ELECTRONIC BRAKE SYSTEM AND METHOD FOR OPERATING SAME

Disclosed is to an electronic brake system. The electronic brake system includes an integrated master cylinder having a simulation chamber, a first master chamber, and a second master chamber arranged in order from a side of a brake pedal, wherein the integrated master cylinder includes a simulation piston provided to be displaceable by the brake pedal to pressurize the simulation chamber, a first master piston configured to pressurize the first master chamber and having a diameter smaller than a diameter of the simulation piston, a second master piston configured to pressurize the second master chamber and having a diameter smaller than a diameter of the first master piston, and an elastic member interposed between the simulation piston and the first master piston to provide the brake pedal with a reaction force.