| 摘要 |
A method for determining the switching frequency of a DC-to-DC power supply for a portable radio transceiver ( 300 ) includes determining a first group of switching frequencies ( 301 ) and then determining the switching harmonics based on that group of switching frequencies ( 305 ). These switching harmonics are then compared to a group of desired radio channels ( 311 ) where it is then determined if the switching frequencies interfere with the group of desired radio channels ( 313 ). Based on these results, a second group of switching frequencies is selected if the first set of switching frequencies provides an undesired level of interference ( 317, 319, 321 ).
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