US 11,705,867 B2
Dynamically biased power amplification
Debapriya Sahu, Bangalore (IN); and Rohit Chatterjee, Bangalore (IN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Mar. 9, 2022, as Appl. No. 17/690,415.
Application 17/690,415 is a continuation of application No. 16/180,879, filed on Nov. 5, 2018, granted, now 11,303,248.
Claims priority of provisional application 62/611,813, filed on Dec. 29, 2017.
Prior Publication US 2022/0200534 A1, Jun. 23, 2022
Int. Cl. H03F 1/02 (2006.01); H03F 3/21 (2006.01); H03F 3/193 (2006.01); H03F 3/45 (2006.01); H03H 7/06 (2006.01)
CPC H03F 1/0222 (2013.01) [H03F 3/193 (2013.01); H03F 3/211 (2013.01); H03F 3/45179 (2013.01); H03F 3/45475 (2013.01); H03F 2200/102 (2013.01); H03F 2200/171 (2013.01); H03F 2200/273 (2013.01); H03F 2200/378 (2013.01); H03F 2200/387 (2013.01); H03F 2200/393 (2013.01); H03F 2200/451 (2013.01); H03F 2203/21139 (2013.01); H03F 2203/21157 (2013.01); H03H 7/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device comprising:
a power amplifier configured to amplify a first signal based on a dynamic bias signal to produce an amplified signal at an output; and
a dynamic bias circuit comprising a filter and coupled to the power amplifier, wherein the dynamic bias circuit is configured to:
monitor the first signal;
generate the dynamic bias signal based on an output of the filter; and
output the dynamic bias signal, wherein the dynamic bias circuit comprises:
a first transistor having a current path coupled to the filter via a resistor; and
a second transistor having a current path coupled to the filter via the resistor.