CN104682987A - Radio frequency chip and mobile terminal - Google Patents
Radio frequency chip and mobile terminal Download PDFInfo
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- CN104682987A CN104682987A CN201310618024.9A CN201310618024A CN104682987A CN 104682987 A CN104682987 A CN 104682987A CN 201310618024 A CN201310618024 A CN 201310618024A CN 104682987 A CN104682987 A CN 104682987A
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- clock signal
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- radio frequency
- oscillator
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Abstract
The embodiment of the invention provides a radio frequency chip and a mobile terminal. The radio frequency chip comprises a crystal oscillator, a frequency dividing circuit and a controller, wherein the crystal oscillator is connected with a first crystal, and is suitable for generating a first clock signal; the frequency dividing circuit is connected with the crystal oscillator, and is suitable for converting the first clock signal into a second clock signal through frequency division; and the controller is connected with the crystal oscillator and the frequency dividing circuit respectively, and is suitable for controlling the crystal oscillator and the frequency dividing circuit respectively according to a control signal of a baseband chip, configuring the first clock signal into a main clock signal source of the baseband chip, and configuring the second clock signal into a real-time clock signal source of the baseband chip. The radio frequency chip and the mobile terminal are simple in structures, and are relatively low in cost.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of radio frequency chip and mobile terminal.
Background technology
The clock source of cell phone system is mainly divided into system master clock and real-time clock.In existing cell phone system, general needs obtains system master clock and real-time clock respectively by two crystal.Such as, in current low cost mobile phone implementation, in order to the real-time clock of the master clock and 32K that obtain 26M respectively, on the one hand, need the master clock jointly being produced 26M by the crystal oscillator of radio frequency chip inside and the external crystal of 26M, on the other hand, the external crystal of the crystal oscillator and 32K that recycle described radio frequency chip inside is needed jointly to produce the real-time clock of 32K.But increasingly competitive along with mobile phone market, the further simplification of handset structure and the further reduction of mobile phone cost become in the process of improving product competitiveness problem to be solved.
Therefore, need to provide a kind of new radio frequency chip, to simplify the structure of mobile terminal further and to reduce the cost of mobile terminal.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of new radio frequency chip, to simplify the structure of mobile terminal further and to reduce the cost of mobile terminal.
The embodiment provides a kind of radio frequency chip, described radio frequency chip comprises: crystal oscillator, frequency dividing circuit and controller, wherein: described crystal oscillator is connected with first crystal, is suitable for generation first clock signal; Described frequency dividing circuit is connected with described crystal oscillator, and being suitable for described first clock signal frequency division is second clock signal; Described controller is connected with described crystal oscillator and frequency dividing circuit respectively, be suitable for controlling described crystal oscillator and frequency dividing circuit respectively according to the control signal of baseband chip, and described first clock signal is configured to the master clock signal source of baseband chip, be the real-time clock signal source of described baseband chip by described second clock signal configures.
Alternatively, described radio frequency chip also comprises: RC oscillator, and described RC oscillator is connected with described controller, is suitable for the control signal according to controller, produces the 3rd clock signal.
Alternatively, described controller is under the first preset state, open described frequency dividing circuit and close described RC oscillator, and described first clock signal is configured to the master clock signal source of baseband chip, with the real-time clock signal source by described second clock signal configures being described baseband chip, under the second preset state, open described RC oscillator and close described frequency dividing circuit, and described first clock signal is configured to the master clock signal source of baseband chip, and described 3rd clock signal is configured to the real-time clock signal source of described baseband chip.
Alternatively, described first preset state is that mobile terminal is in normal operating conditions, described second preset state is that described mobile terminal is in initial power-up state, and shutdown starting state, main battery power-down state or abnormal off-mode, wherein said mobile terminal comprises described baseband chip.
Alternatively, described radio frequency chip also comprises RC oscillator calibration device, and described RC oscillator calibration device is connected with described RC oscillator, is suitable for calibrating described RC oscillator.
Alternatively, described crystal oscillator also with the second crystal is connected, and is suitable for generation the 4th clock signal.
Alternatively, described controller is also suitable for the master clock signal source described first clock signal being configured to baseband chip, and described 4th clock signal is configured to the real-time clock signal source of described baseband chip.
Alternatively, described crystal oscillator is lower in working order uses first frequency controling parameters and uses second frequency controling parameters in the dormant state.
Alternatively, described crystal oscillator is digit compensated crystal oscillator.
Alternatively, described controller is connected with described baseband chip by serial bus interface.
