An ignition coil assembly includes a base member formed with collars having corrugated faces at the bottom ends thereof. The multifunction catheter comprises a flexible tubular catheter body, an inflatable balloon assembly capable of multi-stage inflation at a distal end of the catheter body, at least one fluid delivery conduit formed on the catheter body, and at least one balloon control conduit formed within the catheter body. a backsheet spanning at least the crotch region;c. The two permeable electrodes are arranged generally parallel to one another and are relatively closely spaced from one another. The first DAC 142 outputs an analog signal obtained from the DA conversion to an analog mixer and the analog mixer performs a mixing process to the analog signal to output. The scheduler, at its discretion, may schedule a request after its requested deadline in response to receiving a new request command from a client.