US6445249B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of phase component of error signal to reduce variation of phase component of output signal of power amplifier
Assignee: Motorola Solutions Inc
•
Filing: 2001-08-08
•
Granted: 2002-09-03
•
Expires: 2021-08-08
Abstract
Abstract System ( 100 ) is coupled with power amplifier ( 106 ). Generation component ( 166 ) generates error signal ( 110 ) based at least in part on an input signal ( 144 ) for the system ( 100 ). The error signal ( 110 ) includes a phase component. The input signal ( 144 ) includes an envelope component. Modification component ( 130 ) modifies the phase component of the error signal ( 110 ) in response to the envelope component of the input signal to reduce variation of a phase component of the power amplifier output signal ( 194 ).
Inventors
- 👤 Andrew Merritt Khan
- 👤 George Francis Opas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:50
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0216; H03F1/0222; H03F1/32; H03F1/3241; H03F1/3282; H03F1/34; H03F1/345
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
83 words
A method, comprising the steps of: generating an error signal based at least in part on an input signal for a system that is coupled with a power amplifier, wherein the error signal includes a phase component, wherein the input signal includes an envelope component; and modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to reduce variation of a phase component of an output signal from the power amplifier.
Claim 2
Independent Claim
83 words
A method, comprising the steps of: generating an error signal based at least in part on an input signal for a system that is coupled with a power amplifier, wherein the error signal includes a phase component, wherein the input signal includes an envelope component; and modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to reduce variation of a phase component of an output signal from the power amplifier.
Claim 3
Dependent Claim
72 words
The method of claim 1 , wherein the step of generating the error signal based at least in part on the input signal for the system that is coupled with the power amplifier comprises the step of generating the error signal through employment of a comparison of a signal based on the input signal with a feedback signal that is based on a portion of the output signal from the power amplifier.
Claim 4
Dependent Claim
78 words
The method of claim 1 , wherein the step of modifying the phase component of the error signal in response to the envelope component of the input signal to reduce variation of the phase component of the output signal from the power amplifier comprises the step of modifying the phase component of a signal based on the error signal to approximately compensate for a predicted modification by the power amplifier of the phase component of the output signal.
Claim 5
Dependent Claim
68 words
The method of claim 1 , wherein the step of modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to reduce variation of the phase component of the output signal from the power amplifier comprises the step of inputting a signal based on the error signal with a modified phase component to the power amplifier.
Claim 6
Dependent Claim
86 words
The method of claim 1 , wherein the step of modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to reduce variation of the phase component of the output signal from the power amplifier comprises the step of promoting approximate maintenance of a predetermined phase margin of a feedback signal while the feedback signal is compared to a signal based on the input signal as the envelope component of the input signal varies.
Claim 7
Independent Claim
139 words
A method, comprising the steps of: generating an error signal based at least in part on an input signal for a system that is coupled with a power amplifier, wherein a signal based on the error signal includes a modified phase component, wherein the input signal includes an envelope component, wherein the power amplifier outputs an output signal that is based on the error signal having the modified phase component; and promoting approximate maintenance of a predetermined phase margin of a feedback signal when the feedback signal is compared to a signal based on the input signal by modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to approximately compensate for a predicted modification by the power amplifier of a phase component of the output signal.
Claim 8
Independent Claim
139 words
A method, comprising the steps of: generating an error signal based at least in part on an input signal for a system that is coupled with a power amplifier, wherein a signal based on the error signal includes a modified phase component, wherein the input signal includes an envelope component, wherein the power amplifier outputs an output signal that is based on the error signal having the modified phase component; and promoting approximate maintenance of a predetermined phase margin of a feedback signal when the feedback signal is compared to a signal based on the input signal by modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to approximately compensate for a predicted modification by the power amplifier of a phase component of the output signal.
Claim 9
Dependent Claim
100 words
The method of claim 6 , wherein the step of promoting approximate maintenance of the predetermined phase margin of the feedback signal when the feedback signal is compared to a signal based on the input signal by modifying the phase component of the error signal in response to the envelope component of the input signal to approximately compensate for the predicted modification by the power amplifier of the phase component of the output signal comprises the step of reducing variation of the phase component of the output signal as the envelope component of the input signal traverses a dynamic range.
Claim 10
Dependent Claim
136 words
The method of claim 6 , wherein the predicted modification by the power amplifier of the phase component of the output signal comprises a particular variation of the phase component of the output signal promoted by the power amplifier, and wherein the step of promoting approximate maintenance of the predetermined phase margin of the feedback signal when the feedback signal is compared to a signal based on the input signal by modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to approximately compensate for the predicted modification by the power amplifier of the phase component of the output signal comprises the step of reducing and/or approximately eliminating the particular variation of the phase component of the output signal promoted by the power amplifier.
Claim 11
Dependent Claim
76 words
The method of claim 8 , wherein the step of reducing and/or approximately eliminating the particular variation of the phase component of the output signal promoted by the power amplifier comprises the step of adding a phase shift to a signal based on the error signal approximately equal to in magnitude and opposite in direction relative to a direction of the particular variation of the phase component of the output signal promoted by the power amplifier.
Claim 12
Dependent Claim
54 words
The system of claim 6 , wherein the generation component that generates the error signal based at least in part on the input signal for the system comprises a generation component that compares the input signal to a feedback signal that is based on a portion of the output signal from the power amplifier.
