CN101494694A - Power supply control method and control device, terminal equipment - Google Patents
Power supply control method and control device, terminal equipment Download PDFInfo
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- CN101494694A CN101494694A CNA2009101185076A CN200910118507A CN101494694A CN 101494694 A CN101494694 A CN 101494694A CN A2009101185076 A CNA2009101185076 A CN A2009101185076A CN 200910118507 A CN200910118507 A CN 200910118507A CN 101494694 A CN101494694 A CN 101494694A
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Abstract
The present invention provides a power supply control method, and its device and terminal equipment. The method includes: determining the current operation mode of the data card; providing corresponding output voltage for the power unit based on the operation mode. The embodiment of the invention can adopt different output voltages according to different operation modes, so that it can avoid overheating of the data card, inefficiency of the power amplifier, large loss and the like problems caused by adopting unified output voltage; and the device and terminal equipment has low cost and simple structure.
Description
Technical Field
The present invention relates to power supply technologies, and in particular, to a power supply control method, a control device thereof, and a terminal device.
Background
With the smaller and smaller volume of the wireless data card, the larger and larger heat productivity and higher requirements on power supply management are achieved. At present, on a wireless data card, the same power supply voltage is adopted in different working modes, and because of the existence of a GSM mode, the output voltage is generally set to be higher, so that in the working state of WCDMA, the higher voltage can cause the efficiency reduction of WCDMA power amplification, the loss increase and the overheating danger.
Fig. 1 is a schematic diagram of a circuit for supplying power to a power amplifier of a data card in the prior art. As shown in FIG. 1, the circuit adopts the same Power supply to simultaneously supply Power to a radio frequency Power amplifier and Power Management (PM) chip.
As shown in fig. 1, the circuit comprises a power chip with input current limit, resistors R1 and R2, and a capacitor C1; wherein, R1 and R2 are used for regulating output voltage, and the FB pin of the power supply chip with input current limit is used as the input point of the internal operational amplifier, namely the input point of the chip with voltage feedback. The capacitor C1 mainly filters the voltage and outputs the voltage after converting the voltage into a dc voltage. The power supply chip can supply power for a GSM radio frequency power amplifier, a WCDMA radio frequency power amplifier or a PM power supply management chip through a circuit formed by resistors R1, R2 and C1.
However, the inventor finds the defects in the prior art in the process of implementing the invention: when the data card has two working modes of time division characteristic and frequency division characteristic and shares one power supply, the power amplifier of the data card can consume larger average current when the data card works in the frequency division mode, the power amplifier can generate serious heating problem, and the temperature of the whole data card can rise.
Disclosure of Invention
The embodiment of the invention aims to provide a power supply control method, a power supply control device and terminal equipment, which can adopt different output voltages aiming at different working modes and can avoid the problems of overheating and large loss of a data card caused by adopting the same output voltage.
In order to achieve the above object, an embodiment of the present invention provides a power supply control method, including: determining the current working mode of the data card; and providing corresponding output voltage for the power receiving unit according to the working mode.
In order to achieve the above object, an embodiment of the present invention further provides a power supply control device, including:
the mode determining unit is used for determining the current working mode of the data card;
and the voltage supply unit is used for supplying corresponding output voltage to the power receiving unit according to the working mode.
To achieve the above object, an embodiment of the present invention further provides a terminal device, where the terminal device includes the apparatus recited in any one of claims 5 to 9.
The embodiment of the invention has the advantages that the output voltage can be adjusted according to different working modes, so that the problems of overheating and large loss of the data card caused by the adoption of the same output voltage can be avoided, and the device and the terminal equipment have low cost and simple structure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a prior art circuit for powering a data card;
FIG. 2 is a schematic view of the configuration of a power supply control device according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of a voltage supply unit according to embodiment 2 of the present invention;
FIG. 4 is a schematic diagram of a power supply control apparatus embodying the present invention;
FIG. 5 is a schematic diagram of a voltage supply unit according to embodiment 3 of the present invention;
fig. 6 is a flowchart of a power supply control method of embodiment 5 of the present invention;
fig. 7 is a flowchart of a power supply control method of embodiment 6 of the present invention;
fig. 8 is a flowchart of a power supply control method according to embodiment 7 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Example 1
The present invention provides a power supply control device, as shown in fig. 2, the device including: a mode determination unit 201 and a voltage supply unit 202; the mode determining unit 201 is configured to determine a current operating mode of the data card; the voltage providing unit 202 is configured to provide a corresponding output voltage for the powered unit according to the operating mode.
