US 12,224,711 B2
Target voltage generation in an envelope tracking integrated circuit
Nadim Khlat, Cugnaux (FR)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Nov. 11, 2021, as Appl. No. 17/523,966.
Claims priority of provisional application 63/185,948, filed on May 7, 2021.
Prior Publication US 2022/0360225 A1, Nov. 10, 2022
Int. Cl. H03F 1/02 (2006.01); H03F 3/19 (2006.01)
CPC H03F 1/0216 (2013.01) [H03F 3/19 (2013.01); H03F 2200/105 (2013.01); H03F 2200/375 (2013.01); H03F 2200/451 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An envelope tracking (ET) integrated circuit (ETIC) comprising:
an ET voltage circuit configured to:
generate a time-variant ET voltage based on a time-variant target voltage for amplifying a radio frequency (RF) signal in a plurality of time intervals; and
generate a sensed signal having a time-variant sensed envelope that tracks a high-frequency current flowing inside the ET voltage circuit and varying in accordance with a time-variant power envelope of the RF signal; and
a target voltage generation circuit configured to generate the time-variant target voltage based on the time-variant sensed envelope to thereby cause the time-variant ET voltage to track the time-variant power envelope of the RF signal.