Patent ID: 6300879
Filing Date: 2001-10-09
Classification: B60R

Abstract:
A wake-up circuit for a vehicle control module interconnected via a bus network to a vehicle data communication system of a motor vehicle, the vehicle control module being remotely located from the vehicle data communication system, comprising:an input voltage source;a bus detection stage for detecting bus activity on the bus network, said bus detection stage being operative to provide an input signal in response to detecting bus activity;an input stage connected to said input voltage source and said bus detection stage, said input stage being operative to supply a voltage from said input voltage source in response to receiving said input signal from said bus detection stage, said input stage including a MOSFET device, wherein the drain of said MOSFET device is connected to said input voltage source and the gate of said MOSFET device is connected to said bus detection stage;an output stage operatively connected to said input stage for supplying an output voltage to the vehicle control module in response to the voltage supplied by the input stage, the output stage including a voltage regulator for supplying the output voltage to the vehicle control module, wherein said voltage regulator is connected to the source of said MOSFET device; anda noise isolation stage positioned between said input stage and said output stage for isolating said voltage regulator from the remainder of the wake-up circuit.