CN1661934A - Match control circuit of power amplifying module - Google Patents

Match control circuit of power amplifying module Download PDF

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Publication number
CN1661934A
CN1661934A CN2004100865421A CN200410086542A CN1661934A CN 1661934 A CN1661934 A CN 1661934A CN 2004100865421 A CN2004100865421 A CN 2004100865421A CN 200410086542 A CN200410086542 A CN 200410086542A CN 1661934 A CN1661934 A CN 1661934A
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CN
China
Prior art keywords
pam
output
matching
amplifying module
power amplifying
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Granted
Application number
CN2004100865421A
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Chinese (zh)
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CN100388637C (en
Inventor
安英植
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Inspur LG Digital Mobile Communications Co Ltd
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LG Electronics China Research and Development Center Co Ltd
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Publication of CN1661934A publication Critical patent/CN1661934A/en
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Publication of CN100388637C publication Critical patent/CN100388637C/en
Expired - Fee Related legal-status Critical Current
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/387—A circuit being added at the output of an amplifier to adapt the output impedance of the amplifier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/045—Circuits with power amplifiers with means for improving efficiency

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)

Abstract

The present invention relates to a kind technology of load match automatic optimization about mobile communication terminal machine when the output level of the power amplifying module changes,specifically speaking,it is a match control circuit of power amplifying module.The invention includes the following parts:PAM output detecting part(1) which is used to detect the output level of PAM and export the signal matched with the PAM.Central processing device(2) which regulates the PAM matching value and export the controlling signal according the output test signal.Matching controlling part(3) which adjusts the matching value of the L/C matching part according to the controlling signal.L/C matching part(4) which setups the matching value corresponding with the current PAM through the control of the matching controlling part(3).The beneficial effect of this invention lies in detecting the output power of the PAM and keeping optimum matching state continuously.

Description

The match control circuit of power amplifying module
Technical field
The present invention relates to mobile communication terminals such as mobile phone when the output rank of power amplifier module changes, a kind of technology that load matched will self-optimization.
Background technology
Generally speaking, power amplifying module (PAM:Power AMP Module) has following effect.That is,, take into account the loss of duplexer (Duplexer), modulation signal is increased to suitable rank with the modulation system (for example, OQPSK:Offset Quadrature Phase ShiftKeying) of regulation.
But, exist tangible deficiency based on the PAM match circuit of conventional art.That is, fixing matching value is used in the influence that not changed by PAM output always on specific power, and output that can't corresponding PAM changes.
(a) of Fig. 1 is to export the optimal matching value of illustration about the 16dBm of PAM output and 28dBm (b).The matching value that is fit to the PAM of output 28dBm, when being applied in the PAM that is output as 16dBm, the efficient of PAM reduces.On the contrary, the matching value that is fit to be output as the PAM of 16dBm uses being output as on the PAM of 28dBm, and the efficient of its PAM reduces too.
In the PAM of conventional art match circuit, irrelevant like this with the output variation of PAM, only on specific power, use fixing matching value, so PAM exports when changing, and can't keep best matching state.
Summary of the invention
So, the objective of the invention is to, according to the power output variation of PAM, adjust the value of the inductance/capacitance device of matching part, make it the coupling that reaches best.
Its structure of a kind of match control circuit of power amplifying module includes: detect the output rank of PAM, the PAM output test section 1 of the output detection signal of output and its coupling; According to the output detection signal of above-mentioned PAM, in order to adjust the PAM matching value, the central processing unit 2 of output control signal; According to above-mentioned control signal, adjust the coupling control part 3 of the inductance/capacitance device value of the L/C matching part of mentioning after a while 4; By the control of above-mentioned coupling control part 3, PAM is set exports corresponding matching value L/C matching part 4.
Above-mentioned L/C matching part 4 is N inductance and the diode (L of input (LOAD) by inserting side by side 1//D 11, L 2//D 12, o, L n//D 1n) be connected on the input of module (PAM) of power expander, above-mentioned input (LOAD) is N capacitor and the diode (C by connecting side by side on the one hand 1//D 21, C 2//D 22, o, C n//D 2n), be connected to that earth terminal constitutes.
Beneficial effect of the present invention is, can detect the power output of PAM, according to the matching value of the variation PAM matching part of its power output be adjusted into just when, continue to keep best matching state.
Description of drawings
Fig. 1 (a) is the optimum matching point chart of the 16dBm output of PAM;
Fig. 1 (b) is the optimum matching point chart of 28dBm output;
Fig. 2 is based on the match control circuit block diagram of power amplifying module of the present invention.
The symbol description * * * of the relevant accompanying drawing major part of * *
1:PAM exports test section 2: central processing unit
3: coupling control part 4:L/C matching part
Embodiment
Below, carry out following detailed description for the present invention in conjunction with the accompanying drawings.
Fig. 2 is according to the concrete block diagram of the match control circuit of power amplifier module of the present invention.As shown in the figure, the output rank of power amplifying module (PAM) is when 16dBM is changed to 28dBM, and matching value is also adjusted thereupon automatically.
At first, PAM output test section 1 detects the output rank of power amplifying module (PAM) (for example: 16dBM), relevant output detection signal (PWR_DET) output is on central processing unit 2.
Therefore, above-mentioned central processing unit 2 is a foundation with above-mentioned output detection signal (PWR_DET), and the output rank of identification power amplifying module (PAM) is 16dBM, for matching value being set, output control signal (CTL).For instance, for all the inductance (L according to L/C matching part 4 are set 1| Ln) and capacitor (C 1| matching value Cn), output control signal (CTL).
According to this, mating control part 3 in order to ensure the inductance (L that is connected to above-mentioned L/C matching value 4 side by side 1| Ln) capacitor (C 1| diode (D Cn) 11| D 1n), (D 21| D 2n) all be closed condition, cut off and open (on) power supply.
Thereupon, because the diode (D of above-mentioned L/C matching part 4 11| D 1n), (D 21| D 2n) all close corresponding all inductance (L 1| Ln) and capacitor (C 1| Cn) the corresponding matching value of other (16dBM) power amplifying module (PAM) of output stage now will be provided with.
After, the output rank of above-mentioned PAM output test section 1 regular detection power extension module (PAM) is consequently judged and is changed to prescribed level (example: 28dBM), corresponding output detection signal (PWR_DET) is exported on central processing unit 2.
Therefore, above-mentioned central processing unit 2 is a foundation with above-mentioned output detection signal (PWR_DET), (PAM) output rank of discerning present power amplifying module is 28dBM, guarantees that it can be provided with corresponding matching value output control signal (CTL) according to output rank (28dBM).For instance, 4 of the L/C matching part all inductance (L 1| Ln) and capacitor (C 1| Cn), except several (for example: L 1| L 3, C 1| C 3) in addition, can be in order to make it according to inductance (L 4| Ln) and capacitor (C 4| Cn) matching value is set, and output control signal (CTL).
In view of the above, above-mentioned coupling control part 3 supply on voltages are guaranteed the inductance (L of above-mentioned L/C matching part 4 1| Ln) and capacitor (C 1| Cn), be connected respectively to inductance (L 1| L 3) and capacitor (C 1| C 3) on diode (D 11| D 13), (D 21| D 23) be the on state, make other be connected respectively to inductance (L 4| Ln) and capacitor (C 4| diode (D Cn) 14| D 1n), (D 24| D 2n) be closed condition, cut off it and open (on) power supply.
Thereupon, above-mentioned inductance (L 1| L 3) and capacitor (C 1| C 3) respectively short circuit of two ends, at all inductance (L 1| Ln) and capacitor (C 1| Cn), because of remaining inductance (L 4| Ln) and capacitor (C 4| Cn) now export rank (28dBM), will (PAM) matching value of power amplifying module be set for correspondence.
As mentioned above, the present invention can detect the power output of PAM, according to the matching value of the variation PAM matching part of its power output be adjusted into just when, irrelevant with the variation of power output, sustainable maintenance best matching state.
Above embodiment only is used to illustrate the present invention, but not is used to limit the present invention.

