CN110661543B - Mobile phone device, radio frequency transceiver circuit and impedance adjusting device - Google Patents
Mobile phone device, radio frequency transceiver circuit and impedance adjusting device Download PDFInfo
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Abstract
A handset device, a radio frequency transceiver circuit and an impedance adjusting device. The invention discloses a mobile phone device. The mobile phone device comprises a baseband processor, an antenna, a duplexer and a radio frequency transceiver circuit. The antenna is used for receiving and transmitting radio frequency signals. The duplexer is electrically connected to the antenna. The radio frequency transceiver circuit is respectively connected to the baseband processor and the duplexer. The radio frequency transceiver circuit comprises a first power amplifier and an impedance adjusting device. The first power amplifier has a first output impedance. The impedance adjusting device is electrically connected between the first power amplifier and the duplexer and comprises at least one switch, wherein the baseband processor is connected with and controls the at least one switch of the impedance adjusting device to adjust the impedance value of the impedance adjusting device so as to enable the first load impedance of the first power amplifier to be matched with the first output impedance.
Description
The present application is a divisional application of the invention patent application entitled "handset device, radio frequency transceiver circuit and impedance adjusting device" with application number 201510424768.6.
Technical Field
The present invention relates to an impedance adjusting apparatus, and more particularly, to an impedance adjusting apparatus applied to matching different power amplifiers.
Background
In a typical mobile communication device, matching impedance networks of power amplifiers in radio frequency circuits, such as wideband pulse amplitude modulation power amplifiers, are matched in a customized manner. Once a different power amplifier needs to be replaced, the customized matching impedance network must be replaced. This increases the production cost. In view of the above, the present invention provides an impedance adjusting apparatus and a mobile phone apparatus using the same.
Disclosure of Invention
An embodiment of the present invention provides a mobile phone device. The mobile phone device comprises a baseband processor, an antenna, a duplexer and a radio frequency transceiver circuit. The antenna is used for receiving and transmitting a plurality of radio frequency signals. The duplexer is electrically connected to the antenna. The radio frequency transceiver circuit is respectively connected to the baseband processor and the duplexer. The radio frequency transceiver circuit comprises a first power amplifier and an impedance adjusting device. The first power amplifier has a first output impedance. The impedance adjusting device is electrically connected between the first power amplifier and the duplexer, and comprises at least one switch, wherein the baseband processor is connected with and controls the at least one switch of the impedance adjusting device to adjust an impedance value of the impedance adjusting device, so that a first load impedance of the first power amplifier is matched with the first output impedance.
An embodiment of the present invention provides a radio frequency transceiver circuit. The radio frequency transceiver circuit comprises a first power amplifier and an impedance adjusting device. The first power amplifier has a first output impedance. The impedance adjusting device is electrically connected to the first power amplifier and comprises at least one switch, wherein the impedance adjusting device controls the at least one switch according to a first control signal received from a baseband processor to adjust an impedance value of the impedance adjusting device, so that a first load impedance of the first power amplifier is matched with the first output impedance.
An embodiment of the present invention provides an impedance adjusting apparatus, which is suitable for matching a first power amplifier or a second power amplifier. The impedance adjusting device comprises a first switch and a second switch. The first and second switches are used for switching an impedance value of the impedance adjusting device to a first impedance value or a second impedance value, wherein the impedance adjusting device switches the impedance value to the first impedance value according to a first control signal received from a baseband processor to adjust a first load impedance of the first power amplifier, so that the first load impedance is matched with a first output impedance of the first power amplifier.
Drawings
Fig. 1A and 1B are block diagrams illustrating a handset device 10 according to a first embodiment of the present invention.
Fig. 2A and 2B are block diagrams illustrating a radio-frequency transceiver circuit 20 according to a second embodiment of the present invention.
Fig. 3A and 3B are block diagrams illustrating an impedance adjusting apparatus 30 according to a third embodiment of the present invention.
Detailed Description
Illustrative embodiments or examples of the disclosure will be described below. The scope of the present disclosure is not limited thereto. Those skilled in the art should appreciate that they may make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure. In embodiments of the present disclosure, reference numerals may be used repeatedly, and several embodiments of the present disclosure may share the same reference numerals, but feature elements used for one embodiment are not necessarily used for another embodiment.
