Transmitters and methods for operating the same
AssigneeIntel Corporation
InventorAlexander Belitzer
Life of this patent
Estimating the term…
Abstract
A transmitter is provided. The transmitter includes a bus system including at least two bus lines. Further, the transmitter includes an envelope tracking circuit coupled to the at least two bus lines, and a plurality of power amplifiers. At least a first one of the plurality of power amplifiers, while in active state, is configured to selectively couple its input to the one of the at least two bus lines which is supplied with a supply voltage or a bias signal by the envelope tracking circuit that is based on an envelope of a first baseband signal related to a first radio frequency signal received by the first one of the plurality of power amplifiers for amplification.
Claims22
A transmitter, comprising:
- a bus system comprising a number of bus lines,
- [wherein the number of bus lines is equal to the maximum supported number of power amplifiers simultaneously operated in an active state,
- wherein the maximum supported number of power amplifiers simultaneously operated in an active state is at least two;]
- an envelope tracking circuit coupled to the number of bus lines,
- a filter coupled between the envelope tracking circuit and each of the number of bus lines;
- and
- a plurality of power amplifiers,
- wherein at least a first one of the plurality of power amplifiers, while in active state, is configured to selectively couple its input to one of the number of bus lines which is supplied with a supply voltage or a bias signal by the envelope tracking circuit that is based on an envelope of a first baseband signal related to a first radio frequency signal received by the first one of the plurality of power amplifiers;
- and
- wherein the number of bus lines is equal to a maximum supported number of the plurality of power amplifiers simultaneously operated in an active state, and
- wherein the maximum supported number of the plurality power amplifiers simultaneously operated in an active state is at least two.
A transmitter, comprising:
- a bus system comprising at least a first bus line and a second bus line;
- an envelope tracking circuit configured to simultaneously supply one of a first supply voltage and a first bias signal to the first bus line and one of a second supply voltage and a second bias signal to the second bus line;
- and
- a plurality of power amplifiers,
- wherein, if a first power amplifier of the plurality of power amplifiers receives a first radio frequency signal for amplification, the first power amplifier is configured to:
- selectively couple its input to the first bus line, if the one of the first supply voltage and the first bias signal is based on an envelope of a first baseband signal related to the first radio frequency signal;
- and
- selectively couple its input to the second bus line, if the one of the second supply voltage and the second bias signal is based on the envelope of the first baseband signal.
A method for operating a transmitter, wherein the transmitter comprises a bus system comprising at least two bus lines, an envelope tracking circuit coupled to the at least two bus lines, a filter coupled between the envelope tracking circuit and each of the at least two bus lines, and a plurality of power amplifiers, the method comprising:
- for at least a first one of the plurality of power amplifiers, selectively coupling its input in an active state to one of the at least two bus lines which is supplied with a supply voltage or a bias signal by the envelope tracking circuit that is based on an envelope of a first baseband signal related to a first radio frequency signal received by the first one of the plurality of power amplifiers for amplification and
- if the first one of the plurality of power amplifiers is in an inactive state, coupling a high impedance terminal of the first one of the plurality of power amplifiers to the one of the at least two bus lines.
A method for operating a transmitter, wherein the transmitter comprises an envelope tracking circuit, a plurality of power amplifiers, and a bus system comprising at least a first bus line and a second bus line, the method comprising:
- simultaneously supplying one of a first supply voltage and a first bias signal to the first bus line and one of a second supply voltage and a second bias signal to the second bus line using the envelope tracking circuit;
- and
- if a first power amplifier of the plurality of power amplifiers receives a first radio frequency signal for amplification:
- selectively coupling the first power amplifier's input to the first bus line, if the one of the first supply voltage and the first bias signal is based on an envelope of a first baseband signal related to the first radio frequency signal;
- and
- selectively coupling the first power amplifier's input to the second bus line, if the one of the second supply voltage and the second bias signal is based on the envelope of the first baseband signal.
Dependencies are inferred from the claim text.