Load compensation in RF amplifiers
First Claim
Patent Images
1. A circuital arrangement comprising:
- 1) a power supply unit;
2) a plurality of power amplifier units, each configured to receive power from a common output port of the power supply unit, each configured to amplify an input radio frequency (RF) signal at an input port of the each power amplifier unit in correspondence of a different frequency band and/or mode of operation of a plurality of different frequency bands and/or modes of operation, and each comprising;
a) an RF amplifier comprising;
i) an output port in correspondence of an output transistor of the RF amplifier, wherein the output port is operatively coupled to the common output port of the power supply unit;
ii) an input port in correspondence of an input transistor of the RF amplifier, wherein the input port is connected to the input port of the each power amplifier unit, andb) an output match network coupled to the output port in correspondence of the output transistor at a first port of the output match network,wherein;
during an activated state of the power amplifier unit, the output match network is coupled via a second port of the output match network to an output load of the circuital arrangement, and an amplified RF signal in correspondence of the input RF signal and a current flow from the power supply unit through the output transistor is provided to the output load, andduring a deactivated state of the power amplifier unit, the output match network is decoupled from the output load of the circuital arrangement and no current flows from the power supply unit through the output transistor;
and3) one or more decoupling circuits, wherein;
during operation of the circuital arrangement, one or more of the plurality of power amplifier units are deactivated,each of the one or more decoupling circuits is configured to remove a loading effect of the one or more deactivated power amplifier units on the common output port of the power supply unit.
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Abstract
Methods and systems for reducing parasitic loading on a power supply output in RF amplifier arrangements used in multiband and/or multitude RF circuits are presented. Such RF circuits can comprise a plurality of RF amplifiers of which only one is activated for a given desired transmission mode and/or band.
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Citations
44 Claims
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1. A circuital arrangement comprising:
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1) a power supply unit; 2) a plurality of power amplifier units, each configured to receive power from a common output port of the power supply unit, each configured to amplify an input radio frequency (RF) signal at an input port of the each power amplifier unit in correspondence of a different frequency band and/or mode of operation of a plurality of different frequency bands and/or modes of operation, and each comprising; a) an RF amplifier comprising; i) an output port in correspondence of an output transistor of the RF amplifier, wherein the output port is operatively coupled to the common output port of the power supply unit; ii) an input port in correspondence of an input transistor of the RF amplifier, wherein the input port is connected to the input port of the each power amplifier unit, and b) an output match network coupled to the output port in correspondence of the output transistor at a first port of the output match network, wherein; during an activated state of the power amplifier unit, the output match network is coupled via a second port of the output match network to an output load of the circuital arrangement, and an amplified RF signal in correspondence of the input RF signal and a current flow from the power supply unit through the output transistor is provided to the output load, and during a deactivated state of the power amplifier unit, the output match network is decoupled from the output load of the circuital arrangement and no current flows from the power supply unit through the output transistor; and 3) one or more decoupling circuits, wherein; during operation of the circuital arrangement, one or more of the plurality of power amplifier units are deactivated, each of the one or more decoupling circuits is configured to remove a loading effect of the one or more deactivated power amplifier units on the common output port of the power supply unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A circuital arrangement comprising:
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1) a variable power supply unit; 2) a plurality of power amplifier units, each configured to receive power from a common output port of the power supply unit, each configured to amplify an input radio frequency (RF) signal at an input port of the each power amplifier unit in correspondence of a different frequency band and/or mode of operation of a plurality of different frequency bands and/or modes of operation, and each comprising; a) an RF amplifier comprising; i) an output port in correspondence of an output transistor of the RF amplifier, wherein the output port is operatively coupled to the common output port of the power supply unit; ii) an input port in correspondence of an input transistor of the RF amplifier, wherein the input port is connected to the input port of the each power amplifier unit, and b) an output match network coupled to the output port in correspondence of the output transistor at a first port of the output match network, wherein; during an activated state of the power amplifier unit, the output match network is coupled via a second port of the output match network to an output load of the circuital arrangement, and an amplified RF signal in correspondence of the input RF signal and a current flow from the power supply unit through the output transistor is provided to the output load, and during a deactivated state of the power amplifier unit, the output match network is decoupled from the output load of the circuital arrangement and no current flows from the power supply unit through the output transistor; and 3) a load compensation circuit, wherein; during operation of the circuital arrangement, one or more of the plurality of power amplifier units are deactivated, and the load compensation circuit is configured to control the variable power supply unit such as to compensate a loading effect of the one or more deactivated power amplifier units on the common output port of the power supply unit. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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33. A method for reducing loading of a power supply unit in a multi-mode and/or multi-band power amplifier arrangement, the method comprising:
