Voltage measurement and/or overvoltage protection circuit for a measurement instrument
AssigneeRohde & Schwarz GmbH & Co. KG
InventorFranz Strasser
Life of this patent
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Abstract
A voltage measurement and/or overvoltage protection circuit for a measurement instrument comprising a measurement channel with at least one termination resistor and a measurement port is provided. Said voltage measurement and/or overvoltage protection circuit comprises at least one resistor. In this context, the voltage measurement and/or overvoltage protection circuit is contactable to the measurement port via said at least one resistor. In addition to this, a resistance of the at least one resistor is higher than a maximum resistance of the at least one termination resistor.
Claims20
A voltage measurement or overvoltage protection circuit or any combination thereof for a measurement instrument comprising a measurement channel with at least one termination resistor and a measurement port,
- said voltage measurement or overvoltage protection circuit or any combination thereof comprising:
- at least one resistor,
- wherein the voltage measurement or overvoltage protection circuit or any combination thereof is contactable to the measurement port via said at least one resistor, and
- wherein a resistance of the at least one resistor is higher than a maximum resistance of the at least one termination resistor.
An overvoltage protection method for operating a measurement instrument comprising a measurement channel with at least one termination resistor, a measurement port, and a voltage measurement or overvoltage protection circuit or any combination thereof being contacted to the measurement port,
- said at least one termination resistor being switchable between at least a first termination resistor comprising a first termination resistance and a second termination resistor comprising a second termination resistance being lower than said first termination resistance, said overvoltage protection method comprising the steps of:
- measuring a voltage with respect to the measurement port via at least one resistor, a resistance of said at least one resistor being higher than a maximum resistance of the at least one termination resistor,
- switching to the first termination resistor if a defined voltage threshold is exceeded with respect to the second termination resistor, or
- forbidding switching to the second termination resistor if the defined voltage threshold is exceeded with respect to the second termination resistor.
Dependencies are inferred from the claim text.