CN101335547A - RF signal double / single conversion implementing and gain adjustable front-located power amplifier integrate circuit - Google Patents
RF signal double / single conversion implementing and gain adjustable front-located power amplifier integrate circuit Download PDFInfo
- Publication number
- CN101335547A CN101335547A CNA2007102008686A CN200710200868A CN101335547A CN 101335547 A CN101335547 A CN 101335547A CN A2007102008686 A CNA2007102008686 A CN A2007102008686A CN 200710200868 A CN200710200868 A CN 200710200868A CN 101335547 A CN101335547 A CN 101335547A
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- Prior art keywords
- signal
- amplifier
- output
- power amplifier
- chip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an integrated circuit (IC) realizing the pre-amplifying of RF (radio-frequency) signals. The circuit firstly amplifies the double-end signal output by a pre-out (a mixer) by an RF variable gain amplifier and then outputs the double-end signal to an amplifier that can transfer double-end input into single-end output, and then the double-end signal is transferred into a single-end signal and output to a power amplifier driven amplifier to be re-amplified, finally the signal is amplified by a certain gain and output to a power amplifying circuit, so as to be transmitted to an antenna and emitted. The circuit of the invention is integrated into to a same chip. The IC of the invention supports various mobile communication protocols, adopts the design of the integrated circuit, and has the advantages of small volume, low power consumption, high linearity and reliability, and good signal transferring, etc. and is suitable for solving the problem of pre-amplifying of multi-mode and wide-band wireless signal in the communication field.
Description
Technical field
The present invention relates to the wireless coverage technology of the communications field, particularly a kind of multi-mode that realizes moves the integrated circuit of the preposition amplification of RF signal.
Background technology
The present mobile communication protocol mode is various, just comprises PHS in second generation mobile communication, and GSM (900MHz, 1800MHz, 1900MHz), and CDMA (IS95), the 3G (Third Generation) Moblie standard comprises CDMA2000, WCDMA, TD-SCDMA again.In the predictable quite a long time, the mobile communication of these mode standards service is all incited somebody to action and is stored in our actual life.And the communication equipment use normally simultaneously anywhere in order to make various modes, allow each user be in various places and can both normally receive movable signal, use corresponding communication business, simple movable signal for each pattern is equipped with a preamplifier had both been wasted fund and Limited resources, also was unpractical in some occasion (as indoor mobile repeater).
In order to solve above realistic problem, the most effective solution just is to use the radio-frequency integrated circuit module of a multi-mode wideband integrated amplifier (Pre-PA).To a certain degree export to power amplifier then from the power amplification of the radiofrequency signal of outputs such as transmitter mixer by this module is transferred to antenna again and launches for user terminal and use.
Summary of the invention
In order to solve the power amplification problem of multi-protocols movable signal, the invention provides a kind of realization radiofrequency signal integrated amplifier integrated circuit, realized that output gain signal is adjustable, signal differential is imported single-ended output, small size, low-power consumption, high linear, the radiofrequency signal enlarging function of high reliability.
In order to realize above-mentioned functions, the technical solution used in the present invention is as follows:
A kind of realization radiofrequency signal preamplifier integrated circuit (IC) chip comprises RF variable gain amplifier (RF-VGA), the single amplifier of two commentaries on classics (Differential to single amplifier), power amplifier driver (PA Driver) three parts.
Above-mentioned RF variable gain amplifier (RF-VGA) comprises two differential amplifier circuits, be used to amplify radiofrequency signal from the output of upper level frequency mixer, control the different voltage gain pattern of entire circuit work simultaneously, to satisfy of the requirement of different mobile communication protocols to signal gain.
The double-end signal that above-mentioned two single amplifiers of commentaries on classics (Differential to single amplifier) are used for coming from frequency mixer converts single-ended signal to offer the power amplifier driving.This circuit realizes that not only function switching signal has certain gain simultaneously.
Above-mentioned power amplifier driver (PA Driver) comprises a linear amplifier, reaches the requirement of each mobile communication protocol after the further amplification of signal that is used for that double rotary single circuit is exported makes signal amplify through three times, improves the requirement of movable signal to the linearity simultaneously
The present invention has following advantage and effect with respect to prior art:
(1). the present invention supports various communications protocols, and as PHS, GSM, CDMA, WCDMA, CDMA2000, TD-SCDMA etc., its RF spectrum coverage reaches 860MHz～2GHz.
