CN102354242A - Power control circuit - Google Patents
Power control circuit Download PDFInfo
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- CN102354242A CN102354242A CN2011102187752A CN201110218775A CN102354242A CN 102354242 A CN102354242 A CN 102354242A CN 2011102187752 A CN2011102187752 A CN 2011102187752A CN 201110218775 A CN201110218775 A CN 201110218775A CN 102354242 A CN102354242 A CN 102354242A
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Abstract
The invention discloses a power control circuit. The invention relates to control on power of a power amplifier and in particular relates to control on current of a power amplifier under different power requirements. The common power control circuits are only regulated by power control signals generated by basebands and can not optimize the current due to different power requirements, therefore the fixed bias circuits designed to meet the high power requirement can lead to unnecessary current consumption under low power requirement. The invention provides a method for dynamically regulating the current according to difference of the output power of the power amplifier. In principle, the method relates to a system which comprises a power supply control circuit and a power amplifier, wherein the power supply control circuit comprises an error amplifier, two voltage stabilizers and a current detection circuit; the detection circuit detects the current flowing through the power amplifier and generates a detection signal; the signal can be a voltage or a current; in one embodiment, the current flowing through the power amplifier can be copied and reduced to a scale; the copied current is further modulated by an input power control signal and is fed back to the error amplifier; and then the error amplifier generates an output voltage to control a base on the power amplifier, thus achieving the aims of dynamically controlling the base voltage and further optimizing the current. The power control circuit is mainly used for controlling the power of the radio frequency power amplifiers.
Description
Technical field:
The present invention relates to output power control, particularly relate to the Current Control of power amplifier under the different capacity requirement power amplifier.
Background technology:
The height of power consumption becomes more and more important to mobile phone in the radio communication in modern times.And when transmitting, the consuming greatly of mobile telephone power consumption at power amplifier through antenna.So the power consumption of control power amplifiers is a very important index.
The power consumption control of power amplifier can realize through the Control of Voltage to its base stage or collector.Common way is a fixed base pole tension and change collector voltage and realize.In order to satisfy the needs of the saturated output of high power, it is higher that base voltage is provided with usually.When requiring low-power output, higher base voltage can cause excessive electric current consume, thereby the serviceable life of having reduced battery.On the other hand, lower base voltage then possibly make power amplifier not reach the requirement of saturation power output.Therefore need a kind of method to come dynamically adjustment base voltage, make and satisfying under the demanded power output that the consume of the electric current of power amplifier reaches minimum.
Summary of the invention:
The invention provides a kind of regulatory work rate amplifier method of current, the base voltage of adjustment power amplifier reaches the purpose of optimizing electric current thereby can come dynamically according to the requirement of different output power.On the principle, this method relates to a system, comprises power control circuit and power amplifier.Power control circuit comprises an error amplifier, voltage stabilizer and a current detection circuit.This testing circuit detects and flows through the electric current of power amplifier, and produces a detection signal.Sort signal can be voltage or electric current.In concrete a realization, the electric current that flows through power amplifier can be replicated and dwindle by a certain percentage.Electric current after duplicating is through the further modulation of power input control signal and feed back on the error amplifier.Error amplifier produces the base stage that output voltage is controlled at power amplifier thus, thereby reaches the purpose of dynamic control base voltage and then optimization electric current.
Description of drawings:
Fig. 1 is power control and power amplifier system schematic diagram
Fig. 2 is the concrete realization of a power control circuit
Fig. 3 describes a mu balanced circuit that is used to produce power amplifier base voltage Vapc
Fig. 4 describes VRAMP and Vapc and time dynamic relation
Embodiment:
What in Fig. 1, describe is a general power amplifier that has power control circuit.A power control signal (VRAMP) is generated by base band, for power amplifier (20) provides supply voltage.Enable signal TX_EN provides On/Off power control circuit (10).Power amplifier (30) amplifies radio signal and is launched by antenna.
Power control circuit in Fig. 2 (10) comprises an error amplifier (21), and feedback network (16) is crossed logical element (19) and current detection circuit (20).A node of feedback network is connected to a fixing voltage.This can be ground connection (zero) or nonzero value.Another node (17) was connected to the drain terminal (a PMOS transistor) of logical element.Node (17) is the output of energy supply control module simultaneously.It is typically connected to the collector of power amplifiers at different levels in power amplifier (30) module.Current detection circuit (20) monitor flows the electric current of logical element, thereby also monitor the electric current of power amplifier, and pass to feedback network (16) to this current information.These information can realize with the side circuit of electric current or voltage characteristic.
