US 12,249,961 B2
Wide bandwidth power amplifier apparatus
Nadim Khlat, Cugnaux (FR)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Feb. 10, 2022, as Appl. No. 17/668,458.
Prior Publication US 2023/0253922 A1, Aug. 10, 2023
Int. Cl. H03F 1/02 (2006.01); H03F 3/189 (2006.01); H03F 3/20 (2006.01)
CPC H03F 1/02 (2013.01) [H03F 3/189 (2013.01); H03F 3/20 (2013.01); H03F 2200/102 (2013.01); H03F 2200/451 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wide bandwidth power amplifier apparatus comprising:
a power amplifier circuit configured to amplify a radio frequency (RF) signal based on a modulated voltage and a modulated current; and
an envelope tracking (ET) integrated circuit (ETIC) comprising:
a voltage circuit coupled to the power amplifier circuit and configured to generate the modulated voltage and a high-frequency current as part of the modulated current;
a primary switcher circuit coupled to the power amplifier circuit and configured to generate a low-frequency current as part of the modulated current;
an auxiliary switcher circuit configured to generate an auxiliary current; and
a control circuit configured to:
cause the auxiliary switcher circuit to provide the auxiliary current to the power amplifier circuit as part of the modulated current when a bandwidth of the modulated voltage is higher than or equal to a bandwidth threshold; and
cause the auxiliary switcher circuit not to provide the auxiliary current to the power amplifier circuit when the bandwidth of the modulated voltage is lower than the bandwidth threshold.