US6166598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power amplifying circuit with supply adjust to control adjacent and alternate channel power
Assignee: Motorola Mobility LLC
•
Filing: 1999-07-22
•
Granted: 2000-12-26
•
Expires: 2019-07-22
Abstract
Abstract A power amplifying circuit with supply adjust for control of adjacent and alternate channel power. A power amplifier amplifies an input signal to produce an amplified signal. A peak-to-average detector detects peak levels of the amplified signal and an average level of the amplified signal and produces an indication of the peak levels and the average level. A controller adjusts a supply voltage to the power amplifier responsive to the indication to cause the supply voltage to lower as a difference between the peak levels and the average level increases above a predetermined level and to cause the supply voltage to elevate as the difference decreases below the predetermined level.
Inventors
- 👤 David Schlueter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:40
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/22; H04W52/225; H01; H01Q; H01Q11/00; H01Q11/12; H03F1/00; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0216; H03F1/0233; H03G; H03G3/00; H03G3/004; H03G3/20; H03G3/30; H03G3/3036; H03G3/3042; H03G3/3047; H04B; H04B1/00; H04B1/02; H04B1/04; H04B1/0475; H04L; H04L27/00; H04L27/32; H04L27/34; H04L27/36; H04L27/366; H04L27/367; H04L27/368; H04W52/52; H04W84/00; H04W84/02; H04W84/04; H04W84/042; H04W88/00; H04W88/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
143 words
A power amplifying circuit comprising: a power amplifier for amplifying an input signal to produce an amplified signal; a peak-to-average detector coupled to an output of the power amplifier, the peak-to-average detector to detect peak levels of the amplified signal and an average level of the amplified signal and to provide an indication of the peak levels and an indication of the average level; and a controller coupled to the peak-to-average detector and the power amplifier, the controller for adjusting a supply voltage to the power amplifier responsive to the indication of the peak levels and the indication of the average level to cause the supply voltage to lower as a peak-to-average ratio of the amplified signal increases above a predetermined level and to cause the supply voltage to elevate as the peak-to-average ratio of the amplified signal decreases below the predetermined level.
Claim 2
Dependent Claim
143 words
A power amplifying circuit comprising: a power amplifier for amplifying an input signal to produce an amplified signal; a peak-to-average detector coupled to an output of the power amplifier, the peak-to-average detector to detect peak levels of the amplified signal and an average level of the amplified signal and to provide an indication of the peak levels and an indication of the average level; and a controller coupled to the peak-to-average detector and the power amplifier, the controller for adjusting a supply voltage to the power amplifier responsive to the indication of the peak levels and the indication of the average level to cause the supply voltage to lower as a peak-to-average ratio of the amplified signal increases above a predetermined level and to cause the supply voltage to elevate as the peak-to-average ratio of the amplified signal decreases below the predetermined level.
Claim 3
Dependent Claim
66 words
The power amplifying circuit as in claim 1 wherein the controller adjusts the supply voltage to the power amplifier to cause the supply voltage to lower as a mean peak-to-average ratio of the amplified signal increases above a desired mean peak-to-average ratio and to cause the supply voltage to elevate as the mean peak-to-average ratio of the amplified signal decreases below the desired mean peak-to-average ratio.
Claim 4
Dependent Claim
29 words
The power amplifying circuit as in claim 2 wherein the controller causes the power amplifier to maintain the mean peak-to-average ratio substantially equal to the desired mean peak-to-average ratio.
Claim 5
Dependent Claim
41 words
The power amplifying circuit as in claim 3 wherein the mean peak-to-average ratio comprises a ratio of an average of the peak levels of the amplified signal to the average level of the amplified signal over a predetermined period of time.
Claim 6
Dependent Claim
17 words
The power amplifying circuit as in claim 4 wherein the peak-to-average detector calculates the mean peak-to-average ratio.
Claim 7
Dependent Claim
16 words
The power amplifying circuit as in claim 4 wherein the controller calculates the mean peak-to-average ratio.
