CN1866730A - Linear biasing circuit with adaptability - Google Patents
Linear biasing circuit with adaptability Download PDFInfo
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- CN1866730A CN1866730A CN 200510070804 CN200510070804A CN1866730A CN 1866730 A CN1866730 A CN 1866730A CN 200510070804 CN200510070804 CN 200510070804 CN 200510070804 A CN200510070804 A CN 200510070804A CN 1866730 A CN1866730 A CN 1866730A
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- electrically connected
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- effect transistor
- power amplifier
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Abstract
The invention discloses a linearisation biasing circuit with adaptability, which comprises the following parts: reference voltage source, the first voltage source, the first passive component, the second passive component, the first driving component, the second driving component and the third driving component. The invention has the features of biased current heat balance, gain and phase compensation, whieh reduces the direct current consumed power and the cost.
Description
Technical field
The adaptive linear biasing circuit of a kind of tool refers to a kind of characteristic that bias current temperature-compensating, gain and phase compensation are provided especially, and has the adaptive bias circuit that improves power amplifier linearity (Linearity).
Background technology
In all kinds of different communication systems, no matter be transmitter or receiver, the linearity all is a basic and important specification.For transmitter, power amplifier then is an important and indispensable assembly, and is about communication distance, communication quality and stand-by time or the like, all inseparable with power amplifier.Generally speaking can provide one to be biased into power amplifier usually; but traditional bias circuit is when input power increases; can make the linearity of power amplifier become very poor; and traditional bias circuit makes the direct current of power amplifier and AC characteristic produce the suitable drift even the phenomenon of deterioration easily because of variation of temperature.
Below be the more known linear biasing circuit that is applied to power amplifier, as United States Patent (USP) 6,744, No. 321,6,333,677 etc.
Be with, as from the foregoing, above-mentioned known linear biasing circuit obviously has inconvenience and exists with disappearance, and can wait to be improved.
Summary of the invention
The technical problem to be solved in the present invention provides the adaptive linear biasing circuit of a kind of tool, comprises a reference voltage source, one first voltage source, one first resistance, one second resistance, one first NPN transistor, one second NPN transistor and one the 3rd NPN transistor.First resistance at first, the one end is electrically connected at the reference voltage source anode, and the other end electrically connects the first NPN transistor collector terminal.First NPN transistor, its collector terminal also is electrically connected at the base terminal of second NPN transistor and the 3rd NPN transistor, and its base terminal is electrically connected at the second NPN transistor emitter-base bandgap grading end, and its emitter-base bandgap grading end is electrically connected at an end of second resistance.Second NPN transistor, its collector terminal are electrically connected at the first voltage source anode.The 3rd NPN transistor, its collector terminal also are electrically connected at the first voltage source anode, and its emitter-base bandgap grading end is electrically connected at a power amplifier, and the 3rd NPN transistor provides one first bias current of power amplifier.The other end of second resistance electrically connects a ground connection, and second resistance provides the bias current temperature-compensating of power amplifier.
Temperature compensation characteristic by the adaptive linear biasing circuit of above-mentioned tool, make the direct current and the AC characteristic of power amplifier, do not produce the problem of drift even deterioration along with variations in temperature, and the input power of this power amplifier increases and works in the AB class when amplifying (Class-AB) or category-B and amplifying (Class-B), and the adaptive linear biasing circuit of described tool also can provide the compensation for gain and phase place simultaneously.
Description of drawings
Fig. 1 is the schematic diagram of adaptive linear biasing circuit first embodiment of tool of the present invention.
Fig. 2 is the schematic diagram of adaptive linear biasing circuit second embodiment of tool of the present invention.
Fig. 3 is the functional block diagram of the adaptive linear biasing circuit of tool of the present invention.
Reference voltage source V
30First voltage source V
32
Second voltage source V
34First resistance R
31
Second resistance R
32The first NPN transistor Q
31
The second NPN transistor Q
32The 3rd NPN transistor Q
33
Power amplifier A
31Reference voltage source V
40
First voltage source V
42Second voltage source V
44
First resistance R
41Second resistance R
42
The first metal oxide semiconductcor field effect transistor Q
41
The second metal oxide semiconductcor field effect transistor Q
42
The 3rd metal oxide semiconductcor field effect transistor Q
43
Power amplifier A
41
Second voltage source, 52 first passive components 53
Second passive component, 54 first driving components 55
Embodiment
See also shown in Figure 1ly, it is the schematic diagram of adaptive linear biasing circuit first embodiment of tool.By among the figure as can be known, comprise a reference voltage source V
30, one first voltage source V
32, one first resistance R
31, one second resistance R
32, one first NPN transistor Q
31, one second NPN transistor Q
32And one the 3rd NPN transistor Q
33This first resistance R at first
31, the one end is electrically connected at reference voltage source V
30Anode, the other end electrically connect the first NPN transistor Q
31Collector terminal.The first NPN transistor Q
31, its collector terminal also is electrically connected at the second NPN transistor Q
32And the 3rd NPN transistor Q
33Base terminal, its base terminal is electrically connected at the second NPN transistor Q
32The emitter-base bandgap grading end, its emitter-base bandgap grading end is electrically connected at second resistance R
32An end.The second NPN transistor Q
32, its collector terminal is electrically connected at first voltage source V
32Anode.The 3rd NPN transistor Q
33, its collector terminal also is electrically connected at first voltage source V
32Anode, its emitter-base bandgap grading end is electrically connected at a power amplifier A
31, the 3rd NPN transistor Q
33Power amplifier A is provided
31One first bias current.Second resistance R
32The other end electrically connect a ground connection.
