US 11,973,471 B2
Method and system for process and temperature compensation in a transimpedance amplifier using a dual replica
Stefan Barabas, West Melbourne, FL (US); Joseph Balardeta, Encinitas, CA (US); Simon Pang, San Diego, CA (US); and Scott Denton, Escondido, CA (US)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Jan. 24, 2023, as Appl. No. 18/158,791.
Application 18/158,791 is a continuation of application No. 17/071,950, filed on Oct. 15, 2020, granted, now 11,588,445.
Application 17/071,950 is a continuation of application No. 16/429,952, filed on Jun. 3, 2019, granted, now 10,855,229, issued on Dec. 1, 2020.
Application 16/429,952 is a continuation of application No. 14/997,940, filed on Jan. 18, 2016, granted, now 10,312,866, issued on Jun. 4, 2019.
Claims priority of provisional application 62/125,292, filed on Jan. 16, 2015.
Prior Publication US 2023/0163729 A1, May 25, 2023
Int. Cl. H03F 1/30 (2006.01); H01L 31/02 (2006.01); H01L 31/09 (2006.01); H03F 1/08 (2006.01); H03F 1/56 (2006.01); H03F 3/08 (2006.01); H03G 3/30 (2006.01)
CPC H03F 1/30 (2013.01) [H01L 31/02016 (2013.01); H01L 31/09 (2013.01); H03F 1/086 (2013.01); H03F 1/301 (2013.01); H03F 1/56 (2013.01); H03F 3/08 (2013.01); H03F 3/082 (2013.01); H03F 3/087 (2013.01); H03G 3/3084 (2013.01); H03F 2200/129 (2013.01); H03F 2200/132 (2013.01); H03F 2200/156 (2013.01); H03F 2200/453 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
configuring a first gain level of a first TIA (transimpedance amplifier), wherein the first gain level comprises a constant gain level;
dynamically configuring a second gain level of a second TIA and a third TIA via respective active feedback impedances based on a control voltage; and
amplifying a received electrical current to generate an output voltage using the third TIA according to the second gain level.