US6900692B2
Expired / Lapsed
US
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High efficiency power amplifier with multiple power modes
Assignee: Avago Technologies International Sales Pte Ltd
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Filing: 2003-05-09
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Granted: 2005-05-31
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Expires: 2023-05-09
Abstract
Abstract A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in RF applications such as mobile telephones. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units ( 130, 140, 150 , and 160 ), impedance transformer ( 170 ), and a power stage ( 120 ).
Inventors
- 👤 Junghyun Kim
- 👤 Daehee Lee
- 👤 Sanghwa Jung
- 👤 Youngwoo Kwon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:04
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/02; H04L12/16; H03; H03F; H03F3/00; H03F3/72; H03F1/00; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0277; H03F1/56; H03F2200/00; H03F2200/318; H03F2203/00; H03F2203/72; H03F2203/7231; H03F2203/7239
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
143 words
An amplifier circuit comprising: a first impedance matching unit; a fourth impedance matching unit; a first circuit branch, coupled between the first and fourth impedance matching units, comprising: a second impedance matching unit, a power stage unit, and a third impedance matching unit, coupled in series; and a second circuit branch, coupled between the first and fourth impedance matching units, comprising an impedance transformer unit, wherein in a first mode of the amplifier, the power stage unit is placed in a first state and in a second mode of the amplifier, the power stage unit is placed in a second state, and when the power stage unit is in the first state, an impedance level at an input to the impedance transformer, as viewed from the first impedance matching unit, is lower than when the power stage unit is in the second state.
Claim 2
Dependent Claim
143 words
An amplifier circuit comprising: a first impedance matching unit; a fourth impedance matching unit; a first circuit branch, coupled between the first and fourth impedance matching units, comprising: a second impedance matching unit, a power stage unit, and a third impedance matching unit, coupled in series; and a second circuit branch, coupled between the first and fourth impedance matching units, comprising an impedance transformer unit, wherein in a first mode of the amplifier, the power stage unit is placed in a first state and in a second mode of the amplifier, the power stage unit is placed in a second state, and when the power stage unit is in the first state, an impedance level at an input to the impedance transformer, as viewed from the first impedance matching unit, is lower than when the power stage unit is in the second state.
Claim 3
Dependent Claim
47 words
The amplifier circuit of claim 1 wherein the impedance level at the input of the impedance transformer unit when the power stage unit is in the first state is determined by a combination of at least the third and fourth impedance units and the impedance transformer unit.
Claim 4
Dependent Claim
50 words
The amplifier circuit of claim 1 wherein when the power stage unit is in the second state, an impedance level at an input to the second impedance matching unit, as viewed from the first impedance matching unit, is lower than when the power stage unit is in the first state.
Claim 5
Dependent Claim
51 words
The amplifier circuit of claim 1 wherein when the power stage unit is in the second state, an impedance level at an input to the impedance transformer, as viewed from the first impedance matching unit, is substantial greater than an impedance level at an input to the second impedance matching unit.
Claim 6
Dependent Claim
44 words
The amplifier circuit of claim 1 wherein an output of the second impedance matching unit is coupled to an input of the power stage unit and an output of the power stage unit is coupled to an input of the third impedance matching unit.
Claim 7
Dependent Claim
23 words
The amplifier circuit of claim 1 wherein the second branch is a bypass path and the bypass path does not include a switch.
Claim 8
Dependent Claim
24 words
The amplifier circuit of claim 1 wherein the second branch is a bypass path and the bypass path does not include a PIN diode.
Claim 9
Dependent Claim
21 words
The amplifier circuit of claim 1 wherein in the first mode, the amplifier consumes less power than in the second mode.
Claim 10
Dependent Claim
36 words
The amplifier circuit of claim 1 further comprising: a control circuit provided a control signal coupled to control the power stage unit to place the power stage unit in the first state or the second state.
Claim 11
Dependent Claim
37 words
The amplifier circuit of claim 1 wherein when the power stage unit is in the first state, the power stage unit provides a higher impedance relative to when the power stage unit is in the second state.
Claim 12
Dependent Claim
24 words
The amplifier circuit of claim 1 wherein when the power stage unit is in the second state, the power stage unit provides a gain.