Embodiments of the invention additionally provide a kind of mobile terminal, described mobile terminal comprises: radio frequency chip, first crystal and the baseband chip be connected with described radio frequency chip, wherein, described radio frequency chip is suitable for the control signal according to baseband chip, first crystal is utilized to produce the first clock signal, be second clock signal by described first clock signal frequency division, and described first clock signal is configured to the master clock signal source of described baseband chip, be the real-time clock signal source of described baseband chip by described second clock signal configures.
Compared with prior art, in technique scheme, on the one hand, can be connected with first crystal by described crystal oscillator, produce the first clock signal, using the master clock signal source of described first clock signal as baseband chip, on the other hand, can be connected with described crystal oscillator by described frequency dividing circuit, be second clock signal by described first clock signal frequency division, using the real-time clock signal source of described second clock signal as described baseband chip.That is, in technique scheme, only need to utilize a crystal just can produce master clock signal source required for mobile terminal of mobile telephone and real-time clock signal source, this not only simplifies the structure of mobile terminal because saving a crystal, and reduce further the production cost of mobile terminal.
Accompanying drawing explanation
Fig. 1 is the structural representation of radio frequency chip in the embodiment of the present invention;
Fig. 2 is the structural representation of a kind of mobile terminal in the embodiment of the present invention;
Fig. 3 is the structural representation of another kind of mobile terminal in the embodiment of the present invention;
Fig. 4 is the structural representation of another mobile terminal in the embodiment of the present invention.
Embodiment
For making those skilled in the art understand better and realize the present invention, referring to accompanying drawing, be described in detail by specific embodiment.
Fig. 1 is the structural representation of radio frequency chip in the embodiment of the present invention.
Please refer to Fig. 1, described radio frequency chip 200 comprises: crystal oscillator 210, frequency dividing circuit 220 and controller 230.
Please refer to Fig. 2, embodiments of the invention additionally provide a kind of mobile terminal, and described mobile terminal comprises: the baseband chip 400 that radio frequency chip 200, first crystal 100 are connected with described radio frequency chip.
In an embodiment of the present invention, described radio frequency chip 200 is according to the control signal of baseband chip 400, first crystal 100 is utilized to produce the first clock signal, be second clock signal by described first clock signal frequency division, and described first clock signal is configured to the master clock signal source of described baseband chip 400, be the real-time clock signal source of described baseband chip 400 by described second clock signal configures.
In an embodiment of the present invention, described mobile terminal can be mobile phone terminal.
By specifically combining the mobile terminal comprising described radio frequency chip and baseband chip, the internal structure of described radio frequency chip and function are described in detail below.
Please continue to refer to Fig. 2, in an embodiment of the present invention, in described radio frequency chip 200, described crystal oscillator 210 is connected with described controller 230, and described controller 230 controls described crystal oscillator 210 according to the control signal of baseband chip 400.
Such as, after described mobile terminal enters resting state, in order to save electricity, described crystal oscillator can be allowed to enter low-power consumption mode, at this moment described controller can control described crystal oscillator by control signal and switch to resting state from normal operating conditions, wherein, described crystal oscillator uses first frequency controling parameters in normal operation, described crystal oscillator uses second frequency controling parameters in the dormant state, and these two groups of parameters will switch along with mobile terminal and switch between work and resting state.
Because crystal oscillator can cause real-time clock to occur deviation under low-power consumption mode, by carrying out separate configurations to the frequency control parameters of described crystal oscillator under normal operating conditions and resting state, thus realize compensating described real-time clock deviation under mobile terminal sleep state, to improve the performance of system.
Particularly, in an embodiment of the present invention, described controller 230 can be connected with described baseband chip 400 by serial bus interface, receives described control signal from described baseband chip.
Described crystal oscillator 210 is connected with first crystal 100, according to the control signal of described controller 230, produces the first clock signal.
In an embodiment of the present invention, described crystal oscillator 200 can be digit compensated crystal oscillator (DCXO), and described first crystal 100 can be the external crystal of radio frequency chip.
Described first clock signal can be configured to the master clock signal source of described baseband chip 400 by described controller 230.Such as when requiring that the master clock signal source of described baseband chip 400 is 26M, so described first crystal can be 26M crystal, and 26M first clock signal that described crystal oscillator 200 and described 26M crystal produce will be configured to the master clock signal source of described baseband chip 400.
Described radio frequency chip 200 also comprises frequency dividing circuit 220, described frequency dividing circuit 220 is connected with described crystal oscillator 210 with described controller 230 respectively, being suitable for the control signal according to described controller 230, is second clock signal by described first clock signal frequency division.