The 3rd node (22) of feedback circuit feeds back to the current information at the information of voltage of node (17) and node (18) the positive pole input of error amplifier (21).Error amplifier (21) is amplifying at node (11) power control signal with in the difference of the voltage signal of (12), and produces the gate voltage that a voltage was controlled logical element (19) at node (13).
Current detection circuit (20) also is delivered to another voltage stabilizer (23) to the current information that flows through power amplifier through node (25) simultaneously.This voltage stabilizer provides a constant input voltage by reference voltage source, receives the regulation and control of power control signal VRAMP simultaneously.The voltage that voltage stabilizer produces at output terminal (26) is used to control the base stage of power amplifier (32 and 33).
The structure of voltage stabilizer (23) can be set forth with Fig. 3.It comprises an error amplifier (48), feedback network (46) and excessively logical element (49).Reference voltage is received in the negative pole input (41) of error amplifier (48).Feedback network (46) is then linked in anodal input.A node (45) of this network is connected to a fixing voltage.This can be ground connection (zero) or nonzero value.Another node (47) was connected to the drain terminal (a PMOS transistor) of logical element.Node (47) is the output of energy supply control module simultaneously.Current monitoring signal from node (25) is further modulated by VRAMP.Modulator (50) can have many implementation methods.With metal-oxide-semiconductor is an example.Benefit of the present invention can be as shown in Figure 4.Fig. 4 has described Vapc and VRAMP and time relation.This Vapc is the base voltage that power control circuit offers power amplifier.In a common design, on behalf of VRAMP, curve C concern over time.Vapc and time relation are to be represented by curve A.Vapc does not change basically in time.Curve B is then represented the present invention.When power amplifier need be exported low-power, the value of Vapc was less relatively and be constant.When power amplifier needed output high-power, particularly when saturation power, the value of Vapc rose with the rising of VRAMP.Its rising flex point D can be controlled by the different modulation voltage of VRAMP with decline flex point E.When requiring output power to reduce, the value of Vapc descends with the decline of VRAMP.Can reach the purpose of saving electric current like this.Because the modulating action of VRAMP, the rise and fall of VRAMP become smoothly, thereby can not impact the switch spectrality.
Claims (6)
1. power control circuit that is used for power amplifier; Comprise: 1) voltage regulator; Provide according to the power input control signal and produce respective output voltages: 2) feedback circuit that comprises current detection circuit, 3) second voltage regulator, be used to control the base voltage of power amplifier.
2. power control circuit according to claim 1; It is characterized in that: 1) Voltagre regulator; An output voltage that receives input signal control is provided: 2) error amplifier; It is configured to receive input control signal at its negative pole end, at the positive terminal receiving feedback signals, and is created on the output voltage on the output node; 3) feedback network can provide the voltage and current information of input voltage voltage stabilizer, 4) output voltage of second voltage regulator receives the modulation of power input control signal, and changes with the electric current of power amplifier.
3. in claim 1, current detection circuit is used for monitoring the current drain of power amplification circuit and is delivered to this information in the feedback circuit.
4. in claim 1, the signal that current detection circuit generates is delivered in the feedback circuit of second Voltagre regulator.
5. in claim 2, the current signal that current detection circuit generates receives modulators modulate.Modulation signal is the power input control signal.
6. in claim 5, modulator can be a NMOS pipe, and its grid voltage is the power input control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102187752A CN102354242A (en) | 2011-08-02 | 2011-08-02 | Power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102187752A CN102354242A (en) | 2011-08-02 | 2011-08-02 | Power control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102354242A true CN102354242A (en) | 2012-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102187752A Pending CN102354242A (en) | 2011-08-02 | 2011-08-02 | Power control circuit |
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| CN (1) | CN102354242A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769433A (en) * | 2012-06-06 | 2012-11-07 | 广州慧智微电子有限公司 | Radio-frequency power amplifier power control circuit utilizing NMOS (N-channel metal oxide semiconductor field-effect transistor) regulating tube |
