US 12,463,635 B2
Amplifier with output AC coupled envelope tracking supply
Feng Su, San Jose, CA (US); Yue Hu, San Jose, CA (US); Tom W. Kwan, Cupertino, CA (US); Guo Wen Wei, Saratoga, CA (US); Fang Lin, San Jose, CA (US); and Iuri Mehr, Irvine, CA (US)
Assigned to Avago Technologies International Sales Pte. Limited, Singapore (SG)
Filed by Avago Technologies International Sales Pte. Limited, Singapore (SG)
Filed on Jul. 27, 2023, as Appl. No. 18/360,413.
Prior Publication US 2025/0038744 A1, Jan. 30, 2025
Int. Cl. H03K 17/22 (2006.01); H03K 17/687 (2006.01); H03K 19/0185 (2006.01)
CPC H03K 17/223 (2013.01) [H03K 17/687 (2013.01); H03K 19/018514 (2013.01); H03K 19/018585 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system, comprising:
a device including:
a first circuit configured to:
receive a first signal to indicate a first amount of voltage provided by a first source;
receive a second signal to indicate a second amount of voltage provided to a driver; and
provide a third signal having a first level in response to a level of the first signal being larger than a level of the second signal and the third signal having a second level in response to the level of the second signal being larger than the level of the first signal;
a second circuit configured to:
receive a fourth signal to indicate a third amount of voltage provided by the driver;
receive a fifth signal to indicate the second amount of voltage; and
provide a sixth signal having a first level in response to a level of the fourth signal being larger than a level of the fifth signal and the sixth signal having a second level in response to the level of the fifth signal being larger than the level of the fourth signal;
a third circuit configured to:
receive the third signal and the sixth signal; and
provide a seventh signal to indicate whether to:
track a difference between the second amount of voltage and the third amount of voltage; or
track a difference between the first amount of voltage and the second amount of voltage;
a first component configured to electrically couple the driver with the first source in response to the seventh signal having a first level; and
a second component configured to electrically couple the driver with a second source in response to the seventh signal having a second level.