Claim 8
Dependent Claim
62 words
The power amplifying circuit as in claim 1 further comprising a variable gain circuit coupled to an input of the power amplifier, wherein the controller adjusts a gain of the variable gain circuit responsive to the indication of the average level of the amplified signal to cause the average level of the amplified signal to substantially equal a desired average output power.
Claim 9
Dependent Claim
54 words
The power amplifying circuit as in claim 1 further comprising a voltage control circuit coupled between the controller and the power amplifier, wherein the controller produces a control signal responsive to the indication of the peak levels and the average power, the voltage control circuit processing the control signal to produce the supply voltage.
Claim 10
Dependent Claim
25 words
The power amplifying circuit as in claim 8 wherein the voltage control circuit comprises one of a linear voltage regulator and a switching voltage regulator.
Claim 11
Dependent Claim
147 words
A power amplifying circuit for use in a portable radiotelephone, the power amplifying circuit comprising: a power amplifier for amplifying an input signal to produce an amplified signal; a peak-to-average detector coupled to an output of the power amplifier, the peak-to-average detector to detect peak levels of the amplified signal and an average power of the amplified signal and to provide an indication of the peak levels and the average power; and a controller coupled to the peak-to-average detector and the power amplifier, the controller for adjusting a supply voltage to the power amplifier responsive to the indication of the peak levels and the average power to cause the supply voltage to lower as a mean peak-to-average ratio of the amplified signal increases above a desired peak-to-average ratio and to cause the supply voltage to elevate as the mean peak-to-average ratio decreases below the desired peak-to-average ratio.
Claim 12
Dependent Claim
147 words
A power amplifying circuit for use in a portable radiotelephone, the power amplifying circuit comprising: a power amplifier for amplifying an input signal to produce an amplified signal; a peak-to-average detector coupled to an output of the power amplifier, the peak-to-average detector to detect peak levels of the amplified signal and an average power of the amplified signal and to provide an indication of the peak levels and the average power; and a controller coupled to the peak-to-average detector and the power amplifier, the controller for adjusting a supply voltage to the power amplifier responsive to the indication of the peak levels and the average power to cause the supply voltage to lower as a mean peak-to-average ratio of the amplified signal increases above a desired peak-to-average ratio and to cause the supply voltage to elevate as the mean peak-to-average ratio decreases below the desired peak-to-average ratio.
Claim 13
Dependent Claim
28 words
The power amplifying circuit as in claim 10 wherein the controller causes the power amplifier to maintain the mean peak-to-average ratio substantially equal to the desired peak-to-average ratio.
Claim 14
Dependent Claim
33 words
The power amplifying circuit as in claim 10 wherein the mean peak-to-average ratio comprises a ratio of an average of the peak levels to the average power over a predetermined period of time.
Claim 15
Dependent Claim
17 words
The power amplifying circuit as in claim 12 wherein the peak-to-average detector calculates the mean peak-to-average ratio.
Claim 16
Dependent Claim
16 words
The power amplifying circuit as in claim 12 wherein the controller calculates the mean peak-to-average ratio.
Claim 17
Dependent Claim
54 words
The power amplifying circuit as in claim 10 further comprising a variable gain circuit coupled to an input of the power amplifier, wherein the controller controls a gain of the variable gain circuit responsive to the indication of the average power to cause the average power to substantially equal a desired average output power.
Claim 18
Dependent Claim
54 words
The power amplifying circuit as in claim 10 further comprising a voltage control circuit coupled between the controller and the power amplifier, wherein the controller produces a control signal responsive to the indication of the peak levels and the average power, the voltage control circuit processing the control signal to produce the supply voltage.
Claim 19
Dependent Claim
25 words
The power amplifying circuit as in claim 16 wherein the voltage control circuit comprises one of a linear voltage regulator and a switching voltage regulator.
Claim 20
Dependent Claim
41 words
The power amplifying circuit as in claim 10 wherein the input signal and the amplified signal have an amplitude modulation envelope resulting from a linear modulation scheme selected from the group consisting of phase-shift keying (PSK) and quadrature amplitude modulation (QAM).
