A power-supply filter that is built into an integrated circuit package is disclosed. The printable calibration sheet includes at least one calibration reference segment printed on the sheet and one or more defined printing spaces on the sheet. A switch dome of the flexible conductive switch pad is shaped to make electrical contact with switch contacts formed on the PCB responsive to activation of the switch dome. The variable valve mechanisms and the intake air regulation are controlled during the compression ignition combustion so as to perform the compression ignition combustion.