| 摘要 |
An amplifier having a first transistor with an output coupled to a common output node and a switch for coupling a control electrode of the first transistor to a first bias source to bias such first transistor to a conducting state during a relatively high power operating mode or for removing such control electrode from the first bias source to place the first transistor in a non-conducting condition during a relatively low power operating mode selectively in accordance with a control signal. A second transistor has an output coupled to the common output node and a second bias source coupled to a control electrode to the second transistor to bias such second transistor to a conducting state during both the relatively high power operating mode and the relatively low power operating mode. ® KIPO & WIPO 2007
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