Logic emulator
OwnerTomoyuki Inomoto, Kenichi Ishida +1inventors
InventorsTomoyuki Inomoto, Kenichi Ishida, Tomoo Kimura
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Abstract
The output controlling circuit acquires temperature data of the variable logic elements that the temperature sensing units detect, and makes the output of the variable logic elements into high impedance where an excessive current flows into the variable logic elements and the temperature thereof excessively rises. Therefore, it is possible to prevent signals from being colliding with each other between variable logic elements, and between each of the variable logic elements and the external device, and it is possible to prevent an excessive current from continuously flowing into the variable logic elements and the external device.
Claims12
A logic emulator connected to an external device for carrying out a verification, comprising:
- a under-verification circuit;
- a plurality of variable logic units, among which said under-verification circuit is divided and assigned, each variable logic unit being able to alter a logic emulated therein;
- a plurality of temperature sensing units provided so as to correspond to a plurality of said variable logic units, respectively, each temperature sensing unit being able to detect the temperature of its corresponding variable logic unit and convert the temperature to a quantity of electricity responsive to the temperature;
- and
- an output controlling unit operable to make the output of said variable logic unit whose temperature is detected, into high impedance when a level of a current amount responsive to the temperature reaches a prescribed level.
A logic emulator connected to an external device for carrying out a verification, comprising:
- a under-verification circuit;
- a plurality of variable logic units, among which said under-verification circuit is divided and assigned, each operable to alter the logic emulated therein;
- and
- an output controlling unit operable to make the output of said variable logic unit whose quantity of electricity is detected, into high impedance when the quantity of electricity responsive to a consumption current is detected for each of said variable logic units and the detected electricity quantity reaches a prescribed value.
A logic emulator connected to an external device for carrying out a verification, comprising:
- a under-verification circuit;
- a plurality of variable logic units, among which said under-verification circuit is divided and assigned, each operable to alter the logic emulated therein;
- a power supply ON and OFF sensing unit operable to sense ON-OFF states of a power supply of the external device and ON-OFF states of a power supply of said variable logic units;
- and
- a switching unit operable to connect said variable logic units and the external device to each other only when both the power supply of the external device and the power supply of said variable logic units are turned on.
Dependencies are inferred from the claim text.