The disclosure relates to the field of communications, in particularly to a power source and a power source voltage regulating method.
In an electronic device, a power source is required to provide a rapid voltage regulating function in many occasions in order to minimize energy consumption, e.g. a Central Processing Unit (CPU) power supply, a power supply of a radio frequency power amplifier etc., and more typically, a power supply device of the radio frequency power amplifier.
In order to meet increasing demands of users for bandwidths, modulation modes of a communication system are becoming more and more complicated, and a prominent problem is low efficiency of radio frequency power amplifiers, which has become a bottleneck for the improvement of the whole communication system. In order to ensure the linearity of a linear power amplifier, a power supply voltage should be higher than a radio frequency signal peak voltage. Under the conventional direct current power supply mode, a power source output voltage is designed according to the maximum output power of a power amplifier, which results in low efficiency of the power amplifier and serious waste of electric energy when the output power of the power amplifier is relatively low. Therefore, the reduction of power amplifier loss has become the key of energy conservation and emission reduction of the communication system.
In the related arts, in order to improve the efficiency of a power amplifier under different output power, corresponding regulation is generally applied to a power supply voltage, i.e. a relatively high power supply voltage is applied when the output power of the power amplifier is relatively high while a relatively low power supply voltage is applied when the output power of the power amplifier is relatively low. Since voltage regulation of existing power source technologies is relatively slow, the existing power amplifier voltage regulation power supply technology is only applied to changes of output power in a relatively long period of time, e.g. when communication services are busy during daytime, an amplifier is close to its maximal output power and a relatively high voltage is applied for power supply; when there are less services at midnight, the output power of the amplifier is relatively low and a relatively low voltage is applied for power supply. Limited by the voltage regulation speed of the existing power source technologies, efficiency improvement for power amplifiers is limited using the solution above.
To further improve the efficiency of power amplifiers, the voltage regulation speed of power sources needs to be further increased.
Embodiments of the disclosure provide a power source and a power source voltage regulating method to at least solve the problems of slow voltage regulation and low efficiency of a voltage regulating power source in the related art.
According to an aspect of the embodiments of the disclosure, a power source is provided, which includes: a current source device, a voltage source device, and a voltage selection device, wherein
Preferably, the current source device may include: a first input power source, a first switch, a second switch and a first inductor, wherein
Preferably, the current source device may further include an isolating circuit, wherein the isolating circuit may include one of the followings: a forward converter, a flyback converter, a bridge circuit and a push-pull circuit; an isolating device in the isolating circuit may be a transformer.
Preferably, the current source device may further include a third switch, wherein
Preferably, the current source device may include: a second input power source, a second inductor and a fourth switch, wherein
Preferably, the current source device may further include: a third input power source, an insolating circuit and a fifth switch; the isolating circuit may include one of the followings: a forward converter, a flyback converter, a bridge circuit and a push-pull circuit; an isolating device in the isolating circuit may be a transformer.
Preferably, a cathode of the third input power source may be grounded and an anode may be connected to one end of a primary side of the transformer; the other end of the primary side may be connected to one end of the fifth switch; the other end of the fifth switch may be connected to the cathode of the third input power source; one end of a secondary side of the transformer may be an output end of the current source device and the other end may be grounded.
Preferably, the voltage source may include: a sixth switch and a capacitor; one end of the sixth switch may be connected to the current source device, the other end may be an output end of the voltage source device and connected to one end of the capacitor; the other end of the capacitor may be grounded.
Preferably, the voltage selection device may include multiple switches respectively connected to multiple voltage sources in the voltage source device.
Preferably, the switches may include at least one of the followings: triodes, Metal-Oxide-Semiconductor (MOS) tubes, diodes, and Junction Field-Effect Transistors (JFET).
