US 11,705,863 B2
Variable gain power amplifiers
Sudipto Chakraborty, Plano, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Jan. 12, 2022, as Appl. No. 17/573,662.
Application 17/573,662 is a continuation of application No. 17/034,099, filed on Sep. 28, 2020, granted, now 11,258,404.
Application 17/034,099 is a continuation of application No. 16/710,239, filed on Dec. 11, 2019, granted, now 10,797,646, issued on Oct. 16, 2020.
Application 16/710,239 is a continuation of application No. 15/627,249, filed on Jun. 19, 2017, granted, now 10,536,113, issued on Jan. 14, 2020.
Application 15/627,249 is a continuation of application No. 14/755,462, filed on Jun. 30, 2015, granted, now 9,685,907, issued on Jun. 20, 2017.
Prior Publication US 2022/0140787 A1, May 5, 2022
Int. Cl. H03F 3/213 (2006.01); H03F 3/24 (2006.01); H03G 3/30 (2006.01); H03B 5/12 (2006.01); H03G 1/00 (2006.01); H03F 3/21 (2006.01); H03F 3/45 (2006.01); H03F 1/02 (2006.01); H03G 3/00 (2006.01); H04B 1/04 (2006.01)
CPC H03B 5/1212 (2013.01) [H03B 5/1228 (2013.01); H03B 5/1265 (2013.01); H03F 1/0211 (2013.01); H03F 1/0277 (2013.01); H03F 3/211 (2013.01); H03F 3/213 (2013.01); H03F 3/245 (2013.01); H03F 3/45 (2013.01); H03G 1/0005 (2013.01); H03G 3/004 (2013.01); H03G 3/3042 (2013.01); H04B 2001/0416 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An integrated circuit comprising:
a coarse gain control circuit that includes:
a coarse gain input coupled to an oscillator;
a coarse gain output;
a coarse gain control input; and
a set of passive devices, including:
a first inductor that includes a first terminal and a second terminal;
a second inductor that includes a third terminal coupled to the second terminal, and a fourth terminal;
a third inductor that includes a fifth terminal coupled to the fourth terminal, and a sixth terminal;
a fourth inductor that includes a seventh terminal coupled to the sixth terminal, and an eighth terminal;
a fifth inductor that includes a ninth terminal coupled to the eighth terminal, and a tenth terminal; and
a sixth inductor that includes an eleventh terminal coupled to the tenth terminal, and a twelfth terminal;
a first amplifier stage that includes:
a first amplifier that includes a first amplifier gain control input, a first amplifier input coupled to the coarse gain output, and a first amplifier output; and
a first power supply that includes a first power supply input and a first power supply output coupled to the first amplifier gain control input; and
a second amplifier stage that includes:
a second amplifier that includes a second amplifier gain control input, a second amplifier input coupled to the first amplifier output, and a second amplifier output; and
a second power supply that includes a second power supply input and a second power supply output coupled to the second amplifier gain control input.