Patent ID: 10516428

Abstract:
A radio frequency front-end (RFFE) slave circuit and related apparatus are provided. The RFFE slave circuit may be coupled to a number of RFFE masters over an RFFE bus. The RFFE slave circuit may be configured by the RFFE masters for accessing, either concurrently or alternately, a number of sharable circuits in an envelope tracking (ET) circuit. The RFFE slave circuit may include common configuration circuitry configured to set a common configuration parameter(s) for a concurrently sharable circuit(s) in the ET circuit. The RFFE slave circuit may include private configuration circuitry configured to set a private configuration parameter(s) for an alternately sharable circuit(s) in the ET circuit. By employing the RFFE slave circuit to set the common and/or private configuration parameter(s) for the ET circuit, it may be possible to reduce processing delays in the RFFE bus, thus helping to improve efficiency of the ET circuit and/or the power amplifier(s).