Multiplexing device for multiplexing signals

Abstract

The invention provides a multi-channel signal multiplexing device, which includes a multi-channel active probe, a multi-channel signal conditioning circuit and a signal selection circuit; the multi-channel active probe sends the measured multi-channel signals to the In the multi-channel signal conditioning circuit, the multi-channel signal after conditioning is divided into two groups, one group is output to the digital signal acquisition channel, and one group is output to the signal selection circuit; the signal selection circuit selects the input multi-channel signal, and the One or more signals are sent to the analog signal acquisition channel. The invention makes it possible to conveniently and synchronously observe the logic sequence and waveform of a plurality of digital signals without moving the connection position of the probe during the test, the synchronization of the signal observation can be better guaranteed, and the test speed is improved.

Description

technical field [0001] The invention relates to a multiplex signal multiplexing device. Background technique [0002] Mixed signal analysis is the main method of testing signal integrity. In the testing of high-speed digital circuits and chips, signal integrity analysis is essential. It is widely used in various electronics-related industries such as communications, consumer electronics, and semiconductor manufacturing. Applications. [0003] Mixed signal analyzers generally include two to four analog channels and more than 16 digital channels. The analog channel properly adjusts the signal and performs A / D conversion to restore its waveform; the digital channel digitizes and collects the signal to observe its timing logic. The current mixed-signal analyzers send signals from analog probes and digital probes respectively. Since there are dozens of digital channels and generally only two to four analog channels, it is necessary to observe the waveform and timing of these di...

AI Technical Summary

Problems solved by technology

The current mixed-signal analyzers send signals from analog probes and digital probes respectively. Since there are dozens of digital channels and generally only two to four analog channels, it is necessary to observe the waveform and timing of these digital signals at the same time. It is extremely inconvenient to constantly move the analog probe to test different signals

As the integration of electronic systems becomes higher and higher, the number of signals on the bus or chips increases, and the connection of test probes becomes more difficult. It is very inconvenient and time-consuming to use several analog probes to test dozens or even hundreds of signals. lot of time

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