CA2435310A1 - High efficiency wideband linear wireless power amplifier - Google Patents
High efficiency wideband linear wireless power amplifier Download PDFInfo
- Publication number
- CA2435310A1 CA2435310A1 CA002435310A CA2435310A CA2435310A1 CA 2435310 A1 CA2435310 A1 CA 2435310A1 CA 002435310 A CA002435310 A CA 002435310A CA 2435310 A CA2435310 A CA 2435310A CA 2435310 A1 CA2435310 A1 CA 2435310A1
- Authority
- CA
- Canada
- Prior art keywords
- input signal
- supply voltage
- envelope detector
- voltage
- produce
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
-
- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
-
- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0244—Stepped control
-
- 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
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
An apparatus (150), system (100) and method (400-440) are illustrated for power amplification of an input signal to produce a substantially linear amplified output signal, for broadband wireless applications such as 3G
cellular and broadband CDMA systems, without causing significant intermodulation distortion or spectral growth. The preferred system (100) embodiment includes an envelope detector (110) to determine an envelope detector voltage from the input signal; a tracking power supply (120) to determine a supply voltage, preferably as a substantially quantized replica of the envelope detector voltage; an input signal conditioner (150) to determine, in response to the supply voltage, a corresponding phase adjustment and a corresponding gain adjustment, and to modify the input signal using the corresponding phase adjustment and the corresponding gain adjustment to produce a conditioned input signal for power amplification. The preferred system (100) embodiment further includes a power amplifier which operates using the supply voltage, and which amplifies the conditioned input signal to produce the amplified output signal. In the preferred embodiment, the corresponding phase adjustment and a corresponding gain adjustment are separately and independently determined from piecewise linear mappings of a phase response and an amplitude response, respectively, of the power amplifier to a range of variation of the supply voltage.
cellular and broadband CDMA systems, without causing significant intermodulation distortion or spectral growth. The preferred system (100) embodiment includes an envelope detector (110) to determine an envelope detector voltage from the input signal; a tracking power supply (120) to determine a supply voltage, preferably as a substantially quantized replica of the envelope detector voltage; an input signal conditioner (150) to determine, in response to the supply voltage, a corresponding phase adjustment and a corresponding gain adjustment, and to modify the input signal using the corresponding phase adjustment and the corresponding gain adjustment to produce a conditioned input signal for power amplification. The preferred system (100) embodiment further includes a power amplifier which operates using the supply voltage, and which amplifies the conditioned input signal to produce the amplified output signal. In the preferred embodiment, the corresponding phase adjustment and a corresponding gain adjustment are separately and independently determined from piecewise linear mappings of a phase response and an amplitude response, respectively, of the power amplifier to a range of variation of the supply voltage.
Claims (10)
1. A system for power amplification of an input signal to produce an amplified output signal, the system comprising:
an envelope detector, the envelope detector operable to determine an envelope detector voltage from the input signal;
a tracking power supply operably coupled to the envelope detector, the tracking power supply operable to determine a supply voltage from the envelope detector voltage;
an input signal conditioner operably coupled to the tracking power supply, the input signal conditioner operative, in response to the supply voltage, to determine a corresponding phase adjustment and a corresponding gain adjustment, the input signal conditioner further operative to modify the input signal using the corresponding phase adjustment and the corresponding gain adjustment to produce a conditioned input signal; and a power amplifier, the power amplifier operably coupled to the tracking power supply for reception of the supply voltage and operably coupled to the input signal conditioner to amplify the conditioned input signal to produce the amplified output signal.
an envelope detector, the envelope detector operable to determine an envelope detector voltage from the input signal;
a tracking power supply operably coupled to the envelope detector, the tracking power supply operable to determine a supply voltage from the envelope detector voltage;
an input signal conditioner operably coupled to the tracking power supply, the input signal conditioner operative, in response to the supply voltage, to determine a corresponding phase adjustment and a corresponding gain adjustment, the input signal conditioner further operative to modify the input signal using the corresponding phase adjustment and the corresponding gain adjustment to produce a conditioned input signal; and a power amplifier, the power amplifier operably coupled to the tracking power supply for reception of the supply voltage and operably coupled to the input signal conditioner to amplify the conditioned input signal to produce the amplified output signal.
2. The system of claim 1, further comprising:
a first delay circuit operably coupled to the input signal conditioner to synchronize the input signal to the supply voltage from the tracking power supply.
a first delay circuit operably coupled to the input signal conditioner to synchronize the input signal to the supply voltage from the tracking power supply.
3. The system of claim 1, further comprising:
a second delay circuit operably coupled to the tracking power supply to synchronize the supply voltage to the conditioned input signal from the input signal conditioner.
a second delay circuit operably coupled to the tracking power supply to synchronize the supply voltage to the conditioned input signal from the input signal conditioner.
