Patent ID: 7705653

Claim:
An interface system for delivering an output signal in response to a first medical-device input signal and a second medical-device input signal, said interface system comprising: medical-device interface that connects to a medical device; a signal input for receiving said first medical-device signal and said second medical-device signal, said first medical-device signal and said second medical-device signal being received via said medical-device interface, said first medical-device signal and said second medical-device signal each having a different marking voltage characteristic, a detector circuit configured to receive said first medical-device signal and said second medical-device signal from said signal input, said detector circuit detecting whether said first medical-device signal or said second medical-device signal is received by determining a charge corresponding to said marking voltage characteristic of said first medical-device signal or said second medical-device signal, said charge indicating whether said first medical-device signal or said second medical-device signal is received at said signal input; a translator circuit that translates either said first signal or said second signal into said output signal; and a digital-signal-processor interface that connects to a digital signal processor, the output signal being sent to said digital signal processor via the digital-signal-processor interface, wherein said detector circuit comprises a rectifier-capacitor circuit or a resistor-capacitor circuit.