A power amplifier circuit arrangement including a power amplifier, and a bypass network for bypassing an RF-input signal around the power amplifier when excess gain and output power are not needed. When the bypass network is used, the power amplifier is turned off. A circulator connects the bypass network...http://www.google.de/patents/US6060949?utm_source=gb-gplus-sharePatent US6060949 - High efficiency switched gain power amplifier
