Waveform input circuit, waveform observation unit and...

Details Waveform input circuit, waveform observation unit and... Waveform input circuit, waveform observation unit and...

2006-03-03

2009-12-15

Feliciano, Eliseo Ramos (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C324S763010

Reexamination Certificate

active

07634370

ABSTRACT:
A waveform input circuit, waveform observation unit and semiconductor test apparatus allow to faithfully observe waveform of a device under test with high output impedance and low load driving capability. A waveform input circuit includes a high input impedance terminating resistance which receives an input signal from a transmission line, a relay which selects a terminating resistance, an input buffer which is connected when the high input impedance terminating resistance is selected. A reference potential switch is further provided to select a reference potential of the transmission line where one reference potential is controlled to be in phase with the input signal by an input buffer which is connected when the high input impedance terminating resistance is selected.

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patent: 2-227680 (1990-09-01), None
patent: 2001-007660 (2001-01-01), None

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