US 12,218,637 B2
Drain switched split amplifier with capacitor switching for noise figure and isolation improvement in split mode
Kashish Pal, Reading (GB); Emre Ayranci, Costa Mesa, CA (US); and Miles Sanner, San Diego, CA (US)
Assigned to pSemi Corporation, San Diego, CA (US)
Filed by pSemi Corporation, San Diego, CA (US)
Filed on Dec. 8, 2023, as Appl. No. 18/534,153.
Application 18/534,153 is a continuation of application No. 17/573,375, filed on Jan. 11, 2022, granted, now 11,848,648.
Application 17/573,375 is a continuation of application No. 15/931,236, filed on May 13, 2020, granted, now 11,239,801, issued on Feb. 1, 2022.
Application 15/931,236 is a continuation of application No. 15/991,980, filed on May 29, 2018, granted, now 10,686,409, issued on Jun. 16, 2020.
Prior Publication US 2024/0186958 A1, Jun. 6, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 1/02 (2006.01); H03F 1/22 (2006.01); H03F 1/26 (2006.01); H03F 3/193 (2006.01); H03F 3/68 (2006.01); H04L 27/26 (2006.01)
CPC H03F 1/223 (2013.01) [H03F 1/26 (2013.01); H03F 3/193 (2013.01); H03F 3/68 (2013.01); H04L 27/2647 (2013.01); H03F 1/0277 (2013.01); H03F 2200/294 (2013.01); H03F 2200/489 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for amplifying a signal comprising:
(a) providing at least two amplifiers, each amplifier including an input transistor and a respective controllable output transistor, each input transistor including a gate configured to receive an applied signal input, a source, and a drain coupled to a source of the respective controllable output transistor;
(b) coupling the drain of the input transistor of a first amplifier of the at least two amplifiers to the drain of the input transistor of a second amplifier of the at least two amplifiers during a first mode of operation, and uncoupling the drains of the input transistors of the first and second amplifiers during a second mode of operation; and
(c) selectively coupling the source of the input transistor of the first amplifier to the source of the input transistor of the second amplifier.