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US 9,541,584 B2Granted
Digital voltmeter topology
AssigneeKeithley Instruments, LLC
InventorWayne Goeke
Life of this patent
Estimating the term…
Abstract
A system may include two input terminals, e.g., HI and LO, and a floating circuit that is physically separate from the input terminals and includes a gain amplifier. The floating circuit can be surrounded by a conductive enclosure that is electrically connected to the second input terminal. The floating circuit can further switch between input signals received from the first and second input terminals to the gain amplifier and the floating circuit ground.
Claims11
A system comprising:
- a first input terminal;
- a second input terminal;
- a floating circuit that is physically separated from the first and second input terminals by a conductive enclosure that has the same electric potential as the second input terminal, wherein the floating circuit includes a gain amplifier and is surrounded by the conductive enclosure;
- and
- one or more switches within the conductive enclosure and configured to switch input signals received from the first and second input terminals between a positive input of the gain amplifier and a floating circuit ground of the floating circuit.
2 more elements
Dependencies are inferred from the claim text.