US Patent 11764738 Segmented power amplifier arrangements with feedforward adaptive bias circuits

Segmented power amplifier (PA) arrangements are disclosed. An example PA arrangement includes at least first and second PA segments, each having a respective combination of a PA and a feedforward adaptive bias circuit, configured to generate a bias signal for the corresponding PA. Each bias signal has a first DC component, at least one tone component, and at least one harmonic of the at least one tone component. The PA arrangement further includes a power splitting circuit, configured to split an input signal for the PA arrangement into a first PA input signal for the first PA segment and a second PA input signal for the second PA segment, where a power of the first PA input signal is greater than a power of the second PA input signal.