Electric apparatus including receiver
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Jan 27, 2005
app pub date -
Jul 13, 2004
filing date -
Jul 22, 2003
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Abstract
This invention prevents a reception disturbance provoked by a higher harmonic generated from a power supply device. When a channel of a broadcast wave of radio broadcasting is selected, a receiving frequency is acquired. An oscillatory frequency is detected from an output voltage on a secondary side of the power supply device. The receiving frequency is compared with the oscillatory frequency. It is determined whether a difference between the receiving frequency and a frequency that is n times as high as the oscillatory frequency, where n is a natural number, is within a deviation. If this difference is not within the deviation, then it is determined that the higher harmonic does not influence reception of the broadcast wave, and the broadcast wave is received. If the difference is within the deviation, it is determined that the higher harmonic influences the reception of the broadcast wave. Therefore, an operation of a load device which operates irrespectively of the reception is turned on or off. As a result, a load on the power supply device fluctuates, and the oscillatory frequency changes. The influence of the higher harmonic on the reception of the broadcast wave is eliminated.
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