.

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