Abstract: A logical circuit is configured by connecting a plurality of circuit blocks. A driving ability value computation unit computes a driving ability value required for a target circuit block based on a delay rate of the circuit block indicating a rate of delay of a signal traveling in the circuit block by a load capacity value provided by the circuit block, a driving ability value of a prior stage circuit block prior to the target circuit block, and a load capacity value provided for the target circuit block. A change unit changes the specification of the device used in the target circuit block based on the driving ability value obtained by the driving ability value computation unit.

Abstract: In the carbonated water supply system 1, water supplied from the water supply 2 through the water supply conduit 3 is supplied to the carbonator 5 through the water supply valve 4 and high pressure strong carbonated water is produced in the carbonator 5 and supplied to the water purifier 7 through the conduit 8A. Further, high pressure strong carbonated water in the water purifier 7 is purified therein while retaining its high pressure and is supplied to the pressure releasing valve 9 through the conduit 8B, the water supply valve 10. High pressure strong carbonated water is discharged out of the system 1 through the pressure releasing valve 9 as low pressure carbonated water the pressure of which is as same as the atmospheric pressure.

Abstract: A logical circuit is configured by connecting a plurality of circuit blocks. A driving ability value computation unit computes a driving ability value required for a target circuit block based on a delay rate of the circuit block indicating a rate of delay of a signal traveling in the circuit block by a load capacity value provided by the circuit block, a driving ability value of a prior stage circuit block prior to the target circuit block, and a load capacity value provided for the target circuit block. A change unit changes the specification of the device used in the target circuit block based on the driving ability value obtained by the driving ability value computation unit.

Abstract: In order to edit and indicate the relations between drawings to allow easy understanding during entry of logic drawings, a logic drawing entry apparatus according to the present invention comprises a means for creating an inter-drawing connection diagram file, which describes relations of mutual connections between a plurality of drawings, and an inter-drawing connection indication means which indicates, on one screen, a plurality of the drawings outlined according to the description in the inter-drawing connection diagram file which has been created.

Abstract: In the carbonated water supply system 1, water supplied from the water supply 2 through the water supply conduit 3 is supplied to the carbonator 5 through the water supply valve 4 and high pressure strong carbonated water is produced in the carbonator 5 and supplied to the water purifier 7 through the conduit 8A. Further, high pressure strong carbonated water in the water purifier 7 is purified therein while retaining its high pressure and is supplied to the pressure releasing valve 9 through the conduit 8B, the water supply valve 10. High pressure strong carbonated water is discharged out of the system 1 through the pressure releasing valve 9 as low pressure carbonated water the pressure of which is as same as the atmospheric pressure.