Claim 13
Dependent Claim
76 words
The system of claim 6 , wherein the modification component that modifies the phase component of the error signal in response to the envelope component of the input signal to reduce variation of a phase component of an output signal from the power amplifier comprises a modification component that modifies the phase component of the error signal to approximately compensate for a predicted modification by the power amplifier of the phase component of the output signal.
Claim 14
Dependent Claim
58 words
The method of claim 6 , wherein the step of generating the error signal based at least in part on the input signal for the system that is coupled with the power amplifier comprises the step of employing one or more of Cartesian feedback, radio frequency feedback, intermediate frequency feedback and polar feedback to generate the error signal.
Claim 15
Independent Claim
88 words
A system that is coupled with a power amplifier, comprising: a generation component that generates an error signal based at least in part on an input signal for the system, wherein the error signal includes a phase component wherein the input signal includes an envelope component; and a modification component that modifies the phase component of a signal based on the error signal in response to the envelope component of the input signal to reduce variation of a phase component of an output signal from the power amplifier.
Claim 16
Independent Claim
88 words
A system that is coupled with a power amplifier, comprising: a generation component that generates an error signal based at least in part on an input signal for the system, wherein the error signal includes a phase component wherein the input signal includes an envelope component; and a modification component that modifies the phase component of a signal based on the error signal in response to the envelope component of the input signal to reduce variation of a phase component of an output signal from the power amplifier.
Claim 17
Dependent Claim
70 words
The system of claim 13 , wherein the modification component that modifies the phase component of a signal based on the error signal in response to the envelope component of the input signal to reduce variation of a phase component of an output signal from the power amplifier comprises a modification component that transmits a signal based on the error signal with a modified phase component to the power amplifier.
Claim 18
Dependent Claim
68 words
The system of claim 13 , wherein the generation component that generates the error signal based at least in part on the input signal for the system comprises a generation component that promotes an approximate maintenance of a predetermined phase margin of a feedback signal while the feedback signal is compared to a signal based on the input signal as the envelope component of the input signal varies.
Claim 19
Independent Claim
149 words
A system that is coupled with a power amplifier, comprising: a generation component that generates an error signal based at least in part on an input signal for the system, wherein a signal based on the error signal includes a modified phase component, wherein the input signal includes an envelope component, wherein the power amplifier outputs an output signal that is based on a signal based on the error signal having the modified phase component; and a modification component that promotes an approximate maintenance of a predetermined phase margin of a feedback signal when the feedback signal is compared to a signal based on the input signal by modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to approximately compensate for a predicted modification by the power amplifier of a phase component of the output signal.
Claim 20
Independent Claim
149 words
A system that is coupled with a power amplifier, comprising: a generation component that generates an error signal based at least in part on an input signal for the system, wherein a signal based on the error signal includes a modified phase component, wherein the input signal includes an envelope component, wherein the power amplifier outputs an output signal that is based on a signal based on the error signal having the modified phase component; and a modification component that promotes an approximate maintenance of a predetermined phase margin of a feedback signal when the feedback signal is compared to a signal based on the input signal by modifying the phase component of a signal based on the error signal in response to the envelope component of the input signal to approximately compensate for a predicted modification by the power amplifier of a phase component of the output signal.
Claim 21
Dependent Claim
56 words
The system of claim 16 , wherein the modification component that approximately compensates for the predicted modification by the power amplifier of a phase component of the output signal comprises a modification component that reduces variation of the phase component of the output signal as the envelope component of the input signal traverses a dynamic range.
Claim 22
Dependent Claim
84 words
The system of claim 16 , wherein the predicted modification by the power amplifier of the phase component of the output signal comprises a particular variation of the phase component promoted by the power amplifier, and wherein the modification component that approximately compensates for a predicted modification by the power amplifier of a phase component of the output signal comprises a modification component that reduces and/or approximately eliminates the particular variation of the phase component of the output signal promoted by the power amplifier.
Claim 23
Dependent Claim
42 words
The system of claim 18 , further comprising a supply modulator that modulates a supply voltage for the power amplifier to promote an increase in operating power efficiency of the power amplifier by transmitting an envelope modulated signal to the power amplifier.
Claim 24
Dependent Claim
53 words
The system of claim 18 , wherein the generation component that generates the error signal based at least in part on the input signal for the system comprises a generation component that employs one or more of Cartesian feedback, radio frequency feedback, intermediate frequency feedback and polar feedback to generate the error signal.
Claim 25
Dependent Claim
74 words
The system of claim 16 , wherein the modification component that reduces and/or approximately eliminates the particular variation of the phase component of the output signal promoted by the power amplifier comprises a modification component that adds a phase shift to the error signal approximately equal to in magnitude and opposite in direction relative to a direction of the particular variation of the phase component of the output signal promoted by the power amplifier.
Claim 26
Dependent Claim
28 words
The system of claim 18 , further comprises a supply voltage that generates a particular modification in the phase component of the output signal of the power amplifier.
References Cited (Backward Citations)
US5142240A
Cited
US5111155A
Cited
US5420536A
Cited
US5886572A
Cited
US6175273B1
Cited
US5936464A
Cited
US6388518B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-02 | 2006-03-04 | 2006-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-02 | 2010-03-04 | 2010-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-02 | 2014-03-04 | 2014-09-03 | $7700.00 | Window Closed / Lapsed |