See also shown in Figure 2ly, it is the schematic diagram of adaptive linear biasing circuit second embodiment of tool.By among the figure as can be known, comprise a reference voltage source V
40, one first voltage source V
42, one first resistance R
41, one second resistance R
42, one first metal oxide semiconductcor field effect transistor Q
41, one second metal oxide semiconductcor field effect transistor Q
42And one the 3rd metal oxide semiconductcor field effect transistor Q
43First resistance R at first
41, the one end is electrically connected at reference voltage source V
40Anode, the other end electrically connect the first metal oxide semiconductcor field effect transistor Q
41Drain electrode end.This first metal oxide semiconductcor field effect transistor Q
41, its drain electrode end also is electrically connected at the second metal oxide semiconductcor field effect transistor Q
42And the 3rd metal oxide semiconductcor field effect transistor Q
43Gate terminal, its gate terminal is electrically connected at the second metal oxide semiconductcor field effect transistor Q
42Source terminal, its source terminal is electrically connected at second resistance R
42An end.The second metal oxide semiconductcor field effect transistor Q
42, its drain electrode end is electrically connected at first voltage source V
42Anode.The 3rd metal oxide semiconductcor field effect transistor Q
43, its drain electrode end also is electrically connected at first voltage source V
42Anode, its source terminal are electrically connected at a power amplifier A
41, and the 3rd metal oxide semiconductcor field effect transistor Q
43Power amplifier A is provided
41One first bias current.Second resistance R
42The other end electrically connect a ground connection.
See also shown in Figure 3ly, it is the functional block diagram of the adaptive linear biasing circuit of tool.By among the figure as can be known, comprise one first passive component 53, be to be electrically connected at a reference voltage source 50 anodes; One first driving component 55 is to be electrically connected at this first passive component 53; One second driving component 56 is to be electrically connected at one first voltage source, 51 anodes, this first passive component 53 and this first driving component 55; One the 3rd driving component 57 is to be electrically connected at these first voltage source, 51 anodes, this second driving component 56 and a RF core circuit 500, and one first bias current of this RF core circuit 500 is provided; One second passive component 54 is to be electrically connected at this first driving component 55 and an earth terminal.So that the bias current temperature-compensating of this RF core circuit 500 to be provided, make the direct current and the AC characteristic of this RF core circuit 500 by this second passive component 54, do not produce the problem of drift even deterioration along with variations in temperature.
In sum, the adaptive linear biasing circuit of tool of the present invention has following advantage:
1, the adaptive linear biasing circuit of tool of the present invention is to utilize a bias current to come power amplifier is done temperature-compensating, the interchange of power amplifier and DC characteristic are not varied with temperature and produces drift even deterioration.
2, the adaptive linear biasing circuit of tool of the present invention provides linearization technique, improves the linearity of power amplifier.
3, utilize the adaptive linear biasing circuit of tool of the present invention also can reduce required bias current simultaneously, reduce the consumption of direct current power.
4, the adaptive linear biasing circuit of tool of the present invention can amass bodyization, and has high degree of integration.
5, the adaptive linear biasing circuit framework of tool of the present invention is simple and easy, so the required component number is few, and it is little to reach cloth tool area, reduces cost simultaneously.
All driving components of the present invention are the assembly of bipolarity junction transistor (BJT), heterojunction bipolar transistor (HBT), High Electron Mobility Transistor (HEMT), junction field effect transistor (JFET), metal-semiconductor field effect transistor (MESFET) or metal oxide semiconductcor field effect transistor (MOSFET).All passive components of the present invention are formed by transistor, diode, resistance, inductive impedance assembly or capacitive impedance assembly, and the adaptive linear biasing circuit of tool of the present invention also is used in the close assembly of effect of low noise amplifier or mixer.
Above-mentioned embodiment is used with explanation the present invention, and non-limiting the present invention.
Claims (10)
1, the adaptive linear biasing circuit of a kind of tool is characterized in that, comprising:
One first passive component is electrically connected at a reference voltage source anode;
One first driving component is electrically connected at first passive component;
One second driving component is electrically connected at one first voltage source anode, first passive component and first driving component;
One the 3rd driving component is electrically connected at the first voltage source anode, second driving component and a RF core circuit, and one first bias current of RF core circuit is provided; And
One second passive component is electrically connected at first driving component and an earth terminal;
Wherein, second passive component makes the direct current and the AC characteristic of RF core circuit so that the bias current temperature-compensating of RF core circuit to be provided, and does not produce the problem of drift even deterioration along with variations in temperature.
