US 11,923,806 B2
Systems and methods for providing an envelope tracking supply voltage
Nadim Khlat, Cugnaux (FR)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Jun. 18, 2021, as Appl. No. 17/351,768.
Claims priority of provisional application 63/064,773, filed on Aug. 12, 2020.
Claims priority of provisional application 63/064,784, filed on Aug. 12, 2020.
Claims priority of provisional application 63/090,566, filed on Oct. 12, 2020.
Claims priority of provisional application 63/090,574, filed on Oct. 12, 2020.
Claims priority of provisional application 63/090,583, filed on Oct. 12, 2020.
Claims priority of provisional application 63/112,430, filed on Nov. 11, 2020.
Prior Publication US 2022/0052650 A1, Feb. 17, 2022
Int. Cl. H03F 3/45 (2006.01); H03F 1/02 (2006.01); H03F 1/32 (2006.01); H03F 1/56 (2006.01); H03F 3/195 (2006.01); H03F 3/21 (2006.01); H03F 3/24 (2006.01)
CPC H03F 1/0233 (2013.01) [H03F 1/0227 (2013.01); H03F 1/3241 (2013.01); H03F 1/3258 (2013.01); H03F 1/56 (2013.01); H03F 3/195 (2013.01); H03F 3/21 (2013.01); H03F 3/245 (2013.01); H03F 2200/102 (2013.01); H03F 2200/105 (2013.01); H03F 2200/451 (2013.01); H03F 2201/3209 (2013.01)] 16 Claims
OG exemplary drawing
 
1. Envelope synchronization circuitry comprising:
a target voltage input at which a target voltage is provided;
an inverted target voltage input at which an inverted version of the target voltage is provided;
an operational amplifier comprising an inverting input, a non-inverting input coupled to a fixed potential, and an output at which an adjusted target supply voltage is provided;
a first adjustable resistor coupled between the target voltage input and the inverting input of the operational amplifier;
a second adjustable resistor coupled between the inverting input of the operational amplifier and the output of the operational amplifier;
a capacitor coupled between the inverting input and an intermediate node;
a first switch coupled between the intermediate node and the target voltage input; and
a second switch coupled between the inverted target voltage input and the intermediate node.