4. The system of claim 1, wherein the tracking power supply is further operative to determine the supply voltage as a substantially quantized version of the envelope detector voltage.
5. The system of claim 1, wherein the amplified output signal is a substantially linear replica of the input signal.
6. A method for power amplification of an input signal to produce an amplified output signal, the method comprising:
(a) envelope detecting the input signal to determine an envelope detector voltage;
(b) determining a supply voltage from the envelope detector voltage;
(c) in response to the supply voltage, determining a corresponding phase adjustment and a corresponding gain adjustment;
(d) modifying the input signal using the corresponding phase adjustment and the corresponding gain adjustment to produce a conditioned input signal; and (e) using the supply voltage, amplifying the conditioned input signal to produce the amplified output signal.
(a) envelope detecting the input signal to determine an envelope detector voltage;
(b) determining a supply voltage from the envelope detector voltage;
(c) in response to the supply voltage, determining a corresponding phase adjustment and a corresponding gain adjustment;
(d) modifying the input signal using the corresponding phase adjustment and the corresponding gain adjustment to produce a conditioned input signal; and (e) using the supply voltage, amplifying the conditioned input signal to produce the amplified output signal.
7. The method of claim 6, wherein step (d) further comprises:
synchronizing the input signal to the supply voltage.
synchronizing the input signal to the supply voltage.
8. The method of claim 6, wherein step (e) further comprises:
synchronizing the supply voltage to the conditioned input signal.
synchronizing the supply voltage to the conditioned input signal.
9. The method of claim 6, wherein the supply voltage is determined as a substantially quantized version of the envelope detector voltage.
10. The method of claim 6, wherein the amplified output signal is a substantially linear replica of the input signal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/765,747 US6735419B2 (en) | 2001-01-18 | 2001-01-18 | High efficiency wideband linear wireless power amplifier |
| US09/765,747 | 2001-01-18 | ||
| PCT/US2001/049343 WO2002058249A2 (en) | 2001-01-18 | 2001-12-18 | High efficiency wideband linear wireless power amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2435310A1 true CA2435310A1 (en) | 2002-07-25 |
| CA2435310C CA2435310C (en) | 2010-03-23 |
Family
ID=25074373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2435310A Expired - Fee Related CA2435310C (en) | 2001-01-18 | 2001-12-18 | High efficiency wideband linear wireless power amplifier |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6735419B2 (en) |
| EP (1) | EP1417770A2 (en) |
| KR (1) | KR20030076618A (en) |
| AU (1) | AU2002243348A1 (en) |
| CA (1) | CA2435310C (en) |
| IL (2) | IL157023A0 (en) |
| WO (1) | WO2002058249A2 (en) |
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| US7801244B2 (en) * | 2002-05-16 | 2010-09-21 | Rf Micro Devices, Inc. | Am to AM correction system for polar modulator |
| JP4230238B2 (en) * | 2003-02-06 | 2009-02-25 | パナソニック株式会社 | Transmitting apparatus and adjustment method thereof |
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| US7353169B1 (en) * | 2003-06-24 | 2008-04-01 | Creative Technology Ltd. | Transient detection and modification in audio signals |
| EP1650864A4 (en) * | 2003-07-25 | 2006-06-28 | Matsushita Electric Ind Co Ltd | Amplification apparatus |
| US7126999B2 (en) * | 2003-08-11 | 2006-10-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Pseudo-polar modulation for radio transmitters |
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-
2001
- 2001-01-18 US US09/765,747 patent/US6735419B2/en not_active Expired - Fee Related
- 2001-12-18 CA CA2435310A patent/CA2435310C/en not_active Expired - Fee Related
- 2001-12-18 WO PCT/US2001/049343 patent/WO2002058249A2/en not_active Application Discontinuation
- 2001-12-18 EP EP01989238A patent/EP1417770A2/en not_active Withdrawn
- 2001-12-18 AU AU2002243348A patent/AU2002243348A1/en not_active Abandoned
- 2001-12-18 KR KR10-2003-7009594A patent/KR20030076618A/en not_active Application Discontinuation
- 2001-12-18 IL IL15702301A patent/IL157023A0/en unknown
-
2003
- 2003-07-20 IL IL157023A patent/IL157023A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002058249A2 (en) | 2002-07-25 |
| CA2435310C (en) | 2010-03-23 |
| US6735419B2 (en) | 2004-05-11 |
| IL157023A0 (en) | 2004-02-08 |
| KR20030076618A (en) | 2003-09-26 |
| AU2002243348A1 (en) | 2002-07-30 |
| US20020094795A1 (en) | 2002-07-18 |
| EP1417770A2 (en) | 2004-05-12 |
| IL157023A (en) | 2013-12-31 |
| WO2002058249A3 (en) | 2004-02-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20161219 |