Electronic device for tuning module for processing radio frequency signal

Patent metadata

Field	Value
Publication number	US-11223332-B2
Application number	US-202016733996-A
Country	US
Kind code	B2
Filing date	Jan 3, 2020
Priority date	Jan 3, 2019
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

Disclosed is an electronic device including a power amplifier (PA) configured to amplify a transmission signal, a matching circuit configured to be connected with the PA and to form a load impedance, a filter configured to be connected with the matching circuit, and a control circuit configured to control a state of at least one of a bias of the PA, the matching circuit, and the filter. The control circuit may identify a network to which the electronic device is connected among a first network and a second network and may operate the matching circuit in one of a first state, a second state, and a third state based on the identified network.

First claim

What is claimed is:

1. An electronic device comprising:
a power amplifier (PA) configured to amplify a transmission signal;
a matching circuit configured to be connected with the PA and to form a load impedance;
a filter configured to be connected with the matching circuit; and
a control circuit configured to control a state of at least one of a bias of the PA, the matching circuit, and the filter,
wherein the matching circuit is configured to operate in one of a first state, a second state, and a third state,
wherein the first state is defined to have a linearity corresponding to a requirement of a first network at a module level,
wherein the second state is defined to have a linearity corresponding to a requirement of a second network at the module level, the first network requiring a higher linearity than the second network,
wherein the third state provides a linearity that is lower than the linearity in the first state and is higher than the linearity in the second state and provides an efficiency that is higher than an efficiency in the first state and is lower than an efficiency in the second state, and
wherein the control circuit is configured to:
identify a network to which the electronic device is connected between the first network and the second network,
control the matching circuit to operate in the first state when the identified network is the first network, and
control the matching circuit to operate in the second state when the identified network is the second network.

2. The electronic device of claim 1 ,
wherein, after controlling the matching circuit to operate in the second state, when a linearity measured with the matching circuit to operate in the second state does not satisfy the requirement of the second network, the control circuit is further configured to control the matching circuit to operate in the third state.

3. The electronic device of claim 2 ,
wherein, after controlling the matching circuit to operate in the third state, when a linearity measured with the matching circuit to operate in the third state does not satisfy the requirement of the second network, the control circuit is further configured to control the matching circuit to operate in the first state.

4. The electronic device of claim 2 ,
wherein, after controlling the matching circuit to operate in the third state, when a linearity measured with the matching circuit to operate in the third state does not satisfy the requirement of the second network, the control circuit is further configured to control the matching circuit to operate in a fourth state, and
wherein the fourth state provides a linearity that is lower than the linearity in the first state and is higher than the linearity in the third state and provides an efficiency that is higher than the efficiency in the first state and is lower than the efficiency in the third state.

5. The electronic device of claim 1 , further comprising:
a coupler configured to couple the transmission signal having passed through the filter,
wherein the control circuit is further configured to measure an in-operation linearity using the signal coupled by the coupler.

6. The electronic device of claim 1 , further comprising:
a digital-to-analog converter (DAC) configured to convert a digital envelope signal into an analog envelope signal;
a linear regulator configured to generate a portion of a bias signal applied to the PA based on the analog envelope signal;
a switching regulator configured to generate a remaining portion of the bias signal; and
a comparator configured to generate a signal to control a switching operation of the switching regulator based on output from the linear regulator and output from the switching regulator,
wherein the DAC, the linear regulator, and the comparator are comprised in a same module as the PA.

7. An electronic device comprising:
a power amplifier (PA) configured to amplify a transmission signal using a plurality of amplifiers connected in parallel;
a matching circuit configured to be connected with the PA and to form a load impedance; and
a control circuit configured to control a state of a bias of the PA or the matching circuit,
wherein the matching circuit is configured to operate in one of a first state, a second state, and a third state,
wherein the first state is defined to have a linearity corresponding to a requirement of a network at a module level and to enable the matching circuit to form a first impedance,
wherein the second state is defined to have the linearity corresponding to the requirement of the network at the module level and to enable the matching circuit to form a second impedance that is higher than the first impedance,
wherein the third state is defined to have the linearity corresponding to the requirement of the network at the module level and to enable the matching circuit to form a third impedance that is higher than the first impedance and is lower than the second impedance, and
wherein the control circuit is configured to:
identify a power mode to be used among a first power mode and a second power mode, the first power mode using a higher transmission power than the second power mode,
control all of the plurality of amplifiers comprised in the PA to be turned on and control the matching circuit to operate in the first state when the identified power mode is the first power mode, and
control a first subset among the plurality of amplifiers comprised in the PA to be turned on and control the matching circuit to operate in the second state when the identified power mode is the second power mode.

8. The electronic device of claim 7 ,
wherein, after controlling the matching circuit to operate in the second state, when a linearity measured with the matching circuit to operate in the second state does not satisfy the requirement of the network, the control circuit is further configured to control a second subset, which comprises a greater number of amplifiers than the first subset among the plurality of amplifiers comprised in the PA, to be turned on and control the matching circuit to operate in the third state.

9. The electronic device of claim 8 ,
wherein, after controlling the matching circuit to operate in the third state, when a linearity measured with the matching circuit to operate in the third state does not satisfy the requirement of the network, the control circuit is further configured to control all the amplifiers comprised in the PA to be turned on and to control the matching circuit to operate in the first state.

10. The electronic device of claim 8 ,
wherein, after controlling the matching circuit to operate in the third state, when a linearity measured with the matching circuit to operate in the third state does not satisfy the requirement of the network, the control circuit is further configured to control a third subset, which comprises a greater number of amplifiers than the second subset among the plurality of amplifiers comprised in the PA, to be turned on and to control the matching circuit to operate in a fourth state, and
wherein the fourth state forms an impedance that is higher than the impedance in the first state and is lower than the impedance in the third state.

11. The electronic device of claim 7 , further comprising:
a digital-to-analog converter (DAC) configured to convert a digital envelope signal into an analog envelope signal;
a linear regulator configured to generate a portion of a bias signal applied to the PA based on the analog envelope signal;
a switching regulator configured to generate a remaining portion of the bias signal; and
a comparator configured to generate a signal to control a switching operation

Assignees

• Samsung Electronics Co Ltd

Inventors

• Choi Hyunseok
• Kim Jooseung
• Lee Youngmin
• Na Hyoseok

Classifications

• H03F2200/111

  the amplifier being a dual or triple band amplifier, e.g. 900 and 1800 MHz, e.g. switched or not switched, simultaneously or not · CPC title

• H03F2200/396

  the output of an amplifier can be switched on or off by a switch to couple the output signal to a load · CPC title

• H03F1/56 Primary

  Modifications of input or output impedances, not otherwise provided for · CPC title

• H04B1/406 Primary

  with more than one transmission mode, e.g. analog and digital modes · CPC title

• H04B1/0458 Primary

  Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages (matching circuits in general H03H) · CPC title