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providing a power supply unit; providing a plurality of power amplifier units; connecting the plurality of power amplifier units to a common output port of the power supply unit; selecting a band and/or mode of operation of the amplifier arrangement; based on the selecting, activating a corresponding power amplifier unit of the plurality of power amplifier units; based on the selecting, deactivating one or more power amplifier units of the plurality of power amplifier units; based on the deactivating, decoupling the one or more deactivated power amplifier units from the power supply unit, and based on the decoupling, reducing a loading effect of the one or more deactivated power amplifier units on the power supply unit. - View Dependent Claims (34, 35, 36, 37)
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38. A method for compensating loading of a power supply unit in a multi-mode and/or multi-band power amplifier arrangement, the method comprising:
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providing a variable power supply unit; providing a plurality of power amplifier units; connecting the plurality of power amplifier units to a common output port of the power supply unit; selecting a band and/or mode of operation of the amplifier arrangement; based on the selecting, activating a corresponding power amplifier unit of the plurality of power amplifier units; based on the selecting, deactivating one or more power amplifier units of the plurality of power amplifier units, and based on the deactivating and the activating, compensating a characteristic of a variable output signal at the common output port of the variable power supply unit, wherein the compensating further comprises; based on the deactivating and the activating, providing a mapping function for compensating the characteristic of the variable output signal; providing a control signal for the variable power supply unit in correspondence of a desired variable output signal for the activated power supply unit; applying the mapping function on the control signal; based on the applying, obtaining a compensated control signal; feeding the compensated control signal to the variable power supply unit, and based on the feeding, obtaining the desired variable output signal. - View Dependent Claims (39, 40)
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41. A circuital arrangement comprising:
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a power supply unit; a plurality of power amplifier units, wherein two or more power amplifier units of the plurality of power amplifier units are configured to receive power from a common output port of the power supply unit, and to amplify an input radio frequency (RF) signal at an input port of the two or more power amplifier units in correspondence of a different frequency band and/or mode of operation of a plurality of different frequency bands and/or modes of operation, and a plurality of decoupling switches, wherein each of the two or more power amplifier units comprises; an RF amplifier comprising; an output port in correspondence of an output transistor of the RF amplifier, wherein the output port is operatively coupled to the common output port of the power supply unit; an input port in correspondence of an input transistor of the RF amplifier, wherein the input port is connected to the input port of the each power amplifier unit, and an output match network coupled to the output port in correspondence of the output transistor at a first port of the output match network, and connected to a first decoupling switch port of a decoupling switch of the plurality of decoupling switches at a second port of the output match network, wherein a second decoupling switch port of the decoupling switch is connected to a reference ground, wherein a third port of an output match network of a power amplifier unit of the two or more power amplifier units is configured to provide an amplified version of an input RF signal to the power amplifier unit of the two or more power amplifier units. - View Dependent Claims (43)
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42. A circuital arrangement comprising:
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a power supply unit; a plurality of power amplifier units, wherein two or more power amplifier units of the plurality of power amplifier units are configured to receive power from a common output port of the power supply unit, and to amplify an input radio frequency (RF) signal at an input port of the two or more power amplifier units in correspondence of a different frequency band and/or mode of operation of a plurality of different frequency bands and/or modes of operation, and a decoupling switch connected to the common output port at a first terminal of the decoupling switch and configured to connect the first terminal to any one of a second terminal of a plurality of second terminals of the decoupling switch, wherein each of the two or more power amplifier units comprises; an RF amplifier comprising; an output port in correspondence of an output transistor of the RF amplifier, wherein the output port is operatively coupled to a second terminal of the plurality of second terminals of the decoupling switch; an input port in correspondence of an input transistor of the RF amplifier, wherein the input port is connected to the input port of the each power amplifier unit, and an output match network coupled to the output port in correspondence of the output transistor at a first port of the output match network, and connected to a reference ground at a second port of the output match network, wherein a third port of an output match network of a power amplifier unit of the plurality of power amplifier units is configured to provide an amplified version of an input RF signal to the power amplifier unit of the plurality of power amplifier units. - View Dependent Claims (44)
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Specification