Oscilloscope with logic analyzer frontend

摘要

An electronic test apparatus, such as an oscilloscope, comprising a logic analyzer frontend, wherein the logic analyzer frontend comprises a digital input port configured to receive a digital signal from a device under test. The logic analyzer frontend further comprises at least one analog-to-digital converter that is arranged downstream of the digital input port, and a digital comparator that is arranged downstream of the analog-to-digital converter. The digital comparator is configured to generate an adjusted digital signal and to provide the adjusted digital signal to further components of the electronic test apparatus. The logic analyzer frontend further comprises a digital correction unit configured to adjust a digital decision threshold value of the comparator.

主权项

1. An electronic test apparatus comprising:
a digital input port configured to receive a digital signal; at least one analog-to-digital converter (ADC) arranged downstream of the digital input port, wherein the ADC is configured to sample the digital signal to generate multi-bit digital samples representative of amplitudes of the digital signal over time; a digital comparator arranged downstream of the analog-to-digital converter, wherein the digital comparator is configured to generate an adjusted digital signal; and a digital correction unit configured to receive the adjusted digital signal from the digital comparator as a feedback signal, and to adjust a digital decision threshold value of the comparator based on the feedback signal.