CN102594288A - Stage matching circuit of radio-frequency power amplifier - Google Patents
Stage matching circuit of radio-frequency power amplifier Download PDFInfo
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- CN102594288A CN102594288A CN2012100414065A CN201210041406A CN102594288A CN 102594288 A CN102594288 A CN 102594288A CN 2012100414065 A CN2012100414065 A CN 2012100414065A CN 201210041406 A CN201210041406 A CN 201210041406A CN 102594288 A CN102594288 A CN 102594288A
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Abstract
The invention discloses a stage matching circuit of a radio-frequency power amplifier. The circuit is used between stages of the radio-frequency power amplifier at least comprising two stages of amplifiers. The circuit at least comprises a first capacitor, a second capacitor and a first inductor, wherein the first and second capacitors are connected between a preceding stage amplifying circuit collector and a posterior stage amplifying circuit base of the radio-frequency power amplifier in series; and one end of the first inductor is connected with an intermediate node of the first and second capacitors and the other end of the first inductor is earthed. The stage matching circuit not only can achieve impedance matching between the preceding stage and posterior stage of the radio-frequency power amplifier, but also can be used for adjusting the gain flatness of the radio-frequency power amplifier and improving the performances of the radio-frequency power amplifier.
Description
Technical field
The present invention relates to a kind of intervalve matching circuit, particularly relate to a kind of intervalve matching circuit of radio-frequency power amplifier.
Background technology
Radio-frequency power amplifier is a circuit module indispensable in the wireless communication system, and the radiofrequency signal after it mainly is responsible for modulating is amplified to the certain power value, launches through antenna again.For the radio-frequency power amplifier that is applied in the portable handheld device transmitter, need it to have small size, high efficiency and low cost, thereby radio-frequency power amplifier should have high as far as possible integrated level.In existing Design of RF Power Amplifier, consider requirement to indexs such as radio frequency power output and power gains, adopt two-stage or casacade multi-amplifier to realize radio-frequency power amplifier usually.Since be two-stage or multi-level RF power amplifier, need intervalve matching circuit, so that the output of the first order (prime) and the input of the second level (back level) are mated.Fig. 1 is the electrical block diagram of a kind of radio-frequency power amplifier in the prior art.As shown in Figure 1; Radio-frequency power amplifier comprises dual-stage amplifier Q1, Q2, input matching circuit, intervalve matching circuit and output matching circuit; Amplifier Q1 and Q2 are used for radiofrequency signal is amplified, and input matching circuit is used to realize importing coupling to reduce the reflection of radiofrequency signal, and output matching circuit is used for converting load resistance to a low-resistance to improve the power output ability; Intervalve matching circuit is used to mate the output impedance of Q1 and the input impedance of Q2; Generally use direct-current coupling or utilize capacitance, yet this intervalve matching circuit is relatively poor to the gain effect of radio-frequency power amplifier at a distance from straight; Can't adjust the gain flatness of amplifying circuit, be unfavorable for the raising of radio-frequency power amplifier performance.
Summary of the invention
For overcoming the problem that above-mentioned prior art exists; Main purpose of the present invention is to provide a kind of intervalve matching circuit of radio-frequency power amplifier; It not only can realize the impedance matching of radio-frequency power amplifier prime and back inter-stage; Can also be used to adjust the gain flatness of radio-frequency power amplifier, improve the performance of radio-frequency power amplifier.
For reaching above-mentioned and other purpose; The present invention provides a kind of intervalve matching circuit of radio-frequency power amplifier; Be applied to comprise at least the inter-stage of the radio-frequency power amplifier of dual-stage amplifier; Wherein, this intervalve matching circuit comprises first electric capacity, second electric capacity and first inductance at least, and this first electric capacity and this second capacitances in series are connected between the back level amplifying circuit base stage of preamplifying circuit collector electrode and this radio-frequency power amplifier of this radio-frequency power amplifier; This first inductance one is terminated at the intermediate node of this first electric capacity and this second electric capacity, other end ground connection.
Further, the collector electrode of this preamplifying circuit is connected to supply voltage through second inductance.
Further, this second inductance is a stray inductance, and it forms through cabling.
Further, the collector electrode of this preamplifying circuit is through the 3rd capacity earth.
Further, this preamplifying circuit and this back level amplifying circuit is the HBT pipe.