2, the adaptive linear biasing circuit of tool as claimed in claim 1, it is characterized in that, described first driving component, second driving component and the 3rd driving component are the assembly of bipolarity junction transistor, heterojunction bipolar transistor, High Electron Mobility Transistor, junction field effect transistor, metal-semiconductor field effect transistor or metal oxide semiconductcor field effect transistor.
3, the adaptive linear biasing circuit of tool as claimed in claim 1, it is characterized in that, described first passive component and second passive component are diode, transistor, resistance, inductive impedance or the capacitive impedance that meets size, kind, ratio or form.
4, the adaptive linear biasing circuit of tool as claimed in claim 1 is characterized in that, described RF core circuit is the close assembly of the effect of power amplifier, low noise amplifier and/or mixer.
5, the adaptive linear biasing circuit of a kind of tool is characterized in that, comprising:
One first resistance is electrically connected at a reference voltage source anode;
One the first transistor, its collector terminal is electrically connected at first resistance;
One transistor seconds, its collector terminal are electrically connected at one first voltage source anode, and its base terminal is electrically connected at the collector terminal of the first transistor, and its emitter-base bandgap grading end is electrically connected at the base terminal of the first transistor;
One the 3rd transistor, its collector terminal are electrically connected at the first voltage source anode, and its base terminal is electrically connected at the transistor seconds base terminal, and its emitter-base bandgap grading end is electrically connected at a power amplifier, and the 3rd transistor provides one first bias current of power amplifier; And
One second resistance, one end are electrically connected at the emitter-base bandgap grading end of the first transistor, and the other end then is electrically connected at an earth terminal;
Wherein, second resistance makes the direct current and the AC characteristic of power amplifier so that the bias current temperature-compensating of power amplifier to be provided, and does not produce the problem of drift even deterioration along with variations in temperature.
6, the adaptive linear biasing circuit of tool as claimed in claim 5 is characterized in that, described first, second and third transistor is NPN transistor or PNP transistor.
7, the adaptive linear biasing circuit of tool as claimed in claim 5 is characterized in that, described power amplifier is the close assembly of effect of a low noise amplifier and/or mixer.
8, a kind of tool adaptive linearization bias circuit is characterized in that, comprising:
One first resistance is electrically connected at a reference voltage source anode;
One first field-effect transistor, its drain electrode end is electrically connected at first resistance;
One second field-effect transistor, its drain electrode end are electrically connected at one first voltage source anode, and its gate terminal is electrically connected at the drain electrode end of first field-effect transistor, and its source terminal is electrically connected at the gate terminal of first field-effect transistor;
One the 3rd field-effect transistor, its drain electrode end is electrically connected at the first voltage source anode, its gate terminal is electrically connected at the gate terminal of second field-effect transistor, and its source terminal is electrically connected at a power amplifier, and the 3rd field-effect transistor provides one first bias current of power amplifier; And
One second resistance, the one end is electrically connected at the source terminal of this first field-effect transistor, and the other end then is electrically connected at an earth terminal;
Wherein, second resistance makes the direct current and the AC characteristic of power amplifier so that the bias current temperature-compensating of power amplifier to be provided, and does not produce the problem of drift even deterioration along with variations in temperature.
9, the adaptive linear biasing circuit of tool as claimed in claim 8 is characterized in that, described first, second and third field-effect transistor is junction field effect transistor, metal-semiconductor field effect transistor, metal oxide semiconductcor field effect transistor.
10, the adaptive linear biasing circuit of tool as claimed in claim 8 is characterized in that, described power amplifier is the close assembly of function of a low noise amplifier and/or mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510070804XA CN100563096C (en) | 2005-05-17 | 2005-05-17 | The adaptive linear biasing circuit of a kind of tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510070804XA CN100563096C (en) | 2005-05-17 | 2005-05-17 | The adaptive linear biasing circuit of a kind of tool |
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| Publication Number | Publication Date |
|---|---|
| CN1866730A true CN1866730A (en) | 2006-11-22 |
| CN100563096C CN100563096C (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510070804XA Active CN100563096C (en) | 2005-05-17 | 2005-05-17 | The adaptive linear biasing circuit of a kind of tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997495A (en) * | 2009-08-21 | 2011-03-30 | 立积电子股份有限公司 | Adaptive bias circuit and system thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI684323B (en) | 2018-11-14 | 2020-02-01 | 財團法人工業技術研究院 | Bias circuit |
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2005
- 2005-05-17 CN CNB200510070804XA patent/CN100563096C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997495A (en) * | 2009-08-21 | 2011-03-30 | 立积电子股份有限公司 | Adaptive bias circuit and system thereof |
| CN101997495B (en) * | 2009-08-21 | 2013-11-06 | 立积电子股份有限公司 | Adaptive bias circuit for adaptively biasing communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100563096C (en) | 2009-11-25 |
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