CN1382000A - Power controller - Google Patents
Power controller Download PDFInfo
- Publication number
- CN1382000A CN1382000A CN 01109579 CN01109579A CN1382000A CN 1382000 A CN1382000 A CN 1382000A CN 01109579 CN01109579 CN 01109579 CN 01109579 A CN01109579 A CN 01109579A CN 1382000 A CN1382000 A CN 1382000A
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- power
- aforementioned
- amplifiers
- different levels
- amplifier
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Abstract
A power controller without needing power coupler to detect output power is composed of multiple amplifiers of receiving signal and amplifying its power, multiple matching circuit used between amplifiers, power detector for detecting the power of each amplifier, and bias voltage controller for generating the bias voltage of each amplifier according to the output of power detector to regulate the power of each amplifier.
Description
The present invention relates to a kind of output control device, particularly a kind of power coupling device that need not utilize is detected power output, but utilizes the power detecting device to detect the power output of amplifiers at different levels, with the power of effective control amplifiers at different levels and the power controller of efficient.
Fig. 1 is the calcspar of prior art power control system, wherein numbers 100 and is the calcspar of GSM power amplifier (Power Amplifier).The effect of this power amplifier 100 is the power amplifications with radio-frequency input signals (Radio Frequency Signal), and launches via antenna 190.This power amplifier 100 is applicable to the power control system of mobile phone.As shown in Figure 1, prior art power controller 100 comprises the match circuit 140,141 and 142 of driving stage (Driver Stage) amplifier 110, intergrade (Inter Stage) amplifier 120, power stage (Power Stage) amplifier 130 and amplifiers at different levels.In addition, in order to allow amplifiers at different levels in suitable operational environment action, power controller 100 also comprises Dc bias and analogy power control circuit 150,151.Control circuit 150 receives the first control signal APC1, and is used for controlling and driving level amplifier 110 and intergrade amplifier 120.Control circuit 151 then receives the second control signal APC2, and is used for power controlling level amplifier 130.
As shown in Figure 1, this power control system utilizes antenna 190 that the radio frequency output signal of power controller 100 is launched, and utilizes power coupler (power coupler) 180 and power detecting unit 170 to detect the watt level of radio frequency output signals simultaneously.Power detecting unit 170 produces a control signal APC according to the size of power output.This control signal APC promptly inputs to the APC1 and the APC2 of power controller 100, thus the operating voltages at different levels of power controlling controller 100.
Because the power of the output signal of power controller 100 is quite high, can causes sizable power loss during through power coupler 180 and waste energy.And, the power of afterbody output is near zone of saturation (Saturated Region), therefore be difficult to correctly detect watt level and controlled, and have high power losses (high Power loss) and the do not match problem of (impedancemismatching) of the impedance that produces with power coupler.Simultaneously, the volume of this power coupler 180 can influence the miniaturization of the device that uses this control system.Moreover because this control system only provides the control unit 150,151 of an apc signal to power controller 100, though when high power is exported, amplifier has high efficiency, and when low-power was exported, amplifier then can't produce high efficiency, also wastes energy.
For overcoming the problem that above-mentioned prior art exists, the objective of the invention is to propose a kind of power controller that has the power detecting unit in power controller inside.
Another object of the present invention is to propose a kind of power controller that does not need external power coupler can detect power output.
A further object of the present invention is to propose a kind of power controller that can control the bias voltage of amplifiers at different levels individually, makes it can reach high efficiency when high power, and also can reach high efficiency when low-power.
For reaching above-mentioned purpose, power controller of the present invention comprises to receive and transmits and the plural number level amplifier of power amplification in addition, and in order to mate a plurality of match circuits of aforementioned amplifiers at different levels, is connected between the aforementioned plural number level amplifier; Also comprise: be used for detecting the power of aforementioned amplifiers at different levels and produce the power detecting device of detection signal; One bias control circuit, can receive the aforementioned power detector detection signal, produce the bias voltage of aforementioned amplifiers at different levels and make amplifiers at different levels reach optimum efficiency so as to watt level according to aforementioned amplifiers at different levels.
If only detect the power of afterbody output, because near the zone of saturation, therefore be difficult to correctly detect watt level and controlled, and have high power losses and the unmatched problem of impedance that produces.Therefore, the present invention proposes promptly to detect power from first and second grade output, to reach linear control.
Because the power outputs at different levels that power controller of the present invention can be detected according to the power detecting device of controller itself are adjusted the bias voltage and the operational environment of amplifiers at different levels individually, therefore high efficiency can be when high power, reached, and when low-power, also high efficiency can be reached.Therefore moreover power controller of the present invention has comprised the function of detecting power voluntarily, and can adjust bias voltage voluntarily, uses the power control system of this power controller not need to be provided with in addition a power coupler and detects power output.So system of the present invention can reach miniaturization, and save power loss simultaneously.
Below be accompanying drawing of the present invention:
Fig. 1 is the calcspar of prior art power control system;
Fig. 2 is the calcspar of power control system of the present invention;
Fig. 3 is the circuit diagram of the power controller of Fig. 2.
