De-multiplexing a radio frequency input signal using output transformer circuitry

摘要

The present disclosure relates to de-multiplexing at least one RF input signal feeding RF power amplifier circuitry to create multiple de-multiplexed RF output signals, which may be used to provide RF transmit signals in an RF communications system. Output transformer circuitry is coupled to outputs from the RF power amplifier circuitry to provide the de-multiplexed RF output signals, which may support multiple modes, multiple frequency bands, or both. The de-multiplexed RF output signals may be used in place of RF switching elements in certain embodiments. As a result, RF front-end switching circuitry in the RF communications system may be simplified, thereby reducing insertion losses, reducing costs, reducing size, or any combination thereof. Additionally, the output transformer circuitry may provide load line transformation, output transistor biasing, or both to the RF power amplifier circuitry.

主权项

1. Radio frequency (RF) circuitry comprising:
differential RF power amplifier circuitry configured to:
receive and amplify a first differential RF input signal to provide a first. differential RF output signal; andreceive and amplify a second differential RF input signal to provide a second differential RF output signal; and output transformer circuitry configured to provide a first transformer output signal and a second transformer output signal, such that:
during a first operating mode, power provided by the first differential RF output signal and power provided by the second differential RF output signal substantially combine to provide power via the first transformer output signal, wherein power provided via the second transformer output signal is essentially zero; andduring a second operating mode, power provided by the first differential RF output signal and power provided by the second differential RF output signal substantially combine to provide power via the second transformer output signal, wherein power provided via the first transformer output signal is essentially zero.