In this embodiment, the data card may be a mobile communication terminal chip or the like, or may be an independent terminal device applied to a mobile phone, a desktop computer, or a portable computer.
In this embodiment, for example, the data card is a chip of a 3G mobile phone, and the composition and the implemented functions of the chip are similar to those of the prior art, and are not described herein again. In this case, the operation mode of the data card includes various combinations of the time division characteristic system and the frequency division characteristic system, for example, a multimode combination of a dual mode, a triple mode or more than triple mode; the time division characteristic system comprises but is not limited to the technologies of 3G and the later 3G such as GSM, TD-CDMA, WiMAX or TDD-LTE, etc., and the frequency division characteristic system comprises but is not limited to the technologies of 3G and the later 3G such as WCDMA, CDMA2000 or LTE, etc.; but is not limited thereto and other operation modes are possible for different situations.
As shown in fig. 2, the power supply control apparatus may further include a power receiving unit 203. In this embodiment, the power receiving unit 203 may be a power amplifier unit of a data card. For example, the output voltage Vout may be provided to a data card power amplifier, such as a GSM radio frequency power amplifier and a WCDMA radio frequency power amplifier unit; further, power may also be supplied to a power receiving unit such as a Power Management (PM) chip.
In this embodiment, the mode determining unit 201 may be used alone, or may be used integrally with a baseband BB using the mobile phone chip, and in addition, the baseband BB also performs other functions in the prior art, which is not described herein again.
In this embodiment, the mode determining unit 201 may determine the current operating mode of the data card by searching the operator network, so that the voltage providing unit 202 provides the corresponding output voltage for the powered unit according to the operating mode. If the mode determining unit 201 is implemented by using the baseband BB of the mobile phone chip, the baseband BB may determine the current operating mode of the data card by searching the operator network.
In this embodiment, the voltage providing unit 202 may be a power supply unit, and the power supply unit may be any power supply chip, and provides corresponding voltages according to different operation modes and power receiving units.
The following description will take the operating modes of the mobile phone as GSM operating mode and WCDMA operating mode as examples. In this embodiment, when the mode determining unit 201 determines that the current operating mode of the data card is the GSM operating mode, the power supplying unit may output a corresponding output voltage according to the current operating mode, that is, the output voltage Vout may be a higher voltage corresponding to the GSM radio frequency power amplifier in the GSM operating mode, and generally, the voltage is a voltage of a reference power supplying unit and the GSM radio frequency power amplifier, and may be generally determined to be 4.2V.
When the mode determining unit 201 determines that the current operating mode of the data card is the WCDMA operating mode, the power supply unit may output a corresponding output voltage according to the current operating mode, that is, the output voltage Vout is a lower voltage corresponding to the WCDMA radio frequency power amplifier in the WCDMA operating mode, and generally, the voltage may be determined to be higher than 3V according to the WCDMA radio frequency power amplifier, and may not exceed 3.5V.
The above description only takes the GSM and WCDMA two operation modes as an example to adjust the output voltage, but the two operation modes are not limited to the above, and can be adjusted according to the actual situation. In addition, the specific value of the regulated output voltage can be specifically regulated according to the specific power receiving unit, such as the type of a GSM device power amplifier and a WCDMA radio frequency power amplifier, and is not limited to the value corresponding to the power receiving unit.
According to the embodiment, the corresponding output voltage is output according to different working modes, so that the problems of overheating of a data card, low power amplification efficiency and high loss caused by the adoption of the same output voltage can be solved, and the device is low in cost and simple in structure.
Example 2
The present invention provides a power supply control device, as shown in fig. 2, the device including: the functions of the mode determining unit 201, the voltage providing unit 202, and the power receiving unit 203 are similar to those of embodiment 1, and are not described herein.