Claim 21
Independent Claim
81 words
A method of amplifying a radio frequency (RF) signal, the method comprising: amplifying the RF signal with a power amplifier to produce an amplified signal; detecting an average output level and peak levels of the amplified signal; calculating a peak-to-average ratio of the amplified signal; and lowering a supply voltage to the power amplifier when the peak-to-average ratio increases above a predetermined level, or elevating the supply voltage to the power amplifier when the peak-to-average ratio decreases below a predetermined level.
Claim 22
Independent Claim
81 words
A method of amplifying a radio frequency (RF) signal, the method comprising: amplifying the RF signal with a power amplifier to produce an amplified signal; detecting an average output level and peak levels of the amplified signal; calculating a peak-to-average ratio of the amplified signal; and lowering a supply voltage to the power amplifier when the peak-to-average ratio increases above a predetermined level, or elevating the supply voltage to the power amplifier when the peak-to-average ratio decreases below a predetermined level.
Claim 23
Dependent Claim
26 words
The method as in claim 19 further comprising adjusting an average amplitude of the RF signal to produce the amplified signal with a desired average power.
Claim 24
Dependent Claim
27 words
The method as in claim 19 wherein the peak-to-average ratio comprises a maximum peak-to-average ratio over a period of time or over a number of peak levels.
Claim 25
Dependent Claim
27 words
The method as in claim 19 wherein the peak-to-average ratio comprises a mean peak-to-average ratio over a period of time or over a number of peak levels.
Claim 26
Dependent Claim
150 words
A power amplifying circuit comprising: a power amplifier for amplifying an input signal to produce an amplified signal; a peak-to-average detector coupled to an output of the power amplifier, the peak-to-average detector to detect a peak level of the amplified signal and an average level of the amplified signal and to provide an indication of a difference between the peak level and the average level; and a controller coupled to the power amplifier and the peak-to-average detector, the controller for adjusting a supply voltage to the power amplifier responsive to the indication of the difference between the peak level and the average level to cause the supply voltage to lower as the difference between the peak level and the average level increases above a predetermined level and to cause the supply voltage to elevate as the difference between the peak level and the average level decreases below the predetermined level.
Claim 27
Dependent Claim
150 words
A power amplifying circuit comprising: a power amplifier for amplifying an input signal to produce an amplified signal; a peak-to-average detector coupled to an output of the power amplifier, the peak-to-average detector to detect a peak level of the amplified signal and an average level of the amplified signal and to provide an indication of a difference between the peak level and the average level; and a controller coupled to the power amplifier and the peak-to-average detector, the controller for adjusting a supply voltage to the power amplifier responsive to the indication of the difference between the peak level and the average level to cause the supply voltage to lower as the difference between the peak level and the average level increases above a predetermined level and to cause the supply voltage to elevate as the difference between the peak level and the average level decreases below the predetermined level.
Claim 28
Dependent Claim
33 words
The power amplifying circuit as in claim 23 wherein the controller causes the power amplifier to maintain the difference between the peak level and the average level substantially equal to a predetermined level.
References Cited (Backward Citations)
US4041395A
Cited
US4147985A
Cited
US4165493A
Cited
US4348644A
Cited
US4370622A
Cited
US4356458A
Cited
US4442407A
Cited
US4546313A
Cited
US4647871A
Cited
US4827219A
Cited
US4890062A
Cited
US4990866A
Cited
US4924191A
Cited
US5170496A
Cited
US5251330A
Cited
US5113414A
Cited
US4994757A
Cited
US4985686A
Cited
US5101172A
Cited
US5276912A
Cited
US5408691A
Cited
US5060294A
Cited
US5361403A
Cited
US5278997A
Cited
US5195045A
Cited
US5220276A
Cited
US5329244A
Cited
US5428828A
Cited
US5300894A
Cited
US5302914A
Cited
US5598127A
Cited
US5420536A
Cited
US5351016A
Cited
US5339041A
Cited
US5564086A
Cited
US5483680A
Cited
EP0685936A2
Cited
US5589796A
Cited
US5640691A
Cited
US5673001A
Cited
US5742201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-12-26 | 2004-06-26 | 2004-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-26 | 2008-06-26 | 2008-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-26 | 2012-06-26 | 2012-12-26 | $7700.00 | Window Closed / Lapsed |