US 12,170,517 B2
Multiplexer including filter with two types of acoustic wave resonators
Yoshiaki Ando, Yokosuka (JP); Yasuyuki Saito, Kadoma (JP); and Hiroyuki Nakamura, Osaka-Fu (JP)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Jul. 25, 2023, as Appl. No. 18/226,127.
Application 18/226,127 is a continuation of application No. 17/364,314, filed on Jun. 30, 2021, granted, now 11,750,174.
Application 17/364,314 is a continuation of application No. 16/373,394, filed on Apr. 2, 2019, granted, now 11,101,787, issued on Aug. 24, 2021.
Claims priority of provisional application 62/656,857, filed on Apr. 12, 2018.
Prior Publication US 2024/0063775 A1, Feb. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 9/70 (2006.01); H03H 9/00 (2006.01); H03H 9/02 (2006.01); H03H 9/10 (2006.01); H03H 9/17 (2006.01); H03H 9/205 (2006.01); H03H 9/25 (2006.01); H03H 9/54 (2006.01); H03H 9/56 (2006.01); H03H 9/64 (2006.01); H03H 9/72 (2006.01); H04L 5/14 (2006.01)
CPC H03H 9/706 (2013.01) [H03H 9/0009 (2013.01); H03H 9/0014 (2013.01); H03H 9/02007 (2013.01); H03H 9/105 (2013.01); H03H 9/1092 (2013.01); H03H 9/171 (2013.01); H03H 9/205 (2013.01); H03H 9/25 (2013.01); H03H 9/54 (2013.01); H03H 9/542 (2013.01); H03H 9/568 (2013.01); H03H 9/64 (2013.01); H03H 9/6483 (2013.01); H03H 9/703 (2013.01); H03H 9/72 (2013.01); H03H 9/725 (2013.01); H04L 5/14 (2013.01)] 20 Claims
OG exemplary drawing
 
11. A method of processing a radio frequency signal, the method comprising:
generating a filtered transmit radio frequency signal with transmit filter having a first stage serially connected with at least a second stage, the first stage including a first plurality of acoustic wave resonators of a first type, the second stage including a second plurality of acoustic wave resonators of a second type that is different than the first type, the second plurality of acoustic wave resonators having a higher suppression of a second harmonic of a radio frequency signal than the first plurality of acoustic wave resonators;
outputting the filtered transmit radio frequency signal to a common node;
filtering a receive radio frequency signal with a receive filter having an input coupled to the common node; and
generating an anti-phase signal to a target signal at a particular frequency with a loop circuit coupled to an output of the receive filter and an input of the transmit filter.