Electronic apparatus
First Claim
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1. An electronic apparatus operating based on a plurality of types of clocks including a spread spectrum clock having a frequency spectrum that is spread and a non-spread spectrum clock having a frequency spectrum that is not spread, the electronic apparatus comprising:
- a plurality of ICs using the clocks as references for operations, at least one clock that is used by a largest number of ICs being the spread spectrum clock from among the plurality of types of clocks.
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Abstract
The invention efficiently decreases EMI noise occurring with regard to the entirety of an electronic apparatus with a plurality of clocks as references for the operations. The spread spectrum is applied to the clock used by the largest number of ICs, that is, a display clock from among three types of clocks.
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Citations
7 Claims
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1. An electronic apparatus operating based on a plurality of types of clocks including a spread spectrum clock having a frequency spectrum that is spread and a non-spread spectrum clock having a frequency spectrum that is not spread, the electronic apparatus comprising:
a plurality of ICs using the clocks as references for operations, at least one clock that is used by a largest number of ICs being the spread spectrum clock from among the plurality of types of clocks. - View Dependent Claims (6)
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2. An electronic apparatus operating based on a plurality of types of clocks including a spread spectrum clock having a frequency spectrum that is spread and a non-spread spectrum clock having a frequency spectrum that is not spread, the electronic apparatus comprising:
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a plurality of ICs using the clocks as references for operations; and
at least one clock generator generating the clocks, at least one clock with a longest signal path from the clock generator generating the clock to the IC where the clock is ultimately provided being the spread spectrum clock from among the plurality of types of clocks.
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3. An electronic apparatus, comprising:
a structure being operable based on a plurality of types of clocks including a spread spectrum clock having a frequency spectrum that is spread and a non-spread spectrum clock having a frequency spectrum that is not spread, at least one clock with a highest frequency being the spread spectrum clock from among the plurality of types of clocks.
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4. An electronic apparatus operating based on a plurality of types of clocks including a spread spectrum clock having a frequency spectrum that is spread and a non-spread spectrum clock having a frequency spectrum that is not spread, the electronic apparatus comprising:
at least one clock generator generating the clocks, at least one clock with a highest output current from the clock generator being the spread spectrum clock from among the plurality of types of clocks.
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5. An electronic apparatus operating based on a plurality of types of clocks including a spread spectrum clock having a frequency spectrum that is spread and a non-spread spectrum clock having a frequency spectrum that is not spread, the electronic apparatus comprising:
at least one clock generator generating the clocks, at least one clock with a highest driving power voltage of driving the clock generator being the spread spectrum clock from among the plurality of types of clocks.
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7. A projector, comprising:
a liquid crystal panel operable based on a plurality of types of clocks including a spread spectrum clock having a frequency spectrum that is spread and a non-spread spectrum clock having a frequency spectrum that is not spread, at least one clock ultimately provided to the liquid crystal panel being the spread spectrum clock from among the plurality of types of clocks.
Specification