| 摘要 |
A unique method and apparatus for detecting the power level of communication signals, such as RF communication signals being transmitted from a wireless communication device (100), increases the dynamic range of a conventional power detector. The method and apparatus selectively switches between two power detection paths (314, 317) with different operating ranges. More particularly, when a transmitted signal having a power within a predetermined range is detected, a first path is biased to transmit the RF communication signal. The predetermined range could be determined, for example, by a number of power steps. Similarly, when a transmitted signal having a power in a second predetermined range is detected, such as a low power transmitted signal, a second path provided. Preferably, the second path includes an amplifier (372) to offset the loss of resolution as the detect voltage is low.
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