Radio frequency front end with wide channel bandwidth receive sensitivity

A mobile device comprising:

• an antenna;
• a radio frequency integrated circuit;
• and
• a radio frequency module including a duplexer, a receive amplifier, and a post-amplifier receive circuit, the duplexer including an uplink filter and a downlink filter, the downlink filter configured to filter a receive signal received by an antenna and having a passband corresponding to a receive channel of a frequency division duplex communication band, the uplink filter configured to filter an amplified transmit signal for transmission via the antenna and having a passband corresponding to a transmit channel of the frequency division duplex communication band, the receive amplifier configured to amplify the filtered receive signal output by the downlink filter to output an amplified receive signal, and the post-amplifier receive circuit including a first noise filter having a stopband corresponding to the transmit channel, the post-amplifier receive circuit configured to selectively output to the radio frequency integrated circuit either the amplified receive signal or a filtered version of the amplified receive signal filtered by the first noise filter.

A mobile device comprising:

• an antenna;
• a transceiver;
• and
• a front end including a duplexer, a receive amplifier, and a post-amplifier receive circuit, the duplexer including an uplink filter and a downlink filter, the downlink filter configured to filter a receive signal received by an antenna and having a passband corresponding to a receive channel of a frequency division duplex communication band, the uplink filter configured to filter an amplified transmit signal for transmission via the antenna and having a passband corresponding to a transmit channel of the frequency division duplex communication band, the receive amplifier configured to amplify the filtered receive signal output by the downlink filter to output an amplified receive signal, and the post-amplifier receive circuit including a first noise filter having a stopband corresponding to the transmit channel, the post-amplifier receive circuit configured to selectively output to the transceiver either the amplified receive signal or a filtered version of the amplified receive signal filtered by the first noise filter.