According to another aspect of the embodiments of the disclosure, a power source voltage regulating method is provided, applying any one of the power sources above. The method includes: inputting, by a current source device, a current signal to a voltage source device;
Preferably, the selecting one of the multiple voltage signals as the output voltage signal by the voltage selection device may include:
Preferably, the acquiring different voltage magnitudes through turning on different switches by the voltage selection device may include:
Preferably, the inputting the current signal to the voltage source device by the current source device may include:
Preferably, when the voltage source and a switch in the voltage selection device connected to the voltage source are disconnected, maintaining an output voltage of the voltage source by a capacitor in the voltage source.
Through the embodiments of the disclosure, one current source device is used to supply power to multiple voltage sources in the voltage source device, so as to maintain the output voltages (V1 to VN) of the voltage sources stable; the voltage selection device selects the output of one of the voltage sources as an ultimate output voltage (Vout) according to an actual voltage regulating demand, thereby significantly simplifying the structure of a multi-input power source, hence reducing the volume of the power source, reducing the cost, and improving the efficiency.
It should be noted that the embodiments of the disclosure and the characteristics in embodiments may be combined with each other if there is no conflict. The disclosure will be described in details below with reference to the drawings and in combination with the embodiments.
The embodiments of the disclosure provide a power source.
The current source device 32 is configured to provide a current signal to the voltage source device 34; the voltage source device 34 is connected to the current source device 32, includes multiple voltage sources 342, and is configured to convert the current signal from the current source device 32 into a voltage signal; the voltage selection device 36 is connected to the voltage source device 34, and is configured to select one of voltage signals from multiple voltage sources 342 as an output voltage signal.
In the related art, a voltage regulating power source is slow in voltage regulation and low in efficiency. In the embodiment of the disclosure, one current source device is used to supply power to multiple voltage sources in the voltage source device, so as to maintain the output voltages (V1 to VN) of the voltage sources stable; the voltage selection device selects the output of one of the voltage sources as an ultimate output voltage (Vout) according to an actual voltage regulating demand, thereby significantly simplifying the structure of a multi-input power source, hence reducing the volume of the power source, reducing the cost, and improving the efficiency.
The current source device 32 may be implemented by at least two methods as follows:
(1) the current source device 32 includes: a first input power source, a first switch, a second switch and a first inductor, wherein a cathode of the first input power source is grounded, and an anode is connected to one end of the first switch; the other end of the first switch is connected to the second switch and the first inductor, and the second switch is grounded; the other end of the first inductor is an output end of the current source device 32;
Description is provided below by taking a transformer as an example. To implement the isolating function, the current source device 32 further includes a transformer and a third switch, wherein one end of a primary side of the transformer is connected to the anode of the first input power source, and the other end is connected to one end of the third switch; the other end of the third switch is connected to the cathode of the first input power source; one end of a secondary side of the transformer is connected to the first switch, and the other end is connected to a grounded end of the second switch.
(2) the current source device 32 includes: a second input power source, a second inductor and a fourth switch, wherein a cathode of the second input power source is grounded, and an anode is connected to one end of the second inductor; the other end of the second inductor is an output end of the current source device 32 and connected to one end of the fourth switch, and the other end of the fourth switch is grounded.
In such an implementation method, in order to implement the isolating function, the current source device 32 further includes: a third input power source, an insolating circuit and a fifth switch, wherein the isolating circuit includes, but is not limited to one of the followings: a forward converter, a flyback converter, a bridge circuit and a push-pull circuit; an isolating device in the isolating circuit is a transformer.
To describe by taking a transformer as an example, the connecting relations of all components are as follows: a cathode of the third input power source is grounded, and an anode is connected to one end of a primary side of the transformer; the other end of the primary side is connected to one end of the fifth switch; the other end of the fifth switch is connected to the cathode of the third input power source; one end of a secondary side of the transformer is connected to an output end of the current source device 32 and the other end is grounded.
The voltage source 342 includes: a sixth switch and a capacitor, wherein one end of the sixth switch is connected to the current source device 32, and the other end is an output end of the voltage source and connected to one end of the capacitor; the other end of the capacitor is grounded. The voltage source 342 is simple in structure, thus saving the cost of the power source.
Preferably, the voltage selection device 36 includes multiple switches respectively connected to multiple voltage sources in the voltage source device.
