| 摘要 |
An electronic apparatus comprising a radio transmitter is disclosed. In a computer system ( 1 ) having a radio transmission circuit ( 3 ) of a phase modulation type supplied with power from a power supply ( 4 ) of a switching type, the switching frequency of the power supply ( 4 ) is determined based on the comparison frequency for the sampling operation of a PLL circuit ( 10 ) of the radio transmitter, thereby removing the power noises generated from the switching regulator of the radio transmitter of a phase modulation type.
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