US 11,699,977 B2
Digital envelop tracker for power amplifier
Stephan Henzler, Munich (DE); Christian Kranz, Ratingen (DE); Otto Schumacher, Dachau (DE); and Bernhard Sogl, Unterhaching (DE)
Assigned to Intel Corporation, Santa Clara, CA (US)
Appl. No. 17/59,489
Filed by Intel Corporation, Santa Clara, CA (US)
PCT Filed Oct. 15, 2019, PCT No. PCT/US2019/056179
§ 371(c)(1), (2) Date Nov. 30, 2020,
PCT Pub. No. WO2020/139443, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 18248077 (EP), filed on Dec. 27, 2018.
Prior Publication US 2021/0376795 A1, Dec. 2, 2021
Int. Cl. H03F 1/02 (2006.01); H03F 3/21 (2006.01)
CPC H03F 1/0216 (2013.01) [H03F 3/21 (2013.01); H03F 2200/105 (2013.01); H03F 2200/171 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A digital envelop tracker circuitry, comprising:
a level selection circuitry configured to determine a level of supply voltage based on a power of an input data stream and generate a level select signal,
wherein the level select signal is generated based on a series of voltage level switching events triggered by each determined level of supply voltage,
wherein the level selection circuitry comprises:
a primary switching circuitry configured to schedule a primary switching event of the switch based on the determined level of supply voltage,
a secondary switching circuitry configured to schedule secondary switching events of the switch at time instances delayed from the primary switching event based on the determined level of supply voltage, and
a combiner configured to combine the primary switching event and previously scheduled secondary switching events to generate the level select signal, and
a switch configured to connect one of a plurality of supply voltages in different levels to a supply filter based on the level select signal.