Preferably, the switches include, but are not limited to at least one of the followings: triodes, MOS tubes, diodes, and JFETs. Specifically, the switches may consist of triodes, MOS tubes, diodes, or a combination of the three kinds of devices above. In order to prevent the problem of a short circuit of the voltage source caused by a unidirectional blocking switch device such as a triode and an MOS tube etc., the switches may also consists of switch devices such as JFETs having a bidirectional blocking characteristic. Of course, besides the switches above, switches of other types are also applicable to the disclosure.
The power source has a rapid voltage regulating function and may be applied to a power supply device of a radio frequency amplifier.
To make the technical solutions and implementation methods of the disclosure clearer, several specific implementation methods of the power source will be described in details below in conjunction with preferred embodiments.
A voltage source 404 is a possible implementation mode of the voltage source 342 in the voltage source device 34 in
A voltage selection circuit 406 is a possible implementation circuit of the voltage selection device 36 in
To further facilitate understanding,
The embodiments of the disclosure further provide a power source voltage regulating method. The power source voltage regulating method may be implemented based on any one of the above power sources.
Step 902: a current source device inputs a current signal to a voltage source device;
Step 904: multiple voltage sources in the voltage source device convert the current signal into a voltage signal respectively;
Step 906: a voltage selection device selects one of multiple voltage signals as an output voltage signal;
Step 906 includes: the voltage selection device acquires different voltage magnitudes as output voltage signals through turning on different switches.
Preferably, the acquiring different voltage magnitudes through turning on different switches by the voltage selection device includes: turning on a switch in a voltage source, which is connected to a turned-on switch in the voltage selection device; a capacitor in a voltage source and the current source device form a voltage-stabilizing direct current power source (e.g. a Buck structure direct current power source or other voltage-stabilizing direct current power sources having a complement structure may be formed) to maintain voltage stabilization of the output of the power source under a load.
Preferably, the inputting the current signal to the voltage source device by the current source device includes: controlling an input power source in the current source device to charge an inductor; when a switch in the voltage source is turned on, a current in the inductor charges a capacitor in the voltage source.
Since a branch (including a voltage source and a switch in the voltage selection device connected to the voltage source) which is disconnected currently is not loaded, the output voltage of the voltage source may be maintained by the capacitor in the voltage source.
In the embodiments above, voltage regulation is realized efficiently by means of voltage selection. In addition, an independent input power source is applied to work simultaneously, thus realizing a simple structure, reducing the volume and cost. There are no other power sources working without load, thus realizing higher efficiency and faster voltage regulation response.
To sum up, a power source and a power source voltage regulating method are provided according to the embodiments of the disclosure. By means of the disclosure, one current source device is used to supply power to multiple voltage sources in the voltage source device, so as to maintain the output voltages (V1 to VN) of the voltage sources stable; the voltage selection device selects the output of one of the voltage sources as an ultimate output voltage (Vout) according to an actual voltage regulating demand, thereby significantly simplifying the structure of a multi-input power source, hence reducing the volume of the power source, reducing the cost, and improving the efficiency.
Apparently, those skilled in the art should understand, that each module or each step of the embodiments of the disclosure can be realized with general computing devices; they can be centralized on a single computing device or distributed in a network consisting of multiple computing devices; alternatively, they can be realized through program codes that can be executed by computing devices so that they can be stored in storage devices and executed by computing devices, or they can be manufactured as each integrated circuit module respectively, or several modules or steps of them can be manufactured as a single integrated circuit. In this way, the disclosure is not limited to any specific combination of hardware and software.
The foregoing description is only for preferred embodiments of the disclosure, and shall not limit the disclosure. Those skilled in the art should understand that the disclosure can have various modifications and alternations. Any modifications, equivalent replacements or improvements without departing the spirits and principles of the disclosure shall belong to the protection scope of the disclosure.
Number | Date | Country | Kind |
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201210393107.8 | Oct 2012 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2013/077938 | 6/25/2013 | WO | 00 |