US 11,962,278 B2
Programmable baseband filter for selectively coupling with at least a portion of another filter
Ahmed Abbas Mohamed Helmy, San Diego, CA (US); Mehran Bakhshiani, San Diego, CA (US); Francesco Gatta, San Diego, CA (US); Hasnain Lakdawala, San Diego, CA (US); Rahul Karmaker, San Diego, CA (US); and Shankar Guhados, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on May 12, 2021, as Appl. No. 17/318,959.
Claims priority of provisional application 63/045,813, filed on Jun. 29, 2020.
Prior Publication US 2021/0408989 A1, Dec. 30, 2021
Int. Cl. H03F 3/45 (2006.01); H03G 3/30 (2006.01); H03H 11/12 (2006.01); H03H 19/00 (2006.01); H04B 1/00 (2006.01); H04B 1/16 (2006.01); H04B 1/18 (2006.01)
CPC H03F 3/45475 (2013.01) [H03G 3/30 (2013.01); H03H 11/1226 (2013.01); H03H 19/004 (2013.01); H04B 1/0032 (2013.01); H04B 1/0039 (2013.01); H04B 1/0042 (2013.01); H04B 1/0078 (2013.01); H04B 1/1615 (2013.01); H04B 1/18 (2013.01); H03F 2200/129 (2013.01); H03F 2200/165 (2013.01); H03F 2203/45526 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a first filter comprising a first amplifier, the first amplifier comprising a first resistor-capacitor (RC) feedback network coupled between an input and output of the first amplifier;
a second filter comprising a second amplifier, the second amplifier comprising a second RC feedback network selectively coupled between an input and output of the second amplifier;
a first set of one or more switching devices configured to selectively couple the first filter to the second filter, wherein the first set of one or more switching devices is configured to selectively couple inputs and outputs of the first and second amplifiers together; and
a second set of one or more switching devices configured to selectively couple the first and second RC feedback networks to capacitors of a capacitor bank.