Switched amplifiers

Various embodiments of switched amplifiers are disclosed herein. In some embodiments, a switched amplifier may include a first amplifier; a second amplifier; an input matching network common to both the first and second amplifiers; and at least one switch to couple an input of the switched amplifier, via the input matching network, to one of the first amplifier or the second amplifier. In some embodiments, a switched amplifier may include a first amplifier; a second amplifier; an input matching network common to both the first and second amplifiers or an output matching network common to both the first and second amplifiers; and a bias generation circuit to selectively (1) provide a first bias current to the first amplifier or (2) provide a second bias current to the second amplifier, wherein the second bias current is less than the first bias current. 本文公开了开关放大器的各种实施例。在些实施例中，开关放大器可以包括第放大器；第二放大器；所述第放大器和所述第二放大器共用的输入匹配网络；以及至少个开关，用于经由输入匹配网络将开关放大器的输入耦合到第放大器或第二放大器中的个。在些实施例中，开关放大器可以包括第放大器；第二放大器；所述第和第二放大器共用的输入匹配网络或者