In this embodiment, as shown in fig. 3, the voltage providing unit 202 may include: a power supply unit 301, a voltage adjustment unit 302, and a voltage output unit 303; wherein, the power supply unit 301 is used for outputting voltage; the voltage adjusting unit 302 is configured to correspondingly adjust the output voltage of the power supply unit 301 according to the operating mode; the voltage output unit 303 is configured to output the regulated output voltage to the power receiving unit 203.
In this embodiment, when the mode determining unit 201 determines that the current operating mode of the data card is the GSM operating mode, the voltage adjusting unit 302 may adjust the output voltage according to the current operating mode, and adjust the output voltage Vout to a higher voltage corresponding to the GSM radio frequency power amplifier in the GSM operating mode, where the voltage may be a voltage of a reference power supply unit and may be generally determined to be 4.2V according to the GSM radio frequency power amplifier.
When the mode determining unit 201 determines that the current operating mode of the data card is the WCDMA operating mode, the voltage adjusting unit 302 may adjust the output voltage according to the current operating mode, and adjust the output voltage Vout to a lower voltage corresponding to the WCDMA radio frequency power amplifier in the WCDMA operating mode, where the voltage may be determined to be higher than 3V according to the WCDMA radio frequency power amplifier, and may not exceed 3.5V.
The above description only takes the GSM and WCDMA two operation modes as an example to adjust the output voltage, but the two operation modes are not limited to the above, and can be adjusted according to the actual situation. In addition, the specific value of the regulated output voltage can be specifically regulated according to the type of the specific power receiving unit, such as a GSM device power amplifier and a WCDMA radio frequency power amplifier, and is not limited to the value corresponding to the power receiving unit.
As shown in fig. 3, the voltage providing unit 202 may further include a filtering unit 304, where the filtering unit 304 is configured to filter the regulated output voltage to change the output voltage into a dc voltage.
In addition, the apparatus may further include a signal transmitting unit (not shown) for transmitting a signal corresponding to the operation mode to the voltage adjusting unit 302. Thus, after the mode determining unit 201 determines the operating mode of the data card, the signal sending unit may send a corresponding signal according to the determination result, and at this time, the voltage adjusting unit 302 may determine the current operating mode of the data card according to the signal, so as to adjust the output voltage accordingly. For example, when the working mode is determined to be the GSM working mode, a high level signal can be sent out; when the working mode is the WCDMA working mode, the low level signal can be sent out, but the method is not limited to this, and other methods can be adopted. In the following, a high level signal is sent in the GSM operation mode, and a low level signal is sent in the WCDMA operation mode.
In this embodiment, the device can be used alone, or can be integrated with the data card, such as a mobile phone chip, and can be used according to specific situations.
Fig. 4 is a schematic structural diagram of a specific application example, and the device is used in an integrated manner with a data card. Wherein, the mode determining unit 201 and the signal transmitting unit can be realized by a Baseband (BB: Baseband) of the data card, and besides, the Baseband also realizes various existing functions;
for example, the signal transmitting unit may be implemented by using a GPIO port above a baseband. At this time, when the mode determining unit 201 is used integrally with the baseband BB, since the operating mode of the data card is controlled by the baseband BB, after the operating mode of the mobile phone is determined, the GPIO port can have different output levels to the voltage adjusting unit 302 by being preset in different operating modes. This is by way of example only and not by way of limitation.
In addition, in the voltage supply unit 202, the power supply unit 301 may adopt a power chip to be input with a current limit as shown in fig. 1, and a stable voltage may be supplied through the FB terminal of the power chip, but is not limited thereto, and may be implemented by adopting a separate power supply unit. The following description will be given taking a power chip using the data card as an example; the power receiving unit 203 may correspond to a GSM rf power amplifier, a WCDMA rf power amplifier, a PM voltage management chip, etc., respectively.
Thus, when the baseband BB determines that the data card is in the GSM operating mode, the baseband BB may send a high level to the voltage regulating unit 302 through its GPIO port; when the baseband determines that the data card is in the WCDMA mode of operation, the baseband may send a low level signal to the voltage adjustment unit 302 through its GPIO port.
