Protective circuit
AssigneeHottinger Baldwin Messtechnik GmbH
InventorReinhard Voelger
Life of this patent
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Abstract
A circuit for protecting an electronic functional unit connected to a data line against positive and negative overvoltages includes an analog switch arranged in the data line before the electronic functional unit and a voltage monitor, which is configured to control the analog switch, wherein the voltage monitor is configured to close the analog switch when no overvoltage occurs and to open the analog switch when an overvoltage occurs. The circuit also functions in an energy-saving mode and/or when no supply voltage is applied. The low resistance and bidirectionality of the data line are maintained.
Claims16
1-15. (canceled)
A circuit for protecting an electronic functional unit connected to a data line against positive and negative overvoltages, comprising:
- an analog switch arranged in the data line upstream of the electronic functional unit;
- and
- a voltage monitor configured to control the analog switch, wherein the voltage monitor is configured to close the analog switch when no overvoltage occurs, and to open the analog switch when an overvoltage occurs.
Dependencies are inferred from the claim text.