| 摘要 |
A high efficiency, multiple power output power amplifier uses a pair of amplifiers (214, 216) having similar characteristics coupled to a pair of radio frequency RF couplers (204, 222). When both amplifiers (214, 216) are operating, the power output (RF OUTPUT) is the sum of the outputs of the two amplifiers (214, 216). When lower power operation is desired, one of the amplifiers (214, 216) is turned off and a high impedance is presented to the isolated port of the output RF coupler (222), thereby ensuring that all of the power output (RF OUTPUT) of the remaining power amplifier is available for output.
|