Claims (3)

1. the match control circuit of power amplifying module is characterized in that including: detect the output rank of PAM, the PAM output test section (1) of the detection signal of output and its coupling; According to the output detection signal of above-mentioned PAM, in order to adjust the PAM matching value, the central processor unit (2) of output control signal; According to above-mentioned control signal, adjust the coupling control part (3) of the inductance/capacitance device value of L/C matching part (4); By the control of above-mentioned coupling control part (3), present PAM is set exports corresponding matching value L/C matching part (4).
2. the match control circuit of power amplifying module according to claim 1 is characterized in that, described coupling control part (3) optionally cuts off the diode starting resistor of L/C matching part (4) according to control signal.
3. the match control circuit of power amplifying module according to claim 1 is characterized in that, L/C matching part (4) are N inductance and the diode (L of input (LOAD) by inserting side by side 1//D 11, L 2//D 12, o, L n//D 1n) be connected on the input of module (PAM) of power expander, above-mentioned input (LOAD) is N capacitor and the diode (C by connecting side by side on the one hand 1//D 21, C 2//D 22, o, C n//D 2n) be connected to earth terminal.
CNB2004100865421A 2004-02-25 2004-10-21 Match control circuit of power amplifying module Expired - Fee Related CN100388637C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040012734 2004-02-25
KR1020040012734A KR100595656B1 (en) 2004-02-25 2004-02-25 Circuit for controlling load matching in power amp module

Publications (2)

Publication Number Publication Date
CN1661934A true CN1661934A (en) 2005-08-31
CN100388637C CN100388637C (en) 2008-05-14

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Application Number Title Priority Date Filing Date
CNB2004100865421A Expired - Fee Related CN100388637C (en) 2004-02-25 2004-10-21 Match control circuit of power amplifying module

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CN (1) CN100388637C (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06310954A (en) * 1993-04-27 1994-11-04 Sony Corp Semiconductor power amplifier integrated circuit
US5973557A (en) * 1996-10-18 1999-10-26 Matsushita Electric Industrial Co., Ltd. High efficiency linear power amplifier of plural frequency bands and high efficiency power amplifier
JP3475037B2 (en) * 1997-03-14 2003-12-08 株式会社東芝 transceiver
KR20020062409A (en) * 2001-01-20 2002-07-26 삼성전자 주식회사 Power rate inhancement circuit for rf power amplifier of dual mode mobile phone
KR100651159B1 (en) * 2002-06-01 2006-11-29 김송강 High power amplifier

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KR100595656B1 (en) 2006-07-03
KR20050087118A (en) 2005-08-31
CN100388637C (en) 2008-05-14

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Owner name: LANGCHAO LEJIN DIGITAL MOBILE COMMUNICATION CO., L

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Address after: 264006 No. 228 Changjiang Road, Yantai Economic Development Zone, Shandong, China

Patentee after: Langchao Lejin Digital Mobile Communication Co., Ltd.

Address before: Two Beijing 100102 Chaoyang District city in Wangjing Lize Park No. 203 Petrova building block B

Patentee before: LG Electronic (China) Research and Development Center Co., Ltd.

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