Electronic circuit for protecting a load against over-voltage
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorHans Kramer
Life of this patent
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Abstract
An electronic circuit for protecting a load against over-voltage is disclosed. The electronic circuit comprises an input port for receiving a voltage and an output port for feeding the voltage to the load. The electronic circuit further comprises a switching unit arranged to switch on and off the voltage from the input port. Moreover, the electronic circuit comprises a capacitive component arranged to receive the voltage when the switching unit is switched on and is otherwise arranged to feed voltage to the output port. Furthermore, the electronic circuit comprises a comparing unit configured to control the switching unit to be switched off when a value at the output port exceeds a first threshold; and to control the switching unit to be switched on when the value is below a second threshold.
Claims6
An electronic circuit for protecting a load against over-voltage, the electronic circuit comprising:
- an input port for receiving a voltage from a power source;
- an output port for feeding the voltage to the load;
- a first switching unit, connected to the input port and the output port, wherein the first switching unit is arranged to switch on and off the voltage from the input port;
- a capacitive component, connected to the output port, wherein the capacitive component is arranged to receive the voltage when the first switching unit is switched on and to feed the voltage to the output port when the first switching unit is switched off;
- a first comparing unit, connected to the first switching unit and the output port and arranged to obtain a value of the voltage at the output port, wherein the first comparing unit is configured to:
- control the first switching unit, via a first comparator of the first comparing unit, to be switched off when the value exceeds a first threshold indicating a highest voltage to be fed to the output port;
- and
- control the first switching unit, via the first comparator, to be switched on when the value is below a second threshold indicating a least voltage to be fed to the output port, wherein the first comparator is configured to compare reference voltages that include the first threshold value and the second threshold value of the voltage;
- and
- a second comparing unit connected to the input port and the first comparing unit, wherein the second comparing unit comprises a second comparator in communication with a second switching unit, wherein the second comparing unit is configured to control power supply to the first comparing unit, based on the voltage received from the power source.
Dependencies are inferred from the claim text.