As shown in fig. 4, the voltage regulating unit 302 may include: a first resistor R1, a second resistor R2, a third resistor R3 and a control switch unit Q1; wherein,
the first resistor R1 and the second resistor R2 are connected in series; the second resistor R2 is connected in parallel with a series circuit of the control switch unit Q1 and the third resistor R3, one end of the parallel circuit is grounded, and the other end is connected to the FB terminal of the power chip with input current limit. The midpoint of the series circuit of the first resistor R1 and the second resistor R2 is connected to FB, one end of the first resistor R1 is connected to the ends of the second resistor R2 and FB, and the other end outputs the voltage Vout.
In this embodiment, the control switch unit Q1 of the voltage adjusting unit 302 can receive the signal corresponding to the operation mode transmitted by the GPIO port of BB, and when receiving the low level signal, Q1 is turned off, and the output voltage is lower than that in the GSM operation mode. At this time, the output voltage Vout is (1+ R1/R2) × VFB. When receiving a high signal, Q1 is turned on, and R3 and R2 are connected in parallel, and the voltage of FB is constant, so the voltage of the output voltage Vout rises. At this time, the output voltage Vout is {1+ R1/[ R2 × R3/(R2+ R3)]}×VFB)。
As shown in fig. 4, the filtering unit 304 may be implemented by using a capacitor C1. The capacitor C1 is connected in parallel with a series circuit of R1 and R2.
According to the embodiment, the output voltage Vout is adjusted, so that the input voltage of the WCDMA radio frequency power amplifier is reduced, the power amplifier efficiency is improved, the loss is reduced, and the temperature of the whole system is reduced in a WCDMA working mode. When in the GSM working mode, the output voltage Vout is increased, so that the output capacitor can be reduced to the greatest extent, and the cost is saved.
In addition, because the average current required by the GSM radio frequency power amplifier is small, the heat productivity of the system in the GSM mode is small, and therefore, the temperature is basically not greatly influenced by the voltage increase. On the basis of the prior art, only one control switch tube Q1 and a third resistor R3 are needed to be added, and the cost is low.
However, the circuit configuration of the voltage regulation unit is only a specific embodiment of the present invention, and other circuits may be used to realize the voltage regulation.
As can be seen from the above, different output voltages are used for different operating modes; for example, when in the WCDMA mode, the output voltage is adjusted to a lower voltage, so that the input voltage of the CDMA radio frequency power amplifier is reduced, the power amplifier efficiency is improved, the loss is reduced, and the temperature of the whole system is reduced. When in the GSM working mode, the output voltage is regulated to be higher voltage, so that the output capacitor can be reduced to the greatest extent, and the cost is saved.
Example 3
The present invention provides a power supply control device, as shown in fig. 2, the device including: the functions of the mode determining unit 201, the voltage providing unit 202, and the power receiving unit 203 are similar to those of embodiment 1, and are not described herein.
In addition, as shown in fig. 5, the voltage providing unit 202 may include: a selection unit 501 and at least one power supply unit; the selection unit 501 is configured to select a power supply unit to be used according to the operating mode; at least one power supply unit is used for outputting a corresponding output voltage to the power receiving unit 203 according to the selection result.
Wherein the number of the power supply units corresponds to the operation mode. If the operating mode of the data card is the GSM operating mode and the WCDMA operating mode, the corresponding power supply units may be the first power supply unit 502 and the second power supply unit 503 respectively, and the first power supply unit 502 and the second power supply unit 503 respectively provide the corresponding output voltages Vout for the power receiving units in different operating modes, and the magnitudes of the output voltages Vout in different operating modes are similar to those in embodiments 1 and 2, and are not described herein again.
Therefore, the power supply units with different output voltages are adopted for different working modes, and when the power supply units are in the WCDMA working mode, the output voltage is adjusted to be lower voltage, so that the input voltage of the CDMA radio frequency power amplifier is reduced, the power amplifier efficiency is improved, the loss is reduced, and the temperature of the whole system is reduced. When in the GSM working mode, the output voltage is regulated to be higher voltage, so that the output capacitor can be reduced to the greatest extent, and the cost is saved.
Example 4
An embodiment of the present invention provides a terminal device, where the terminal device includes any one of the apparatuses in embodiments 1 to 3. The terminal device may be a data card, a mobile phone, a PDA, a desktop computer, a portable computer, or the like.
