Patent US6377784B2 successfully refreshed from Google Patents.
US6377784B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-efficiency modulation RF amplifier
Assignee: Intel Corp
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Filing: 1999-02-09
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Granted: 2002-04-23
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Expires: 2019-02-09
Abstract
Abstract The present invention, generally speaking, provides for high-efficiency power control of a high-efficiency (e.g., hard-limiting or switch-mode) power amplifier in such a manner as to achieve a desired modulation. In one embodiment, the spread between a maximum frequency of the desired modulation and the operating frequency of a switch-mode DC-DC converter is reduced by following the switch-mode converter with an active linear regulator. The linear regulator is designed so as to control the operating voltage of the power amplifier with sufficient bandwidth to faithfully reproduce the desired amplitude modulation waveform. The linear regulator is further designed to reject variations on its input voltage even while the output voltage is changed in response to an applied control signal. This rejection will occur even though the variations on the input voltage are of commensurate or even lower frequency than that of the controlled output variation. Amplitude modulation may be achieved by directly or effectively varying the operating voltage on the power amplifier while simultaneously achieving high efficiency in the conversion of primary DC power to the amplitude modulated output signal. High efficiency is enhanced by allowing the switch-mode DC-to-DC converter to also vary its output voltage such that the voltage drop across the linear regulator is kept at a low and relatively constant level. Time-division multiple access (TDMA) bursting capability may be combined with efficient amplitude modulation, with control of these functions being combined. In addition, the variation of average output power level in accordance with commands from a communications system may also be combined within the same structure.
Inventors
- 👤 Earl McCune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:05
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/36; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0216; H03F1/0222; H03F1/0227; H03F1/0244; H03F1/0277; H03F1/32; H03F3/00; H03F3/20; H03F3/21; H03F3/217; H03F3/2178; H03F3/24; H03G; H03G3/00; H03G3/004; H03G3/20; H03G3/30; H03G3/3036; H03G3/3042; H03G3/3047; H03F2200/00; H03F2200/504; H04; H04B; H04B1/00; H04B1/02; H04B1/04; H04B2001/0408; H04B2001/045
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
205 words
RF amplification circuitry comprising: a modulation encoder block responsive to a data input signal for producing as output signals a magnitude signal and a phase signal each describing corresponding characteristics of a desired RF output signal; a carrier generation block responsive to the phase signal and to a tuning input signal for producing an RF carrier signal having a frequency determined in accordance with the tuning input signal and having a phase modulation characteristic determined in accordance with the phase signal; a magnitude driver block responsive to the magnitude signal and to a power level input signal for producing at least one magnitude drive signal having a drive strength determined in accordance with both the magnitude signal and the power level input signal; and RF power amplifier circuitry having at least one stage and having the magnitude drive signal as a supply voltage, the RF carrier signal causing the one stage to be driven repeatedly between two states, a hard-on state and a hard-off state, without operating the stage in a linear operating region for an appreciable percentage of time, thereby producing an RF output signal; wherein the RF power amplifier circuitry is controlled without continuous or frequent feedback adjustment of the RF output signal.
Claim 2
Dependent Claim
205 words
RF amplification circuitry comprising: a modulation encoder block responsive to a data input signal for producing as output signals a magnitude signal and a phase signal each describing corresponding characteristics of a desired RF output signal; a carrier generation block responsive to the phase signal and to a tuning input signal for producing an RF carrier signal having a frequency determined in accordance with the tuning input signal and having a phase modulation characteristic determined in accordance with the phase signal; a magnitude driver block responsive to the magnitude signal and to a power level input signal for producing at least one magnitude drive signal having a drive strength determined in accordance with both the magnitude signal and the power level input signal; and RF power amplifier circuitry having at least one stage and having the magnitude drive signal as a supply voltage, the RF carrier signal causing the one stage to be driven repeatedly between two states, a hard-on state and a hard-off state, without operating the stage in a linear operating region for an appreciable percentage of time, thereby producing an RF output signal; wherein the RF power amplifier circuitry is controlled without continuous or frequent feedback adjustment of the RF output signal.
Claim 3
Dependent Claim
100 words
The apparatus of claim 1 , wherein the magnitude driver block comprises: a switch mode converter having a power input, a power output and a control input; and a regulator having a power input, a power output and a control input, the power input of the regulator being coupled to the power output of the switch-mode converter; and control circuitry responsive to the magnitude signal and the power level input signal for producing a first control signal coupled to the control input of the switch mode converter and a second control signal coupled to the control input of the regulator.
