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US 11,768,248 B2Granted
Estimation of unknown electronic load
AssigneeKeithley Instruments, LLC
InventorWilliam C. Weeman
Life of this patent
Estimating the term…
Abstract
A test and measurement instrument including a voltage source configured to output a source voltage, a current sensor, and one or more processors. The one or more processors are configured to determine an estimation of a load of an unknown connected device under test based on the source voltage, the current sensor, and a voltage of the connected device under test without any prior knowledge of the connected device under test.
Claims9
A test and measurement instrument, comprising:
- a voltage source configured to output a source voltage;
- a current sensor configured to sense a current through a connected device under test;
- and
- one or more processors configured to
- iteratively determine an estimation of a load of an unknown connected device under test, the estimation of the load including an estimation of a resistance and a capacitance or an estimation of a resistance and an inductance, the estimation based on the source voltage, the current, and a voltage of the unknown connected device under test, wherein the estimation of the load is adjusted upwards or downwards at each iteration, and to
- iteratively adjust a value of the resistance based on whether an output of a normal resistance equation is positive or negative and adjust a value of the capacitance or the inductance based on whether an output of a normal capacitance or inductance equation is positive or negative.
3 more elements
A test and measurement instrument, comprising:
- a voltage source configured to output a source voltage;
- a current sensor configured to sense a current through a connected device under test;
- and
- one or more processors configured to iteratively determine an estimation of a load of an unknown connected device under test based on the source voltage, the current, and a voltage of the unknown connected device under test, wherein the estimation of the load is adjusted upwards or downwards at each iteration, in which iteratively determining the estimation of the load includes:
- selecting arbitrary starting values for the load;
- determining simultaneously the source voltage and the voltage of the connected device under test;
- determining based on the source voltage, the voltage of the connected device under test, and the arbitrary starting values for the load whether to adjust an estimated value of a resistance of the load in a positive or negative direction and whether to adjust an estimated value of a capacitance or inductance of the load in a positive or negative direction;
- and
- adjusting the arbitrary starting values for the resistance and the capacitance or inductance either positively or negatively such that the adjusted values represent the estimation of the load.
6 more elements
Dependencies are inferred from the claim text.