As can be seen from the above, the terminal device can adopt power supply units with different output voltages for different operation modes. For example, when in the WCDMA mode, the output voltage is adjusted to a lower voltage, so that the input voltage of the CDMA radio frequency power amplifier is reduced, the power amplifier efficiency is improved, the loss is reduced, and the temperature of the whole system is reduced. When in the GSM working mode, the output voltage is regulated to be higher voltage, so that the output capacitor can be reduced to the greatest extent, and the cost is saved.
Example 5
An embodiment of the present invention provides a power supply control method, as shown in fig. 6, the method includes: determining the current working mode of the data card (see step 601); the powered unit is provided with a corresponding output voltage according to the operating mode (see step 602).
In this embodiment, if the data card adopts a 3G mobile phone chip, the baseband BB of the mobile phone chip can be used to determine the operating mode of the mobile phone, which may include a GSM operating mode and a WCDMA operating mode. But are not limited to these two ways and may include other ways such that the output voltage may be adjusted according to the particular way.
In this embodiment, when the operating mode is the GSM operating mode, the output voltage can be adjusted to a higher voltage according to the power receiving unit, such as a GSM rf power amplifier. When the working mode is a WCDMA working mode, the output voltage can be adjusted to a lower voltage according to the power receiving unit, such as a WCDMA radio frequency power amplifier.
As can be seen from the above, different output voltages are used for different operating modes; when in WCDMA working mode, the output voltage is regulated to lower voltage, so that the input voltage of CDMA radio frequency power amplifier is reduced, the power amplifier efficiency is improved, the loss is reduced, and the temperature of the whole system is reduced. When in the GSM working mode, the output voltage is regulated to be higher voltage, so that the output capacitor can be reduced to the greatest extent, and the cost is saved.
Example 6
The embodiment of the invention provides a power supply control method, which takes the data card as a mobile phone chip as an example and includes two working modes of GSM and WCDMA as an example for explanation.
As shown in fig. 7, the method includes:
in this embodiment, a high level may be sent when the data card is determined to be in GSM mode of operation; when the data card is in the WCDMA mode of operation, a low signal may be sent. But is not limited to this and vice versa. In this embodiment, when the baseband of the data card is used to implement ten, the GPIO port on the baseband may be used to transmit the level signals corresponding to different operating modes, but is not limited thereto.
Step 703 of adjusting the output voltage Vout according to the received signal;
as shown in fig. 4, the specific adjustment method includes: the control switch Q1 of the voltage adjustment unit 302 can receive the signal corresponding to the operation mode transmitted by BB, and when receiving a low level signal, Q1 is turned off, and the output voltage is lower than that in the GSM operation mode. At this time, the output voltage Vout is (1+ R1/R2) × VFB.
When receiving a high signal, Q1 is turned on, and R3 and R2 are connected in parallel, and the voltage of FB is constant, so the voltage of the output voltage Vout rises. At this time, the output voltage Vout is {1+ R1/[ R2 × R3/(R2+ R3) ] } × VFB).
According to the embodiment, the output voltage can be adjusted according to different working modes, so that the problems of overheating of a data card, low power amplification efficiency and high loss caused by the adoption of the same output voltage can be solved, and the device is low in cost and simple in structure. For example, by adjusting the output voltage Vout, in the WCDMA operating mode, the input voltage of the WCDMA radio frequency power amplifier is reduced, the power amplifier efficiency is improved, the loss is reduced, and the temperature of the whole system is reduced. When in the GSM working mode, the output voltage Vout is increased, so that the output capacitor can be reduced to the greatest extent, and the cost is saved. Because the average current required by the GSM radio frequency power amplifier is very small, the heat productivity of the system in the GSM mode is very small, and therefore, the temperature is basically not greatly influenced by the voltage increase. On the basis of the prior art, only one control switch tube Q1 and a third resistor R3 are needed to be added, and the cost is low.
Example 7
The embodiment of the invention provides a power supply control method, which takes the data card as a mobile phone chip as an example and includes two working modes of GSM and WCDMA as an example for explanation.
As shown in fig. 8, the method includes:
According to the embodiment, the power supply units outputting different output voltages can be selected according to different working modes, so that the problems of data card overheating, low power amplifier efficiency and high loss caused by the adoption of the same output voltage can be solved, and the device is low in cost and simple in structure.
