US 12,489,471 B2
Diplexer/multiplexer for carrier aggregation
Anand Raghavan, Middleton, WI (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Dec. 23, 2022, as Appl. No. 18/146,226.
Claims priority of provisional application 63/266,242, filed on Dec. 30, 2021.
Prior Publication US 2023/0216527 A1, Jul. 6, 2023
Int. Cl. H04B 1/00 (2006.01)
CPC H04B 1/0057 (2013.01) 20 Claims
OG exemplary drawing
 
1. A front end for receiving carrier aggregation radio frequency signals, the front end comprising:
an antenna switch module configured to receive a first radio frequency signal in a first band and a second radio frequency signal in a second band from an antenna;
a diplexer including a first filter configured to pass the first band, a second filter configured to pass the second band, and a diplexed node between the first and second filters and coupled to the antenna switch module;
a main amplifier coupled to the diplexed node of the diplexer and configured to amplify radio frequency signals received from the diplexer; and
a transconductance stage coupled to the main amplifier and configured to independently control the gain of the main amplifier for the first band and the second band.