Described second clock signal configures can be the real-time clock signal source of described baseband chip 400 by described controller 230.Such as, when requiring that the real-time clock signal source of described baseband chip 400 is 32K, so described controller 230 can control described frequency dividing circuit, the the first clock signal frequency division produced by described crystal oscillator 210 is the second clock signal of 32K, and is the real-time clock signal source of described baseband chip 400 by the second clock signal configures of 32K.
It should be noted that, in the above-described embodiments, on the one hand, can be connected with first crystal 100 by described crystal oscillator 210, produce the first clock signal, using the master clock signal source of described first clock signal as baseband chip 400, on the other hand, can be connected with described crystal oscillator 210 by described frequency dividing circuit 220, be second clock signal by described first clock signal frequency division, using the real-time clock signal source of described second clock signal as described baseband chip 400.That is, only need to utilize a crystal just can produce master clock signal source required for described mobile terminal and real-time clock signal source, this not only simplifies the structure of mobile terminal because saving a crystal, and reduce further the production cost of mobile terminal.
Please refer to Fig. 3, in an embodiment of the present invention, described radio frequency chip can also comprise: RC oscillator 240.
Described RC oscillator 240 is connected with described controller 230, is suitable for the control signal according to controller 230, produces the 3rd clock signal.
In an embodiment of the present invention, described controller 230 can under the first preset state, open described frequency dividing circuit 220 and close described RC oscillator 240, described crystal oscillator 210 is made to produce the first clock signal, described first clock signal frequency division is second clock signal by described frequency dividing circuit 220, and described first clock signal is configured to the master clock signal source of baseband chip, and be the real-time clock signal source of described baseband chip by described second clock signal configures.
Particularly, described first preset state can be in normal operating conditions for described mobile terminal.Such as after mobile terminal-opening, close RC oscillator 240, utilize frequency dividing circuit 220 to produce the realtime clock source of mobile terminal.
In an embodiment of the present invention, described controller 230 can under the second preset state, open described RC oscillator 240 and close described frequency dividing circuit 230, described crystal oscillator 210 is made to produce the first clock signal, described RC oscillator 240 produces the 3rd clock signal, and described first clock signal is configured to the master clock signal source of baseband chip, described 3rd clock signal is configured to the real-time clock signal source of described baseband chip.
Particularly, described second preset state is that described mobile terminal is in initial power-up state, shutdown starting state, main battery power-down state or abnormal off-mode.
It should be noted that, in the second preset state, the 3rd clock signal produced by RC oscillator 240 switches to real-time clock signal source, can reduce electric quantity consumption.
In addition, it should be noted that, after described mobile terminal returns to the second preset state from described first preset state, can first calibrate described RC oscillator 240, the 3rd clock signal that just described RC oscillator 240 produces again afterwards switches to real-time clock signal source, and therefore, described radio frequency chip 200 can also comprise RC oscillator calibration device 250, described RC oscillator calibration device 250 is connected with described RC oscillator 240, is suitable for calibrating described RC oscillator 240.
Please refer to Fig. 4, in an embodiment of the present invention, described crystal oscillator 210 is also connected with the second crystal 300, is suitable for generation the 4th clock signal.
Particularly, described controller 230 is also suitable for the master clock signal source described first clock signal being configured to baseband chip 400, and described 4th clock signal is configured to the real-time clock signal source of described baseband chip.
That is, in an embodiment of the present invention, the real-time clock signal source of described baseband chip not only can derive from the second clock signal of described frequency dividing circuit 220 frequency division, also can derive from the 3rd clock signal that described RC oscillator produces, also can derive from the 4th clock signal of described crystal oscillator 210 and described second crystal 300 generation.
Described controller 230 carries out free switching between second, third and the 4th clock signal described in the real-time clock signal source of described baseband chip can being come.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (11)
1. a radio frequency chip, is characterized in that, comprising: crystal oscillator, frequency dividing circuit and controller, wherein:
Described crystal oscillator is connected with first crystal, is suitable for generation first clock signal;
Described frequency dividing circuit is connected with described crystal oscillator, and being suitable for described first clock signal frequency division is second clock signal;
Described controller is connected with described crystal oscillator and frequency dividing circuit respectively, be suitable for controlling described crystal oscillator and frequency dividing circuit respectively according to the control signal of baseband chip, and described first clock signal is configured to the master clock signal source of baseband chip, be the real-time clock signal source of described baseband chip by described second clock signal configures.
2. radio frequency chip as claimed in claim 1, it is characterized in that, also comprise: RC oscillator, described RC oscillator is connected with described controller, is suitable for the control signal according to controller, produces the 3rd clock signal.