Fig. 1A and 1B are block diagrams illustrating a mobile phone device 10 according to a first embodiment of the present invention. In the first embodiment of the present invention, as shown in fig. 1A, the handset device 10 includes an antenna 110, a duplexer 120, a radio frequency transceiver circuit 130, and a baseband processor 140. The antenna 110 is used for transceiving a plurality of radio frequency signals. The duplexer 120 is electrically connected to the antenna 110 and the rf transceiver circuit 130, respectively. The radio frequency transceiver circuit 130 is electrically connected to the baseband processor 140. In the first embodiment of the present invention, the rf transceiver circuit 130 includes an rf processing circuit 131, a low noise amplifier 132, a first power amplifier 133, and an impedance adjusting device 134. The lna 132 is used to filter out noise in the rf signal received by the antenna 110. The first power amplifier 133 is used for amplifying the power of the rf signal and outputting the amplified rf signal to the antenna, and has a first output impedance. The impedance adjusting device 134 is electrically connected between the first power amplifier 133 and the duplexer 120. The impedance adjusting device 134 is an array of variable capacitors, inductors, and at least one switch, and has an adjustable impedance value. In the first embodiment of the present invention, the rf processing circuit 131 includes a mixer circuit, an oscillator circuit, an IQ modulator circuit, a phase locked loop, a frequency down converter circuit, an IQ demodulator circuit, and other related rf analog circuits.
In the first embodiment of the present invention, the baseband processor 140 is connected to the impedance adjusting device 134 and controls the at least one switch of the impedance adjusting device 134 to adjust an impedance value of the impedance adjusting device 134. In the first embodiment of the present invention, a first load impedance of the first power amplifier 133 is an equivalent impedance of the impedance adjusting device 134 plus an equivalent impedance of the next stage duplexer 120. Therefore, the baseband Processor 140 controls the at least one switch of the impedance adjusting device 134 through a Mobile Industry Processor Interface (MIPI) thereof to adjust the impedance value of the impedance adjusting device 134, for example, to send a first control signal to the impedance adjusting device 134, so as to match a first load impedance and the first output impedance of the first power amplifier 133. At this time, the first output impedance is equal to the conjugate impedance of the first load impedance, so that the energy transferred to the first load impedance by the first power amplifier 133 is the maximum. In addition, in the first embodiment of the present invention, the designer may calculate the impedance value of the impedance adjusting device 134 required for matching the first output impedance in advance according to the smith original image.
In the first embodiment of the present invention, as shown in fig. 1B, when the designer of the mobile phone apparatus 10 replaces the first power amplifier 133 in the mobile phone apparatus 10 with the second power amplifier 135 based on design considerations, for example, replaces the power amplifier of another frequency band based on frequency band considerations, the designer of the mobile phone apparatus 10 sets the baseband processor 140 so that the baseband processor 140 sends a second control signal to the impedance adjusting apparatus 134. At this time, the impedance adjusting device 134 adjusts the impedance value of the impedance adjusting device 134 according to the second control signal, so that a second load impedance of the second power amplifier 135 and a second output impedance of the second power amplifier 135 are matched with each other. In the first embodiment of the present invention, a second load impedance of the second power amplifier 135 is an equivalent impedance of the impedance adjusting device 134 plus an equivalent impedance of the next stage duplexer 120. At this time, the second output impedance is equal to the conjugate impedance of the second load impedance, so that the energy transferred to the second load impedance by the second power amplifier 135 is the maximum. In addition, in the first embodiment of the present invention, the designer may calculate the impedance value of the impedance adjusting device 134 required for matching the second output impedance in advance according to the smith original image.
Fig. 2A and 2B are block diagrams illustrating a radio frequency transceiver circuit 20 according to a second embodiment of the present invention. In the second embodiment of the present invention, as shown in fig. 2A, the rf transceiver circuit 20 includes a first power amplifier 21 and an impedance adjusting device 22. The first power amplifier 21 has a first output impedance and is electrically connected to the impedance adjusting device 22. The impedance adjusting device 22 is an array of a variable capacitor, an inductor, and at least one switch, and has an adjustable impedance value. In the second embodiment of the present invention, the impedance adjusting device 22 controls at least one switch of the impedance adjusting device 22 to adjust its own impedance value according to a first control signal received from a baseband processor 23, so that a first load impedance of the first power amplifier 21 and the first output impedance are matched with each other. At this time, the first output impedance is equal to the conjugate impedance of the first load impedance, so that the energy transferred to the first load impedance by the first power amplifier 21 is the maximum.
In the second embodiment of the present invention, as shown in fig. 2B, when the first power amplifier 21 in the rf transceiver circuit 20 is replaced with a second power amplifier 24, the impedance adjusting device 22 controls the at least one switch to adjust its own impedance value according to a second control signal received from the baseband processor 23, and a second load impedance of the second power amplifier 24 and a second output impedance of the second power amplifier 24 are matched with each other. At this time, the second output impedance is equal to the conjugate impedance of the second load impedance, so that the energy transferred to the second load impedance by the second power amplifier 24 is the maximum.