| CN103826256A (en) * | 2014-02-28 | 2014-05-28 | 广州供电局有限公司 | Method for detecting energy consumption of LTE wireless private network based on C-RAN architecture |
| CN104617885A (en) * | 2014-11-20 | 2015-05-13 | 北京芯麒电子技术有限公司 | Power control method and device for mobile terminal power amplifier |
| CN104617886A (en) * | 2014-11-20 | 2015-05-13 | 北京芯麒电子技术有限公司 | Power control method for improving power amplifier switch spectrum and circuit thereof |
| WO2016078620A1 (en) * | 2014-11-20 | 2016-05-26 | 北京芯麒电子技术有限公司 | Power control method, device and communication terminal for improving power amplifier switch spectrum |
| CN110792433A (en) * | 2018-07-16 | 2020-02-14 | 中国石油化工股份有限公司 | Signal transmitting device for measurement while drilling system and cross-screw data transmission method |
| CN111221400A (en) * | 2019-12-27 | 2020-06-02 | 成都锐成芯微科技股份有限公司 | Power supply management system |
| CN112148052A (en) * | 2020-09-28 | 2020-12-29 | 刘承鑫 | Portable adjustable stable alternating-current high-voltage generation system |
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| US20040075501A1 (en) * | 2002-10-16 | 2004-04-22 | Kyoichi Takahashi | High frequency power amplification electric part and wireless communication system |
| US20060192616A1 (en) * | 2005-02-28 | 2006-08-31 | Kyoichi Takahashi | Electronics parts for high frequency power amplifier |
| CN101499782A (en) * | 2008-01-28 | 2009-08-05 | 民瑞科技股份有限公司 | Output power controlling circuit design method for radio frequency power amplifier |
| CN101604960A (en) * | 2008-06-13 | 2009-12-16 | 三星电机株式会社 | The system and method for switching mode power amplifier control |
| US20100156539A1 (en) * | 2008-12-23 | 2010-06-24 | Samsung Electro-Mechanics Co., Ltd. | Power amplifier system with power control function |
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2011
- 2011-08-02 CN CN2011102187752A patent/CN102354242A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040075501A1 (en) * | 2002-10-16 | 2004-04-22 | Kyoichi Takahashi | High frequency power amplification electric part and wireless communication system |
| US20060192616A1 (en) * | 2005-02-28 | 2006-08-31 | Kyoichi Takahashi | Electronics parts for high frequency power amplifier |
| CN101499782A (en) * | 2008-01-28 | 2009-08-05 | 民瑞科技股份有限公司 | Output power controlling circuit design method for radio frequency power amplifier |
| CN101604960A (en) * | 2008-06-13 | 2009-12-16 | 三星电机株式会社 | The system and method for switching mode power amplifier control |
| US20100156539A1 (en) * | 2008-12-23 | 2010-06-24 | Samsung Electro-Mechanics Co., Ltd. | Power amplifier system with power control function |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769433A (en) * | 2012-06-06 | 2012-11-07 | 广州慧智微电子有限公司 | Radio-frequency power amplifier power control circuit utilizing NMOS (N-channel metal oxide semiconductor field-effect transistor) regulating tube |
| CN102769433B (en) * | 2012-06-06 | 2016-04-27 | 广州慧智微电子有限公司 | Adopt the radio-frequency power amplifier power control circuit of NMOS Correctional tube |
| CN103826256B (en) * | 2014-02-28 | 2016-03-30 | 广州供电局有限公司 | Based on the energy consumption detecting method of the LTE wireless private network of C-RAN framework |
| CN103826256A (en) * | 2014-02-28 | 2014-05-28 | 广州供电局有限公司 | Method for detecting energy consumption of LTE wireless private network based on C-RAN architecture |
| WO2016078620A1 (en) * | 2014-11-20 | 2016-05-26 | 北京芯麒电子技术有限公司 | Power control method, device and communication terminal for improving power amplifier switch spectrum |
| CN104617886A (en) * | 2014-11-20 | 2015-05-13 | 北京芯麒电子技术有限公司 | Power control method for improving power amplifier switch spectrum and circuit thereof |
| CN104617885A (en) * | 2014-11-20 | 2015-05-13 | 北京芯麒电子技术有限公司 | Power control method and device for mobile terminal power amplifier |
| CN104617886B (en) * | 2014-11-20 | 2018-11-27 | 北京唯捷创芯电子技术有限公司 | A kind of Poewr control method and its circuit composed for improving power amplifier switches |
| CN104617885B (en) * | 2014-11-20 | 2018-11-27 | 北京唯捷创芯电子技术有限公司 | A kind of Poewr control method and its device for mobile terminal power amplifier |
| US10305430B2 (en) | 2014-11-20 | 2019-05-28 | Beijing Vanchip Technologies Co., Ltd. | Power control method, device and communication terminal for improving power amplifier switch spectrum |
| CN110792433A (en) * | 2018-07-16 | 2020-02-14 | 中国石油化工股份有限公司 | Signal transmitting device for measurement while drilling system and cross-screw data transmission method |
| CN110792433B (en) * | 2018-07-16 | 2023-03-10 | 中国石油化工股份有限公司 | Signal transmitting device for measurement while drilling system and cross-screw data transmission method |
| CN111221400A (en) * | 2019-12-27 | 2020-06-02 | 成都锐成芯微科技股份有限公司 | Power supply management system |
| CN112148052A (en) * | 2020-09-28 | 2020-12-29 | 刘承鑫 | Portable adjustable stable alternating-current high-voltage generation system |
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Application publication date: 20120215 |
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