US 12,483,205 B2
Power amplifier junction temperature clamp
Philip John Lehtola, Cedar Rapids, IA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Sep. 28, 2022, as Appl. No. 17/955,345.
Claims priority of provisional application 63/249,856, filed on Sep. 29, 2021.
Prior Publication US 2023/0112095 A1, Apr. 13, 2023
Int. Cl. H03F 3/45 (2006.01); H03F 1/52 (2006.01); H03F 3/24 (2006.01)
CPC H03F 1/52 (2013.01) [H03F 3/245 (2013.01); H03F 2200/451 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A clamp circuit comprising:
a first diode stack comprising one or more diodes; and
an array comprising:
a second diode stack comprising one or more diodes; and
a comparator configured to compare a first voltage at the first diode stack to a second voltage at the second diode stack, the comparator including a first voltage source, a first transistor, a second transistor, a third transistor, and a fourth transistor, a base of the third transistor being coupled to a base of the fourth transistor.