Fig. 3A and 3B are block diagrams illustrating an impedance adjusting apparatus 30 according to a third embodiment of the present invention. In the third embodiment of the present invention, as shown in fig. 3A, the impedance adjusting apparatus 30 includes a first switch 301, a second switch 302, a first impedance 303, and a second impedance 304. As shown in fig. 3A, the first switch 301 and the second switch 302 are electrically connected to the first impedance 303 and the second impedance 304, respectively. The impedance adjusting apparatus 30 switches the first switch 301 and the second switch 302 to provide the first impedance 303 or the second impedance 304, and uses the first impedance 303 or the second impedance as a load impedance of the first power amplifier 31. In the third embodiment of the present invention, the impedance adjusting apparatus 30 turns on the first switch 301 and turns off the second switch 302 according to a first control signal received from a baseband processor 32 to provide the first impedance 303, so that the first impedance 303 matches a first output impedance of the first power amplifier 31. In addition, in the third embodiment of the present invention, the designer can calculate the impedance value of the first impedance 303 required for matching with the first output impedance in advance according to the smith original image.
In the third embodiment of the present invention, as shown in fig. 3B, when the impedance adjusting apparatus 30 is used to match a second output impedance of a second power amplifier 33, the impedance adjusting apparatus 30 turns on the second switch 302 and turns off the first switch 301 according to a second control signal received from the baseband processor 32 to provide the second impedance 304, so that the second impedance 304 matches a second output impedance of the second power amplifier 33. In addition, in the third embodiment of the present invention, the designer can calculate the impedance value of the second impedance 304 required for matching with the second output impedance in advance according to the smith original image.
The impedance adjusting apparatus according to the first to third embodiments of the present invention can be applied to a general rf transmitter circuit, and can be used as a load impedance matched with each power amplifier in the rf transmitter circuit. For example, in a typical LTE or CDMA wireless mobile device, a plurality of power amplifiers with different bandwidths are used, and when some of the power amplifiers are to be replaced by a designer, the matching impedance network associated with the power amplifier needs to be replaced accordingly. At this time, if the impedance adjusting apparatus of the present invention is respectively mounted on the load end of each power amplifier, the designer only needs to send a control signal to the impedance adjusting apparatus by the baseband processor to adjust the impedance value thereof, and does not need to replace the matching impedance network collocated with the power amplifier. Therefore, the impedance adjusting device of the invention can ensure that a designer of a radio frequency device does not need to replace the impedance matching network corresponding to the power amplifier together when the designer intends to replace different power amplifiers, thereby effectively saving the development cost. In addition, the impedance adjusting apparatus according to the first to third embodiments of the present invention can design a plurality of different sets of matching impedances according to user requirements, and the number of the matching impedances can be changed according to the requirements of the designer.
The present invention has been disclosed in terms of preferred embodiments, so that those skilled in the art can more clearly understand the contents of the present invention. However, those skilled in the art should appreciate that they can readily use the present invention as a basis for designing or modifying other processes for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Therefore, the scope of the present invention is defined by the appended claims.
Claims (10)
1. A handset device comprising:
a baseband processor;
an antenna for receiving and transmitting radio frequency signals; and
a radio frequency transceiver circuit connected to the baseband processor and the antenna, the radio frequency transceiver circuit comprising:
a power amplifier output configured to be connected to a first power amplifier or a second power amplifier in place of the first power amplifier, the first and second power amplifiers having first and second load impedances, respectively, the first and second load impedances being different from each other; and
an impedance adjustment device electrically connected between the output terminal of the power amplifier and the antenna,
wherein the impedance adjusting means comprises a first switch and a second switch directly connected to the output of the power amplifier,
wherein the baseband processor is connected to the impedance adjustment apparatus and configured to adjust an impedance value of the impedance adjustment apparatus by: controlling states of the first switch and the second switch to selectively couple the power amplifier output to one of: (i) a first impedance having a first impedance value when the first power amplifier is present such that the first load impedance of the first power amplifier matches an output impedance associated with the radio-frequency transceiver circuitry, and (ii) a second impedance having a second impedance value when the second power amplifier is present such that the second load impedance of the second power amplifier matches the output impedance associated with the radio-frequency transceiver circuitry.
2. The handset device of claim 1, wherein the baseband processor is configured to control the state of the first switch and the second switch via a mobile industry processor interface.
3. The handset device of claim 1, wherein the first impedance and the second impedance each have a predetermined impedance value that is based on the first load impedance of the first power amplifier and the second load impedance of the second power amplifier, respectively.
4. The handset device of claim 1, further comprising:
a duplexer coupled between the antenna and the impedance adjusting device.
5. The handset device of claim 4 wherein the output impedance associated with the radio-frequency transceiver circuitry comprises an impedance of the duplexer.