Compared with prior art; The intervalve matching circuit that the intervalve matching circuit of a kind of radio-frequency power amplifier of the present invention is formed through second inductance, the 3rd electric capacity, first electric capacity, first inductance and second electric capacity has not only been realized the impedance matching of radio-frequency power amplifier prime with the back inter-stage, but also can be used to adjust the gain flatness of radio-frequency power amplifier; Simultaneously; Form Broadband Matching, radio-frequency power amplifier can be worked in relative broad range, improved the performance of radio-frequency power amplifier.
Description of drawings
Fig. 1 is the electrical block diagram of the radio-frequency power amplifier of prior art;
Fig. 2 by the intervalve matching circuit of a kind of radio-frequency power amplifier of the present invention the circuit diagram of radio-frequency power amplifier of application;
Fig. 3 by the intervalve matching circuit of a kind of radio-frequency power amplifier of the present invention the circuit diagram of radio-frequency power amplifier preferred embodiment of application.
Embodiment
Below through specific instantiation and accompanying drawings execution mode of the present invention, those skilled in the art can understand other advantage of the present invention and effect easily by the content that this specification disclosed.The present invention also can implement or use through other different instantiation, and each item details in this specification also can be based on different viewpoints and application, carries out various modifications and change under the spirit of the present invention not deviating from.
Fig. 2 by the intervalve matching circuit of a kind of radio-frequency power amplifier of the present invention the circuit diagram of radio-frequency power amplifier of application.As shown in Figure 2, the intervalve matching circuit of a kind of radio-frequency power amplifier of the present invention is applied to comprise at least between the two-stage of radio-frequency power amplifier of dual-stage amplifier, comprises at least: first capacitor C 1, second capacitor C 2 and first inductance L 1.
Wherein first capacitor C 1 and second capacitor C 2 are connected in series between the base stage of collector electrode and back level amplifying circuit (transistor Q2) of preamplifying circuit (transistor Q1); First inductance L 1 one is terminated at the intermediate node of first capacitor C 1 and second capacitor C 2, other end ground connection.
Be better realization the present invention, in the present invention's preferred embodiment, the collector electrode of preamplifying circuit (transistor Q1) also is connected to supply voltage VC1 through second inductance L 2, and second inductance L, 2 reality are stray inductance, can form through cabling.
Preferable; The collector electrode of preamplifying circuit (transistor Q1) also can pass through one the 3rd capacitor C, 3 ground connection; At this; The intervalve matching circuit that second inductance L 2, the 3rd capacitor C 3, first capacitor C 1, first inductance L 1 and second capacitor C 2 are formed forms Broadband Matching, and radio-frequency power amplifier can be worked in a relative broad range.
Fig. 3 by the intervalve matching circuit of a kind of radio-frequency power amplifier of the present invention the circuit diagram of radio-frequency power amplifier preferred embodiment of application.Below will cooperate Fig. 3 to further specify the present invention.As shown in Figure 3, radio-frequency input signals RFin links to each other the emitting stage ground connection of Q1 through resistance R 1 with the base stage of transistor Q1 (preamplifying circuit); Collector electrode links to each other with supply voltage VC1 through inductance L 2 (3nH); Simultaneously, its collector electrode also links to each other with capacitor C 1 (6pF) and C3 (0.6pF), and the other end of capacitor C 1 links to each other with capacitor C 2 (6pF) and inductance L 1 (3nH); The other end of capacitor C 2 is connected to the base stage of back level amplifying circuit (transistor Q2) through resistance R 3; The emitter of transistor Q2 is through resistance R 4 ground connection, and collector electrode is connected to supply voltage VC2 through inductance L 3 (3nH), and the radio frequency output signal RFout of output after two-stage is amplified coupling; In preferred embodiment of the present invention, transistor Q1 and Q2 are the HBT pipe.
In sum; The intervalve matching circuit that the intervalve matching circuit of a kind of radio-frequency power amplifier of the present invention is formed through second inductance L 2, the 3rd capacitor C 3, first capacitor C 1, first inductance L 1 and second capacitor C 2; Not only realized of the impedance matching of radio-frequency power amplifier prime with the back inter-stage; But also can be used to adjust the gain flatness of radio-frequency power amplifier, simultaneously, form Broadband Matching; Radio-frequency power amplifier can be worked in relative broad range, improved the performance of radio-frequency power amplifier.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Any those skilled in the art all can be under spirit of the present invention and category, and the foregoing description is modified and changed.Therefore, rights protection scope of the present invention should be listed like claims.
