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1. EP3675355 - DIGITAL ENVELOP TRACKER FOR POWER AMPLIFIER

Office
European Patent Office
Application Number 18248077
Application Date 27.12.2018
Publication Number 3675355
Publication Date 01.07.2020
Publication Kind A1
IPC
H03F 1/02
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H03F 3/19
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
189High-frequency amplifiers, e.g. radio frequency amplifiers
19with semiconductor devices only
H03F 3/21
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21with semiconductor devices only
CPC
H03F 1/0227
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
0205in transistor amplifiers
0211with control of the supply voltage or current
0216Continuous control
0222by using a signal derived from the input signal
0227using supply converters
H03F 1/025
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
0205in transistor amplifiers
0211with control of the supply voltage or current
0244Stepped control
025by using a signal derived from the input signal
H03F 3/19
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
189High frequency amplifiers, e.g. radio frequency amplifiers
19with semiconductor devices only
H03F 3/21
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21with semiconductor devices only
Applicants INTEL CORP
Inventors HENZLER STEPHAN
KRANZ CHRISTIAN
SCHUMACHER OTTO
SOGL BERNHARD
Designated States
Priority Data 18248077 27.12.2018 EP
Title
(DE) DIGITALER HÜLLKURVENVERFOLGER FÜR LEISTUNGSVERSTÄRKER
(EN) DIGITAL ENVELOP TRACKER FOR POWER AMPLIFIER
(FR) DISPOSITIF NUMÉRIQUE DE SUIVI D'ENVELOPPES POUR AMPLIFICATEUR DE PUISSANCE
Abstract
(EN)
A digital envelop tracker for a power amplifier. The digital envelop tracker includes a supply filter for filtering a supply voltage to a power amplifier, a level selection circuitry configured to determine a level of supply voltage based on an instantaneous power of an input data stream, schedule a series of switching events based on the determined level of supply voltage, and generate a level select signal based on the scheduled series of switching events, and a switch for connecting one of supply voltages to the supply filter based on the level select signal. The level selection circuitry schedules a primary switching event of the switch based on the determined level of supply voltage and secondary switching events of the switch delayed with respect to the primary switching event based on the determined level of supply voltage to generate a filter response of the supply filter with smaller peaking.

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