Claim 4
Dependent Claim
115 words
The apparatus of claim 2 , further comprising a plurality of amplifier modules coupled in parallel, wherein the magnitude driver block is responsive to an overall magnitude signal for generating one or more magnitude drive signals, a magnitude drive signal being applied to each of the amplifier modules, each amplifier module comprising RF power amplifier circuitry having at least one stage and having a respective magnitude drive signal as a supply voltage, the RF carrier signal causing the one stage to be driven repeatedly between two states, a hard-on state and a hard-off state, without operating the stage in a linear operating region for an appreciable percentage of time, thereby producing an RF output signal.
Claim 5
Dependent Claim
21 words
The apparatus of claim 3 , wherein separate respective magnitude drive signals are generated for each of the RF power amplifiers.
Claim 6
Dependent Claim
23 words
The apparatus of claim 3 , wherein a single magnitude drive signal is applied in common to all of the RF power amplifiers.
Claim 7
Independent Claim
195 words
A method of generating a modulated RF signal, comprising: responsive to a data input signal, producing as output signals a magnitude signal and a phase signal each describing corresponding characteristics of a desired RF output signal; responsive to the phase signal and to a tuning input signal, producing an RF carrier signal having a frequency determined in accordance with the tuning input signal and having a phase modulation characteristic determined in accordance with the phase signal; responsive to the magnitude signal and to a power level input signal, producing at least one magnitude drive signal having a drive strength determined in accordance with both the magnitude signal and the power level input signal; and applying the magnitude drive signal as a supply source to RF power amplifier circuitry having at least one stage, the RF carrier signal causing the one stage to be driven repeatedly between two states, a hard-on state and a hard-off state, without operating the stage in a linear operating region for an appreciable percentage of time, thereby producing an RF output signal; wherein the RF power amplifier circuitry is controlled without continuous or frequent feedback adjustment of the RF output signal.
Claim 8
Independent Claim
195 words
A method of generating a modulated RF signal, comprising: responsive to a data input signal, producing as output signals a magnitude signal and a phase signal each describing corresponding characteristics of a desired RF output signal; responsive to the phase signal and to a tuning input signal, producing an RF carrier signal having a frequency determined in accordance with the tuning input signal and having a phase modulation characteristic determined in accordance with the phase signal; responsive to the magnitude signal and to a power level input signal, producing at least one magnitude drive signal having a drive strength determined in accordance with both the magnitude signal and the power level input signal; and applying the magnitude drive signal as a supply source to RF power amplifier circuitry having at least one stage, the RF carrier signal causing the one stage to be driven repeatedly between two states, a hard-on state and a hard-off state, without operating the stage in a linear operating region for an appreciable percentage of time, thereby producing an RF output signal; wherein the RF power amplifier circuitry is controlled without continuous or frequent feedback adjustment of the RF output signal.
References Cited (Backward Citations)
US3413570A
Cited
US3777275A
Cited
US3900823A
Cited
US3919656A
Cited
US4178557A
Cited
US4392245A
Cited
US4743858A
Cited
US4896372A
Cited
US4717884A
Cited
US4831334A
Cited
US4804931A
Cited
US4881023A
Cited
US4972440A
Cited
US4992753A
Cited
US5251330A
Cited
US5095542A
Cited
US4994757A
Cited
US5142240A
Cited
US5276912A
Cited
US5175877A
Cited
US5126688A
Cited
US5193223A
Cited
US5369789A
Cited
US5187580A
Cited
US5697072A
Cited
US5268658A
Cited
US5247264A
Cited
US5329259A
Cited
US5420536A
Cited
US5410272A
Cited
US5604924A
Cited
US5598436A
Cited
US5329249A
Cited
US5430416A
Cited
US5652546A
Cited
US5745526A
Cited
US5920596A
Cited
EP0725478A1
Cited
US5697074A
Cited
US5825248A
Cited
US6047168A
Cited
US5705959A
Cited
US5847602A
Cited
US6256482B1
Cited
US5880633A
Cited
EP0887924A2
Cited
US5861777A
Cited
US5990735A
Cited
US5886572A
Cited
US5831475A
Cited
US6049707A
Cited
US6084468A
Cited
US5936464A
Cited
US6130910A
Cited
US6002923A
Cited
US6049703A
Cited
US5942938A
Cited
US6141541A
Cited
US6078628A
Cited
US5929776A
Cited
US6107880A
Cited
US6100756A
Cited
US6101224A
Cited
US6191653B1
Cited
US6194963B1
Cited
WO2000035080A1
Cited
US6043707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-04-22 | 2005-10-22 | 2006-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-22 | 2009-10-22 | 2010-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-22 | 2013-10-22 | 2014-04-23 | $7700.00 | Window Closed / Lapsed |