Claims (5)
1. the intervalve matching circuit of a radio-frequency power amplifier; Be applied to comprise at least the inter-stage of the radio-frequency power amplifier of dual-stage amplifier; It is characterized in that: this intervalve matching circuit comprises first electric capacity, second electric capacity and first inductance at least; This first electric capacity and this second capacitances in series are connected between the back level amplifying circuit base stage of preamplifying circuit collector electrode and this radio-frequency power amplifier of this radio-frequency power amplifier; This first inductance one is terminated at the intermediate node of this first electric capacity and this second electric capacity, other end ground connection.
2. the intervalve matching circuit of radio-frequency power amplifier as claimed in claim 1, it is characterized in that: the collector electrode of this preamplifying circuit is connected to supply voltage through second inductance.
3. the intervalve matching circuit of radio-frequency power amplifier as claimed in claim 2, it is characterized in that: this second inductance is a stray inductance, it forms through cabling.
4. like the intervalve matching circuit of claim 1 or 3 described radio-frequency power amplifiers, it is characterized in that: the collector electrode of this preamplifying circuit is through the 3rd capacity earth.
5. the intervalve matching circuit of radio-frequency power amplifier as claimed in claim 4 is characterized in that: this preamplifying circuit and this back level amplifying circuit are the HBT pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100414065A CN102594288A (en) | 2012-02-22 | 2012-02-22 | Stage matching circuit of radio-frequency power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100414065A CN102594288A (en) | 2012-02-22 | 2012-02-22 | Stage matching circuit of radio-frequency power amplifier |
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| CN102594288A true CN102594288A (en) | 2012-07-18 |
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| CN2012100414065A Pending CN102594288A (en) | 2012-02-22 | 2012-02-22 | Stage matching circuit of radio-frequency power amplifier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348420A (en) * | 2013-07-31 | 2015-02-11 | 株式会社村田制作所 | Power amplifier module |
| CN111366204A (en) * | 2020-02-28 | 2020-07-03 | 龙芯中科(金华)技术有限公司 | Flow measurement circuit and method |
| CN112511119A (en) * | 2020-12-01 | 2021-03-16 | 锐石创芯（深圳）科技有限公司 | Interstage matching circuit and push-pull power amplifying circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040207468A1 (en) * | 2002-10-17 | 2004-10-21 | Armin Klomsdorf | Power amplification circuit and method for supplying power at a plurality of desired power output levels |
| CN1723615A (en) * | 2002-12-12 | 2006-01-18 | 皇家飞利浦电子股份有限公司 | Preserving linearity of an isolator-free power amplifier by dynamically adjusting gain and phase |
| CN101478290A (en) * | 2008-11-25 | 2009-07-08 | 锐迪科微电子（上海）有限公司 | Method for improving linearity of multi-stage power amplifier circuit and circuit therefor |
-
2012
- 2012-02-22 CN CN2012100414065A patent/CN102594288A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040207468A1 (en) * | 2002-10-17 | 2004-10-21 | Armin Klomsdorf | Power amplification circuit and method for supplying power at a plurality of desired power output levels |
| CN1723615A (en) * | 2002-12-12 | 2006-01-18 | 皇家飞利浦电子股份有限公司 | Preserving linearity of an isolator-free power amplifier by dynamically adjusting gain and phase |
| CN101478290A (en) * | 2008-11-25 | 2009-07-08 | 锐迪科微电子（上海）有限公司 | Method for improving linearity of multi-stage power amplifier circuit and circuit therefor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348420A (en) * | 2013-07-31 | 2015-02-11 | 株式会社村田制作所 | Power amplifier module |
| CN104348420B (en) * | 2013-07-31 | 2018-04-17 | 株式会社村田制作所 | Power amplifier module |
| CN111366204A (en) * | 2020-02-28 | 2020-07-03 | 龙芯中科(金华)技术有限公司 | Flow measurement circuit and method |
| CN111366204B (en) * | 2020-02-28 | 2022-03-08 | 龙芯中科(金华)技术有限公司 | Flow measurement circuit and method |
| CN112511119A (en) * | 2020-12-01 | 2021-03-16 | 锐石创芯（深圳）科技有限公司 | Interstage matching circuit and push-pull power amplifying circuit |
| WO2022116741A1 (en) * | 2020-12-01 | 2022-06-09 | 锐石创芯(深圳)科技股份有限公司 | Inter-stage matching circuit and push-pull power amplifier circuit |
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Application publication date: 20120718 |