US5880633A
Expired / Lapsed
US
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High efficiency power amplifier
Assignee: Google Technology Holdings LLC
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Filing: 1997-05-08
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Granted: 1999-03-09
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Expires: 2017-05-08
Abstract
Abstract A high efficiency power amplifier 600 consists of a non-linear radio frequency (RF) Doherty power amplifier (67) and a linearization circuit, such as, for example, a Cartesian Feedback circuit (33), an RF feedback circuit (38), an IF feedback circuit (48), or a feedforward circuit (55). The Doherty amplification stage (67) may be implemented with a BJTs, FETs, HBTs, H-FETs, PHEMTs, or any other type power transistor technology or device.
Inventors
- 👤 Gustavo D. Leizerovich
- 👤 Lawrence F. Cygan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:25
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/345; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0216; H03F1/0222; H03F1/0288; H03F1/32; H03F1/3241; H03F1/3247; H03F2200/00; H03F2200/57
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
85 words
A high efficiency power amplifier comprising: a Doherty amplifier stage, having an input path, for amplifying an input signal and producing an output corresponding thereto, said Doherty amplifier stage exhibiting non-linear amplitude and phase characteristics; and a Cartesian feedback linearization circuit, coupled to the Doherty amplifier stage, said Cartesian feedback linearization circuit responsive to receipt of the output for generating an error signal that is subtracted from the input path in order to linearize and correct the non-linear amplitude and phase characteristics of the output.
Claim 2
Dependent Claim
85 words
A high efficiency power amplifier comprising: a Doherty amplifier stage, having an input path, for amplifying an input signal and producing an output corresponding thereto, said Doherty amplifier stage exhibiting non-linear amplitude and phase characteristics; and a Cartesian feedback linearization circuit, coupled to the Doherty amplifier stage, said Cartesian feedback linearization circuit responsive to receipt of the output for generating an error signal that is subtracted from the input path in order to linearize and correct the non-linear amplitude and phase characteristics of the output.
Claim 3
Dependent Claim
51 words
A high efficiency power amplifier according to claim 1 wherein said Doherty amplifier stage comprises transistors selected from the group consisting of: field effect transistor (FET) devices; heterostructure field effect transistor (H-FET) devices; bipolar junction transistor (BJT) devices; hetero junction bipolar transistor (HBT) devices; and pseudomorphic high electron mobility transistor (PHEMT).
Claim 4
Dependent Claim
19 words
A high efficiency power amplifier according to claim 1 wherein said linearization circuit comprises a RF feedback linearization circuit.
Claim 5
Dependent Claim
21 words
A high efficiency power amplifier according to claim 1 wherein said linearization circuit comprises an intermediate frequency (IF) feedback linearization circuit.
Claim 6
Dependent Claim
26 words
A high efficiency power amplifier according to claim 1 wherein said Doherty amplifier stage operates over a plurality frequencies ranging from 800 MHz to 900 MHz.
Claim 7
Dependent Claim
26 words
A high efficiency power amplifier according to claim 1 wherein said Doherty amplifier stage operates over a plurality frequencies ranging from 1.4 GHz to 1.6 GHz.
Claim 8
Dependent Claim
25 words
A high efficiency power amplifier according to claim 1 wherein said Doherty amplifier stage provides a power out of between 5 milliwatts and 10 watts.
Claim 9
Dependent Claim
138 words
A high efficiency power amplifier circuit having an input path, said circuit comprising: a power splitter for receiving an input signal and providing a first and a second output signal, said first and said second output signal having a different phase; an amplifier stage, coupled to the power splitter, having a carrier amplifier for amplifying said first output signal and a peak amplifier for amplifying said second output signal; a combiner, coupled to the amplifier stage, for producing an output corresponding thereto, said output exhibiting non-linear amplitude and phase characteristics; and a Cartesian feedback linearization circuit, coupled to the combiner, said Cartesian feedback linearization circuit responsive to receipt of the output for generating an error signal that is subtracted from the input path in order to linearize and correct the non-linear amplitude and phase characteristics of the output.
Claim 10
Dependent Claim
138 words
A high efficiency power amplifier circuit having an input path, said circuit comprising: a power splitter for receiving an input signal and providing a first and a second output signal, said first and said second output signal having a different phase; an amplifier stage, coupled to the power splitter, having a carrier amplifier for amplifying said first output signal and a peak amplifier for amplifying said second output signal; a combiner, coupled to the amplifier stage, for producing an output corresponding thereto, said output exhibiting non-linear amplitude and phase characteristics; and a Cartesian feedback linearization circuit, coupled to the combiner, said Cartesian feedback linearization circuit responsive to receipt of the output for generating an error signal that is subtracted from the input path in order to linearize and correct the non-linear amplitude and phase characteristics of the output.
Claim 11
Dependent Claim
18 words
A high efficiency power amplifier according to claim 8 wherein said carrier amplifier comprises a multiple stage device.
Claim 12
Dependent Claim
18 words
A high efficiency power amplifier according to claim 8 wherein said peak amplifier comprises a multiple stage device.
Claim 13
Dependent Claim
25 words
A high efficiency power amplifier according to claim 8 wherein said amplifier stage operates over a plurality frequencies ranging from 800 MHz to 900 MHz.
Claim 14
Dependent Claim
25 words
A high efficiency power amplifier according to claim 8 wherein said amplifier stage operates over a plurality frequencies ranging from 1.4 GHz to 1.6 GHz.
Claim 15
Dependent Claim
24 words
A high efficiency power amplifier according to claim 8 wherein said amplifier stage provides a power out of between 5 milliwatts and 10 watts.
Claim 16
Dependent Claim
76 words
A radio frequency (RF) communications device having a high efficiency power amplifier, said power amplifier comprising: a Doherty amplifier stage for amplifying an input and producing an output corresponding thereto, said Doherty amplifier stage exhibiting non-linear amplitude and phase characteristics; and a Cartesian feedback linearization circuit, coupled to the Doherty amplifier stage, said Cartesian feedback linearization circuit responsive to receipt of the output for linearizing and correcting the non-linear amplitude and phase characteristics of the output.
Claim 17
Dependent Claim
76 words
A radio frequency (RF) communications device having a high efficiency power amplifier, said power amplifier comprising: a Doherty amplifier stage for amplifying an input and producing an output corresponding thereto, said Doherty amplifier stage exhibiting non-linear amplitude and phase characteristics; and a Cartesian feedback linearization circuit, coupled to the Doherty amplifier stage, said Cartesian feedback linearization circuit responsive to receipt of the output for linearizing and correcting the non-linear amplitude and phase characteristics of the output.
Claim 18
Dependent Claim
20 words
A radio frequency (RF) communications device according to claim 14 wherein said Doherty amplifier stage comprises a multiple stage device.
Claim 19
Dependent Claim
27 words
A radio frequency (RF) communications device according to claim 14 wherein said Doherty amplifier stage operates over a plurality frequencies ranging from 800 MHz to 900 MHz.
Claim 20
Dependent Claim
27 words
A radio frequency (RF) communications device according to claim 14 wherein said Doherty amplifier stage operates over a plurality frequencies ranging from 1.4 GHz to 1.6 GHz.
Claim 21
Dependent Claim
26 words
A radio frequency (RF) communications device according to claim 14 wherein said Doherty amplifier stage provides a power out of between 5 milliwatts and 10 watts.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-08 | 2002-09-07 | 2003-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-08 | 2006-09-07 | 2007-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-08 | 2010-09-07 | 2011-03-09 | $7700.00 | Window Closed / Lapsed |