US 12,301,191 B2
Gain stage degeneration inductor switching without the use of switches
Junhyung Lee, Irvine, CA (US); and Johannes Jacobus Emile Maria Hageraats, Kamuela, HI (US)
Assigned to SKYWORKS SOLUTIONS, INC., Carlsbad, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Dec. 30, 2021, as Appl. No. 17/566,324.
Claims priority of provisional application 63/132,920, filed on Dec. 31, 2020.
Prior Publication US 2022/0255519 A1, Aug. 11, 2022
Int. Cl. H03G 3/30 (2006.01); H03F 1/22 (2006.01); H03F 3/72 (2006.01); H03G 1/00 (2006.01); H03G 3/12 (2006.01); H04B 1/00 (2006.01)
CPC H03G 3/3026 (2013.01) [H03F 3/72 (2013.01); H03G 1/0029 (2013.01); H04B 1/0053 (2013.01); H03F 1/22 (2013.01); H03F 2200/294 (2013.01); H03G 3/12 (2013.01); H03G 2201/103 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A variable-gain signal amplifier comprising:
a variable-gain stage configured to receive an input signal and generate an amplified output signal, the variable-gain stage including a plurality of gain stages and an isolation switch that isolates inputs to each of the plurality of gain stages; and
a degeneration matrix coupled to the variable-gain stage and configured to provide a plurality of tailored impedance levels for the variable-gain stage depending on a path through the variable-gain stage, the degeneration matrix not including any switches.