Abstract: A positive overshoot detection circuit comprises a transistor coupled to a current mirror, a reference current source coupled to the current mirror, and a comparator coupled to the reference current source and the current mirror. The comparator output indicates whether the current mirror's current is greater than the reference current source's current. A control input and a current terminal of the transistor are coupled to a clamping circuit. A negative overshoot detection circuit comprises a biasing sub-circuit coupled to a transistor, a resistor coupled to the transistor, and a comparator coupled to the transistor and the resistor. The comparator output indicates whether the transistor is in an on or off state. The biasing sub-circuit is coupled to a clamping circuit. In some implementations, the comparator outputs from the positive and negative overshoot detection circuits are provided to a driver circuit, which modifies its operation.

Abstract: A method performed by a function node for handling a voice call from a first User Equipment (UE) to be received by a second UE in a communications network. The function node is associated with the second UE. The function node receives an invite message that relates to an initiation of the voice call from the first UE to the second UE and comprises one or more parameters associated with the second UE and a time stamp of the initiating of the voice call. The function node retrieves location data from a home server associated with the second UE, based on the one or more parameters and the time stamp, which location data indicates a geographical location of the second UE. The function node predicts a reason why the second UE cannot receive the voice call, based on the location data.