Component symbol explanation among the figure:
10 power amplifiers, 21,22,23 amplifiers
31,32,33,34 match circuits, 41,42,43 power detecting devices
50 bias control units, 51 bias control circuits
52,53,54 amplifiers, 55 comparators
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 2 is the calcspar of power controller of the present invention.This power controller 10 is identical with the prior art power controller, also comprises driving stage amplifier 21, intergrade amplifier 22, power stage amplifier 23 and match circuit 31,32,33 and 34.These amplifiers 21,22,23 are identical with the prior art power controller with the function and the effect of match circuit 31,32,33,34, no longer repeat specification.
In order to obtain the power output of amplifiers at different levels, power controller 10 of the present invention also comprises a plurality of power detecting devices 41,42,43, and is connected on the match circuit 32,33,34, also can be connected on the amplifiers at different levels certainly.These power detecting devices 41,42,43 are used for detecting the power output of amplifiers at different levels, and produce detection signal DS1, DS2 and DS3.Bias control circuit 51 produces three groups of bias voltage signal VAPC1, VAPC2 and VAPC3 respectively and gives amplifiers at different levels promptly according to detection signal DS1, DS2 and the DS3 of these power detecting devices 41,42,43.Because bias control circuit 51 can be controlled the operational environment of amplifiers at different levels individually, therefore no matter be any power bracket, this power controller 10 all can remain on greater efficiency.Certainly, though present embodiment uses three power detecting devices 41,42,43 simultaneously, also can only use one or two power detecting device according to different designs.For example, only use power detecting device 41 and 43, or only use power detecting device 41 and 42 etc.
Fig. 3 is the example of the partial circuit figure of Fig. 2 power controller.As shown in the drawing, this embodiment be with triode as amplifier, so triode T1, T2, T3 are respectively as the element of amplifiers at different levels.And bias value VAPC1 at different levels, VAPC2 and VAPC3 are connected to the base stage of each triode T1, T2, T3 respectively via R1, R2 and R3, are used for controlling the base voltage of each triode.As shown in the figure, present embodiment be with diode D1, D2 and D3 as the power detecting device, its output signal is respectively detection signal DS1, DS2 and DS3.Certainly, the element of power detecting device is not limited to diode, and other are inductance, resistance and capacitor seriesing circuit or the like for example, all can be used as the power detecting device.Because power detecting device of the present invention is directly connected in match circuit, therefore can detect power simultaneously, not only simplicity of design and can save power loss by the action of coupling.
Shown in Fig. 2 and 3, the bias control unit 50 of power controller 10 of the present invention also comprises a comparator 55.This comparator 55 is at this power controller 10 not during output signal, that is the power output of driving stage amplifier 21 sends a decay enable signal V-E to signal by-pass unit 56 when being lower than a critical value, and the enforcement circuit of this signal by-pass unit 56 as shown in Figure 3.This signal by-pass unit 56 receive the decay enable signal after, promptly by triode T4, T5 with radio-frequency input signals via capacitor C 7 ground connection, make this radio-frequency input signals can not promote driving stage amplifier 21 because of overflow.So, the amplifiers at different levels of this power controller 10 can power output, thereby has saved the energy.
Though more than with embodiment the present invention is described, therefore do not limit scope of the present invention, only otherwise break away from main idea of the present invention, can carry out various forms of changes.
Claims (3)
1. power controller comprises to receive and transmits and the plural number level amplifier of power amplification in addition, and a plurality of match circuit, mates aforementioned amplifier at different levels and is connected between the aforementioned plural number level amplifier; It is characterized in that: further comprising:
Be used for detecting the power of aforementioned amplifiers at different levels and produce the power detecting device of detection signal;
One detection signal that receives the aforementioned power detector, produce the bias voltage of aforementioned amplifiers at different levels and make amplifiers at different levels reach the bias control circuit of optimum efficiency so as to watt level according to aforementioned amplifiers at different levels.
2. power controller as claimed in claim 1 is characterized in that: wherein aforementioned bias control circuit comprises a comparator of exporting a bypass control signal when this power controller is failure to actuate.
3. power controller as claimed in claim 2 is characterized in that: it also comprises one when aforementioned bypass control signal activation, with the aforementioned ground connection that transmits, and the signal by-pass unit that makes this transmit and can not be sent to aforementioned amplifiers at different levels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011095792A CN1159936C (en) | 2001-04-18 | 2001-04-18 | Power controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011095792A CN1159936C (en) | 2001-04-18 | 2001-04-18 | Power controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1382000A true CN1382000A (en) | 2002-11-27 |
| CN1159936C CN1159936C (en) | 2004-07-28 |
Family
ID=4658006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011095792A Expired - Lifetime CN1159936C (en) | 2001-04-18 | 2001-04-18 | Power controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1159936C (en) |
-
2001
- 2001-04-18 CN CNB011095792A patent/CN1159936C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1159936C (en) | 2004-07-28 |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20040728 |