Claim 13
Dependent Claim
30 words
The amplifier circuit of claim 1 wherein a gain of the amplifier circuit in the second mode is greater than a gain of the amplifier circuit is the first mode.
Claim 14
Dependent Claim
27 words
The amplifier circuit of claim 1 wherein the first branch is coupled in parallel to the second branch, and the second branch does not include a switch.
Claim 15
Dependent Claim
26 words
The amplifier circuit of claim 1 wherein the first branch is coupled in parallel to the second branch during the first mode and the second mode.
Claim 16
Dependent Claim
36 words
The amplifier circuit of claim 1 wherein when the power stage is in the first state, an impedance level at the first branch is at least about two times an impedance level at the second branch.
Claim 17
Dependent Claim
13 words
An integrated circuit comprising the amplifier circuit as recited in claim 1 .
Claim 18
Dependent Claim
14 words
A wireless telephony device comprising the amplifier circuit as recited in claim 1 .
Claim 19
Dependent Claim
14 words
A wireless transceiver device comprising the amplifier circuit as recited in claim 1 .
Claim 20
Dependent Claim
145 words
An amplifier circuit comprising: a first impedance matching unit; a fourth impedance matching unit; a first circuit branch, coupled between the first and fourth impedance matching units, comprising: a second impedance matching unit, a power stage unit, and a third impedance matching unit, coupled in series; and a second circuit branch, coupled between the first and fourth impedance matching units, comprising an impedance transformer unit, wherein in a first mode of the amplifier, the power stage unit is placed in a first state and in a second mode of the amplifier, the power stage unit is placed in a second state, and when the power stage unit is in the second state, an impedance level at an input to the second impedance matching unit, as viewed from the first impedance matching unit, is lower than when the power stage unit is in the first state.
Claim 21
Dependent Claim
145 words
An amplifier circuit comprising: a first impedance matching unit; a fourth impedance matching unit; a first circuit branch, coupled between the first and fourth impedance matching units, comprising: a second impedance matching unit, a power stage unit, and a third impedance matching unit, coupled in series; and a second circuit branch, coupled between the first and fourth impedance matching units, comprising an impedance transformer unit, wherein in a first mode of the amplifier, the power stage unit is placed in a first state and in a second mode of the amplifier, the power stage unit is placed in a second state, and when the power stage unit is in the second state, an impedance level at an input to the second impedance matching unit, as viewed from the first impedance matching unit, is lower than when the power stage unit is in the first state.
Claim 22
Dependent Claim
145 words
An amplifier circuit comprising: a first impedance matching unit; a fourth impedance matching unit; a first circuit branch, coupled between the first and fourth impedance matching units, comprising: a second impedance matching unit, a power stage unit, and a third impedance matching unit, coupled in series; and a second circuit branch, coupled between the first and fourth impedance matching units, comprising an impedance transformer unit, wherein in a first mode of the amplifier, the power stage unit is placed in a first state and in a second mode of the amplifier, the power stage unit is placed in a second state, and when the power stage unit is in the second state, an impedance level at an input to the impedance transformer, as viewed from the first impedance matching unit, is greater than an impedance level at an input to the second impedance matching unit.
Claim 23
Dependent Claim
145 words
An amplifier circuit comprising: a first impedance matching unit; a fourth impedance matching unit; a first circuit branch, coupled between the first and fourth impedance matching units, comprising: a second impedance matching unit, a power stage unit, and a third impedance matching unit, coupled in series; and a second circuit branch, coupled between the first and fourth impedance matching units, comprising an impedance transformer unit, wherein in a first mode of the amplifier, the power stage unit is placed in a first state and in a second mode of the amplifier, the power stage unit is placed in a second state, and when the power stage unit is in the second state, an impedance level at an input to the impedance transformer, as viewed from the first impedance matching unit, is greater than an impedance level at an input to the second impedance matching unit.
Claim 24
Dependent Claim
36 words
The amplifier circuit of claim 20 wherein when the power stage is in the second state, an impedance level at the second branch is at least about two times an impedance level at the first branch.
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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) | 2008-05-30 | 2008-11-29 | 2009-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-05-30 | 2012-11-29 | 2013-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-05-30 | 2016-11-29 | 2017-05-31 | $7700.00 | Window Closed / Lapsed |