Multi-input amplifier with variable gain for individual inputs

A front-end architecture comprising:

• a signal amplifier configured to process signals across a plurality of gain modes, the amplifier comprising a multiplexer having a plurality of branches that direct signals from a corresponding plurality of input ports to an output port, each of the plurality of branches including a band selection switch and an attenuation selection branch, the band selection switch having a shunt switch circuit that selectively couples the corresponding input port to a reference potential node, the attenuation selection branch having a variable attenuation circuit;
• and the amplifier further comprising an amplification stage coupled to the output port of the multiplexer, the amplification stage configured to amplify signals received from the multiplexer to provide an amplified output signal, an amplification of the amplification stage or an attenuation of the variable attenuation circuit based on a gain mode of the plurality of gain modes;
• a filter assembly coupled to the amplifier to direct frequency bands to select inputs of the plurality of input ports;
• and
• a controller implemented to control the amplifier to provide the plurality of gain modes.

A wireless device comprising:

• a diversity antenna;
• a filter assembly coupled to the diversity antenna to receive signals and to direct frequency bands along select paths;
• a signal amplifier configured to process signals across a plurality of gain modes, the amplifier comprising a multiplexer having a plurality of branches that direct signals from a corresponding plurality of input ports to an output port, each of the plurality of branches including a band selection switch and an attenuation selection branch, the band selection switch having a shunt switch circuit that selectively couples the corresponding input port to a reference potential node, the attenuation selection branch having a variable attenuation circuit;
• and the amplifier further comprising an amplification stage coupled to the output port of the multiplexer, the amplification stage configured to amplify signals received from the multiplexer to provide an amplified output signal, an amplification of the amplification stage or an attenuation of the variable attenuation circuit based on a gain mode of the plurality of gain modes;
• and
• a controller implemented to control the amplifier to provide the plurality of gain modes.