6. An impedance adjusting apparatus configured to impedance-match a first power amplifier having a first load impedance or a second power amplifier having a second load impedance to an output impedance, the first load impedance and the second load impedance being different from each other, the impedance adjusting apparatus comprising:
a first switch directly connected to the output of the power amplifier; and
a second switch directly connected to the power amplifier output,
wherein the power amplifier output is connected to the first power amplifier or the second power amplifier replacing the first power amplifier, and
wherein the first switch and the second switch are configured to transform an impedance value of the impedance adjustment device according to a control signal received from a baseband processor by selectively coupling the power amplifier output to one of: (i) a first impedance having a first impedance value when the first power amplifier is present such that the first load impedance matches the output impedance, and (ii) a second impedance having a second impedance value when the second power amplifier is present such that the second load impedance matches the output impedance.
7. The impedance adjustment apparatus of claim 6, wherein the control signal received from the baseband processor is in accordance with a mobile industry baseband processor interface.
8. The impedance adjusting apparatus according to claim 6, wherein the first impedance and the second impedance each have a predetermined impedance value that is based on the first load impedance of the first power amplifier and the second load impedance of the second power amplifier, respectively.
9. The impedance adjusting apparatus according to claim 6,
wherein the impedance adjustment device is connected to an antenna via a duplexer, the duplexer being coupled between the antenna and the impedance adjustment device.
10. The impedance adjustment apparatus of claim 9, wherein the output impedance comprises an impedance of the duplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910963668.9A CN110661543B (en) | 2015-07-17 | 2015-07-17 | Mobile phone device, radio frequency transceiver circuit and impedance adjusting device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510424768.6A CN104967460A (en) | 2015-07-17 | 2015-07-17 | Cell phone device, radio frequency transceiver circuit and impedance adjustment device |
| CN201910963668.9A CN110661543B (en) | 2015-07-17 | 2015-07-17 | Mobile phone device, radio frequency transceiver circuit and impedance adjusting device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510424768.6A Division CN104967460A (en) | 2015-07-17 | 2015-07-17 | Cell phone device, radio frequency transceiver circuit and impedance adjustment device |
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| Publication Number | Publication Date |
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| CN110661543A CN110661543A (en) | 2020-01-07 |
| CN110661543B true CN110661543B (en) | 2021-07-06 |
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| CN201510424768.6A Pending CN104967460A (en) | 2015-07-17 | 2015-07-17 | Cell phone device, radio frequency transceiver circuit and impedance adjustment device |
| CN201910963668.9A Active CN110661543B (en) | 2015-07-17 | 2015-07-17 | Mobile phone device, radio frequency transceiver circuit and impedance adjusting device |
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| CN201510424768.6A Pending CN104967460A (en) | 2015-07-17 | 2015-07-17 | Cell phone device, radio frequency transceiver circuit and impedance adjustment device |
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| CN114826313B (en) * | 2021-01-11 | 2024-01-09 | 炬芯科技股份有限公司 | Radio frequency circuit, touch detection method of radio frequency circuit and wearable device |
| CN113541632A (en) * | 2021-06-29 | 2021-10-22 | 深圳市广和通无线股份有限公司 | Impedance adjustable circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7379714B2 (en) * | 2004-04-02 | 2008-05-27 | Interdigital Technology Corporation | Method and apparatus for dynamically adjusting a transmitter's impedance |
| US20070135062A1 (en) * | 2005-12-14 | 2007-06-14 | Samsung Electronics Co., Ltd. | Apparatus for automatically matching frequency of antenna in wireless terminal and method thereof |
| KR100752280B1 (en) * | 2005-12-14 | 2007-08-28 | 삼성전자주식회사 | Device for matching frequency of antenna automatically in wireless terminal |
| US7420425B2 (en) * | 2006-09-28 | 2008-09-02 | Via Technologies, Inc. | Power amplifier and method thereof |
| CN101478291A (en) * | 2008-10-24 | 2009-07-08 | 锐迪科微电子（上海）有限公司 | Radio frequency power amplifier circuit and radio frequency power amplifying method |
| JP5672098B2 (en) * | 2011-03-18 | 2015-02-18 | 富士通株式会社 | Wireless terminal device |
| US8638156B2 (en) * | 2011-08-05 | 2014-01-28 | Analog Devices, Inc. | Multi-output-resistance switch driver circuits |
| CN102510297A (en) * | 2011-11-04 | 2012-06-20 | 中兴通讯股份有限公司 | Power amplification module, multi-mode radio frequency transceiver, duplexer and multi-mode terminal |
| CN103428829B (en) * | 2012-05-14 | 2017-03-01 | 联想(北京)有限公司 | A kind of method optimizing communication terminal power consumption and a kind of communication terminal |
| CN103312278B (en) * | 2013-05-10 | 2016-04-20 | 华中科技大学 | A kind of power control system for radio-frequency power amplifier |
| CN103546188A (en) * | 2013-10-30 | 2014-01-29 | 西安乾易企业管理咨询有限公司 | Wireless mobile terminal of self-tuning antenna and adjusting method of self-tuning antenna |
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| CN110661543A (en) | 2020-01-07 |
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