Current measurement apparatus including charge/discharge means and current measurement method using same
US11255886B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2018 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Feb 9, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current measurement apparatus comprises: a capacitor connected in parallel to a signal terminal of a device under test (DUT); a test pattern generation apparatus generating a test pattern to operate the DUT; and a measurement module connected to one end of the capacitor. The measurement module comprises: an input/output (I/O) buffer increasing or reducing an amount of charges of the capacitor and outputting a signal corresponding to an output logic value according to a voltage of the one end of the capacitor; a time measurer measuring an arrival time which it takes for the voltage of the one end of the capacitor to reach a second voltage from a first voltage; and a controller controlling the i/o buffer and the time measurer to measure the arrival time and controlling such that a value of a current related to an inspection of a DUT is measured using the arrival time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.