3. radio frequency chip as claimed in claim 2, it is characterized in that, described controller is under the first preset state, open described frequency dividing circuit and close described RC oscillator, and described first clock signal is configured to the master clock signal source of baseband chip, with the real-time clock signal source by described second clock signal configures being described baseband chip, under the second preset state, open described RC oscillator and close described frequency dividing circuit, and described first clock signal is configured to the master clock signal source of baseband chip, with the real-time clock signal source described 3rd clock signal being configured to described baseband chip.
4. radio frequency chip as claimed in claim 3, it is characterized in that, described first preset state is that mobile terminal is in normal operating conditions, described second preset state is that described mobile terminal is in initial power-up state, shutdown starting state, main battery power-down state or abnormal off-mode, wherein said mobile terminal comprises described baseband chip.
5. radio frequency chip as claimed in claim 2, it is characterized in that, also comprise RC oscillator calibration device, described RC oscillator calibration device is connected with described RC oscillator, is suitable for calibrating described RC oscillator.
6. radio frequency chip as claimed in claim 1, it is characterized in that, described crystal oscillator also with the second crystal is connected, and is suitable for generation the 4th clock signal.
7. radio frequency chip as claimed in claim 6, it is characterized in that, described controller is also suitable for the master clock signal source described first clock signal being configured to baseband chip, and described 4th clock signal is configured to the real-time clock signal source of described baseband chip.
8. radio frequency chip as claimed in claim 1, is characterized in that, described crystal oscillator is lower in working order to be used first frequency controling parameters and uses second frequency controling parameters in the dormant state.
9. radio frequency chip as claimed in claim 1, it is characterized in that, described crystal oscillator is digit compensated crystal oscillator.
10. radio frequency chip as claimed in claim 1, it is characterized in that, described controller is connected with described baseband chip by serial bus interface.
11. 1 kinds of mobile terminals, it is characterized in that, comprise: the radio frequency chip as described in any one of claim 1 to 10, first crystal and with as described in the baseband chip that is connected of radio frequency chip, wherein, described radio frequency chip is suitable for the control signal according to baseband chip, described first crystal is utilized to produce the first clock signal, be second clock signal by described first clock signal frequency division, and described first clock signal is configured to the master clock signal source of described baseband chip, be the real-time clock signal source of described baseband chip by described second clock signal configures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310618024.9A CN104682987B (en) | 2013-11-27 | 2013-11-27 | Radio frequency chip and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310618024.9A CN104682987B (en) | 2013-11-27 | 2013-11-27 | Radio frequency chip and mobile terminal |
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| Publication Number | Publication Date |
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| CN104682987A true CN104682987A (en) | 2015-06-03 |
| CN104682987B CN104682987B (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310618024.9A Active CN104682987B (en) | 2013-11-27 | 2013-11-27 | Radio frequency chip and mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108121428A (en) * | 2017-12-06 | 2018-06-05 | 北京慧驰科技有限公司 | The internal storage data guard method of MCU and device during a kind of instantaneous power-down |
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| CN1525653A (en) * | 2003-02-27 | 2004-09-01 | 义隆电子股份有限公司 | Single quartz oscillator radio frequency transmitter system |
| CN1854753A (en) * | 2005-04-20 | 2006-11-01 | 精工爱普生株式会社 | Keeping accurate time for a hybrid GPS receiver and mobile phone when powered off |
| CN102868398A (en) * | 2011-07-05 | 2013-01-09 | 联发科技（新加坡）私人有限公司 | Clock signal generating device and method using same |
| CN103199859A (en) * | 2012-01-03 | 2013-07-10 | 联发科技股份有限公司 | Clock generator and mobile device using the same |
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2013
- 2013-11-27 CN CN201310618024.9A patent/CN104682987B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525653A (en) * | 2003-02-27 | 2004-09-01 | 义隆电子股份有限公司 | Single quartz oscillator radio frequency transmitter system |
| CN1854753A (en) * | 2005-04-20 | 2006-11-01 | 精工爱普生株式会社 | Keeping accurate time for a hybrid GPS receiver and mobile phone when powered off |
| CN102868398A (en) * | 2011-07-05 | 2013-01-09 | 联发科技（新加坡）私人有限公司 | Clock signal generating device and method using same |
| CN103199859A (en) * | 2012-01-03 | 2013-07-10 | 联发科技股份有限公司 | Clock generator and mobile device using the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108121428A (en) * | 2017-12-06 | 2018-06-05 | 北京慧驰科技有限公司 | The internal storage data guard method of MCU and device during a kind of instantaneous power-down |
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| Publication number | Publication date |
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| CN104682987B (en) | 2017-03-15 |
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