For example, by adjusting the output voltage Vout, in the WCDMA operating mode, the input voltage of the WCDMA radio frequency power amplifier is reduced, the power amplifier efficiency is improved, the loss is reduced, and the temperature of the whole system is reduced. When in the GSM working mode, the output voltage Vout is increased, so that the output capacitor can be reduced to the greatest extent, and the cost is saved. Because the average current required by the GSM radio frequency power amplifier is very small, the heat productivity of the system in the GSM mode is very small, and therefore, the temperature is basically not greatly influenced by the voltage increase.
From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by hardware, or by software plus a necessary general hardware platform, and based on such understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the method described in the embodiments of the present invention.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A power supply control method, characterized in that the method comprises:
determining the current working mode of the data card;
and providing corresponding output voltage for the power receiving unit according to the working mode.
2. The method of claim 1, wherein providing the respective output voltages to the powered unit according to the operating mode comprises:
correspondingly adjusting the output voltage of the power supply unit according to the working mode;
outputting the regulated output voltage to the power receiving unit.
3. The method of claim 2, wherein prior to outputting the regulated output voltage, the method further comprises: filtering the regulated output voltage.
4. The method of claim 1, wherein providing the respective output voltages to the powered unit according to the operating mode comprises:
selecting a power supply unit to be used according to the working mode;
outputting the output voltage to the power receiving unit using the selected power supply unit.
5. A power supply control apparatus, characterized in that the apparatus comprises:
the mode determining unit is used for determining the current working mode of the data card;
and the voltage providing unit is used for providing corresponding output voltage for the power receiving unit according to the working mode.
6. The apparatus of claim 5, wherein the voltage providing unit comprises:
a power supply unit for outputting a voltage;
the voltage adjusting unit is used for correspondingly adjusting the output voltage of the power supply unit according to the working mode;
a voltage output unit for outputting the regulated output voltage to the power receiving unit.
7. The apparatus of claim 6, further comprising:
the filtering unit is used for filtering the regulated output voltage;
and the signal sending unit is used for sending the signal corresponding to the working mode to the voltage regulating unit.
8. The apparatus of claim 5, wherein the voltage providing unit comprises:
the selection unit is used for selecting the used power supply unit according to the working mode;
and the power supply unit is used for outputting the corresponding output voltage according to the selection result of the selection unit.
9. The apparatus of claim 5, further comprising:
a powered unit to receive the output voltage.
10. A terminal device, characterized in that it comprises the apparatus of any of claims 5 to 9.
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| CNA2009101185076A CN101494694A (en) | 2009-02-26 | 2009-02-26 | Power supply control method and control device, terminal equipment |
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| CNA2009101185076A CN101494694A (en) | 2009-02-26 | 2009-02-26 | Power supply control method and control device, terminal equipment |
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Cited By (6)
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| WO2012142770A1 (en) * | 2011-04-22 | 2012-10-26 | Nokia Corporation | Providing power to dual radio modems |
| WO2012171258A1 (en) * | 2011-06-15 | 2012-12-20 | 中兴通讯股份有限公司 | Mobile terminal and processing method thereof |
| CN103312350A (en) * | 2012-03-09 | 2013-09-18 | 联想(北京)有限公司 | Power supply management method and communication device |
| CN102136846B (en) * | 2010-01-21 | 2013-11-06 | 天津里外科技有限公司 | Power management device and method |
| CN104180840A (en) * | 2013-05-24 | 2014-12-03 | 德国福维克控股公司 | Electrically operated device, method for calibrating a sensor and computer program product |
| CN108667471A (en) * | 2018-03-19 | 2018-10-16 | 尚睿微电子（上海）有限公司 | A kind of power supply circuit and method |
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- 2009-02-26 CN CNA2009101185076A patent/CN101494694A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102136846B (en) * | 2010-01-21 | 2013-11-06 | 天津里外科技有限公司 | Power management device and method |
| WO2012142770A1 (en) * | 2011-04-22 | 2012-10-26 | Nokia Corporation | Providing power to dual radio modems |
| US9479209B2 (en) | 2011-04-22 | 2016-10-25 | Nokia Technologies Oy | Providing power to dual radio modems |
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Application publication date: 20090729 |