(2). the present invention adopts integrated circuit (IC) design, realizes the amplification of RF signal on the basis of chip-scale circuit, and it is little, low in energy consumption to have a volume, and linearity height, double-end signal change single-ended output, reliability advantages of higher.
(3). based on the advantage of above-mentioned multi-protocols and integrated circuit, can be on integrated circuit of the present invention basis, the design correspondent peripheral circuit, connect to form the indoor covering system of wireless signal with other equipment, Kai Fa indoor covering system has simple in structure thus, and applied widely, can support characteristics such as various communications protocols.
Description of drawings
Fig. 1 is a chip design structure principle chart of the present invention;
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment:
As shown be chip structure schematic diagram of the present invention, the emission system operation principle that constitutes of chip is thus: radiofrequency signal outputs to the first order RF variable gain amplifier of chip of the present invention through frequency mixer, and this grade amplifier control entire chip is operated in low gain mode or high gain mode.This moment, output signal still was a differential signal, signal outputs to the second level of the present invention both-end input thus changes single-ended output amplifier, be transformed into single-ended signal and obtain certain gain through second level amplifier signal and export afterbody power amplifier driving amplifier to and carry out power and amplify in advance, outside the output chip, finish emission work then.
Compared with prior art, the present invention has following technical characterictic:
Can preset amplification and realize that chip is fully integrated multiple mobile communication protocol mode signal (PHS, GSM, CDMA);
This product can be realized the adjustable of signal gain;
Chip can realize that the both-end input signal converts single-ended output signal to.
Chip adopts band gap reference (Bandgap) that the chip biasing is provided.
Chip adopts serial communication protocol SPI to realize the inside and outside communication of chip, for chip provides control signal.
As mentioned above, be preferred forms of the present invention.Although described example has been represented and has been described the present invention, but do not represent restriction to the present invention self, those skilled in the art should be understood that, under the prerequisite of the spirit and scope of the present invention that do not break away from the claims definition, can make various variations at it, appending claims has covered all such changes and modifications in the spirit and scope of the invention in form and on the details.
Claims (5)
1. a chip of realizing RF signal power amplifier drive integrated circult is characterized in that, comprising:
RF variable gain amplifier (RF-VGA) is used to receive prime output radiofrequency signal, and radiofrequency signal is amplified back output;
Single-ended output amplifier (Differential to single amplifier) is changeed in the both-end input, converts above-mentioned RF variable gain amplifier output double-end signal to single-ended signal output;
Power amplifier driving amplifier (PA Driver) changes further amplification of single-ended output amplifier output signal with above-mentioned both-end input and exports to power amplifier.
2. right 1 requires the chip of the described a kind of RF of realization signal power amplifier drive integrated circult, it is characterized in that, variable gain amplifier can be realized two kinds of gains adjustable of mobile radio signal, to satisfy the requirement of multiple movable signal agreement.
3. right 1 requires the chip of the described a kind of RF of realization signal power amplifier drive integrated circult, it is characterized in that, single-ended output amplifier is changeed in the both-end input can realize single-ended output with the radiofrequency signal of both-end input, and this function is integrated in the one chip.
4. right 1 requires the chip of the described a kind of RF of realization signal power amplifier drive integrated circult, it is characterized in that, and described RF variable gain amplifier, single-ended output amplifier, the connection of power amplifier driving amplifier are changeed in the both-end input.
5. right 1 requires the chip of the described a kind of RF of realization signal power amplifier drive integrated circult, it is characterized in that, comprises that right 1 requires the built-up circuit of the chip of described RF signal power amplifier drive integrated circult.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102008686A CN101335547A (en) | 2007-06-25 | 2007-06-25 | RF signal double / single conversion implementing and gain adjustable front-located power amplifier integrate circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102008686A CN101335547A (en) | 2007-06-25 | 2007-06-25 | RF signal double / single conversion implementing and gain adjustable front-located power amplifier integrate circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101335547A true CN101335547A (en) | 2008-12-31 |
Family
ID=40197896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007102008686A Pending CN101335547A (en) | 2007-06-25 | 2007-06-25 | RF signal double / single conversion implementing and gain adjustable front-located power amplifier integrate circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101335547A (en) |
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2007
- 2007-06-25 CN CNA2007102008686A patent/CN101335547A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20081231 |