US6242986B1
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US
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Multiple-band amplifier
Assignee: Skyworks Solutions Inc
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Filing: 1998-05-18
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Granted: 2001-06-05
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Expires: 2018-05-18
Abstract
Abstract A GaAs MMIC dual-band amplifier for wireless communications is disclosed for operation at either the 800 MHz or the 1900 MHz band and it provides desired gain and input and output impedance. Switching impedance networks are used at the input and output of the amplifier to provide matching input impedance and desired output impedance for operation in the two bands. Switching impedance networks are also used between any successive stages of the amplifier to provide proper interstage impedance. The dual band amplifier includes a bias control circuit which biases the amplifier to operate in A, B, AB or C mode. The amplifier can be used for the AMPS 800 or the GSM 900 operation or any other cellular operation such as the PCS 1900 and the it can be switched between the two operations by simply applying a proper control signal to the amplifier.
Inventors
- 👤 Aharon Adar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:57
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0261; H03F3/00; H03F3/189; H03F3/19; H03F3/193; H03F3/1935; H03F3/20; H03F3/24; H03F3/72; H04; H04B; H04B1/00; H04B1/02; H04B1/04; H04B1/0483; H04B1/38; H04B1/40; H04B1/403; H04B1/406; H03F2200/00; H03F2200/111; H03F2200/39; H03F2200/429; H03F2200/432; H03F2203/00; H03F2203/72; H03F2203/7206; H03F2203/7215; H03F2203/7221; H03F2203/7227; H03F2203/7236; H04B1/005; H04B2001/0408
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
115 words
Amplifying apparatus for amplifying a signal having a frequency of one of a plurality of predetermined frequencies, comprising: a plurality of amplifiers each for operating at one of the predetermined frequencies; and a control circuit responsive to a control signal for enabling the amplifier for operating at the frequency of such signal while preventing the other amplifiers from operation, wherein each of the amplifiers comprises at least one amplifying stage, a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency that each corresponding amplifier is configured to operate, and output impedance means for providing predetermined output impedance at the signal frequency the each amplifier is configured to operate.
Claim 2
Dependent Claim
115 words
Amplifying apparatus for amplifying a signal having a frequency of one of a plurality of predetermined frequencies, comprising: a plurality of amplifiers each for operating at one of the predetermined frequencies; and a control circuit responsive to a control signal for enabling the amplifier for operating at the frequency of such signal while preventing the other amplifiers from operation, wherein each of the amplifiers comprises at least one amplifying stage, a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency that each corresponding amplifier is configured to operate, and output impedance means for providing predetermined output impedance at the signal frequency the each amplifier is configured to operate.
Claim 3
Dependent Claim
55 words
The amplifying apparatus of claim 1 wherein the at least one amplifying stage includes at lease one amplifying transistor, and wherein the control circuit means operate to enable an amplifier by turning the amplifying transistor(s) in the amplifier on, or to prevent an amplifier from operation by turning the amplifying transistor(s) in the amplifier off.
Claim 4
Dependent Claim
52 words
The amplifying apparatus of claim 1 wherein each of the amplifiers comprises a plurality of amplifying stages arranged as a cascade, and wherein each of the amplifiers further comprises interstage impedance means for providing predetermined inter-stage impedance between two successive amplifying stages at the frequency the each amplifier is suitable to operate.
Claim 5
Dependent Claim
36 words
The amplifying apparatus of claim 1 wherein, in each amplifier, the output impedance of a preceding stage approximately matches the input impedance of a following stage at the frequency the each amplifier is configured to operate.
Claim 6
Dependent Claim
23 words
The amplifying apparatus of claim 1 wherein the plurality of amplifiers and the control circuit are formed as a monolithic GaAs integrated circuit.
Claim 7
Dependent Claim
16 words
The amplifying apparatus of claim 1 wherein the control signal is received from a base station.
Claim 8
Dependent Claim
115 words
An amplifying apparatus comprising: means for receiving a plurality of signals each having one of a plurality of predetermined frequencies; a plurality of amplifiers each configured to operate at one of the plurality of predetermined frequencies and configured to receive one of the signals having a corresponding one of the plurality of predetermined frequencies; a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency that each corresponding amplifier is configured to operate; and a control circuit responsive to a control signal for enabling one of the plurality of amplifiers configured to operate at the one of the plurality of predetermined frequencies while preventing operation of the other amplifiers.
Claim 9
Dependent Claim
115 words
An amplifying apparatus comprising: means for receiving a plurality of signals each having one of a plurality of predetermined frequencies; a plurality of amplifiers each configured to operate at one of the plurality of predetermined frequencies and configured to receive one of the signals having a corresponding one of the plurality of predetermined frequencies; a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency that each corresponding amplifier is configured to operate; and a control circuit responsive to a control signal for enabling one of the plurality of amplifiers configured to operate at the one of the plurality of predetermined frequencies while preventing operation of the other amplifiers.
Claim 10
Dependent Claim
40 words
The amplifying apparatus of claim 7 wherein each of the amplifiers comprises: at least one amplifying stage; and an output impedance network configured to provide predetermined output impedance at the predetermined frequency that the each amplifier is configured to operate.
Claim 11
Dependent Claim
60 words
The amplifying apparatus of claim 8 wherein the at least one amplifying stage includes at least one amplifying transistor, and wherein the control circuit operates to enable the amplifier by turning the at least one amplifying transistor in the amplifier on or to prevent operation of the amplifier by turning the at least one amplifying transistor in the amplifier off.
Claim 12
Dependent Claim
53 words
The amplifying apparatus of claim 8 wherein each of the amplifiers comprises a plurality of amplifying stages arranged as a cascade, and wherein each of the amplifiers further comprises interstage impedance means for providing predetermined interstage impedance between two successive amplifying stages at the predetermined frequency that each amplifier is configured to operate.
Claim 13
Dependent Claim
38 words
The amplifying apparatus of claim 10 wherein, in each amplifier, the output impedance of a preceding stage approximately matches the input impedance of a following stage at the predetermined frequency at which each amplifier is configured to operate.
Claim 14
Dependent Claim
27 words
The amplifying apparatus of claim 7 wherein the control circuit further operates to bias the selected amplifier to operate in one of a plurality of operating modes.
Claim 15
Dependent Claim
23 words
The amplifying apparatus of claim 7 wherein the plurality of amplifiers and the control circuit are formed as a monolithic GaAs integrated circuit.
Claim 16
Dependent Claim
16 words
The amplifying apparatus of claim 7 wherein the control signal is received from a base station.
Claim 17
Dependent Claim
112 words
Amplifying apparatus comprising: means for receiving a plurality of signals, each having one of a plurality of predetermined frequencies; a plurality of amplifiers, each configured to operate at one of the plurality of predetermined frequencies and configured to receive one of the signals having the corresponding predetermined frequency; and a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency at which each corresponding amplifier is configured to operate; a plurality of amplifying stages arranged as a cascade, and a plurality of interstage impedance networks for providing predetermined impedance between two successive amplifying stages at the frequency at which the respective amplifier is configured to operate.
Claim 18
Dependent Claim
112 words
Amplifying apparatus comprising: means for receiving a plurality of signals, each having one of a plurality of predetermined frequencies; a plurality of amplifiers, each configured to operate at one of the plurality of predetermined frequencies and configured to receive one of the signals having the corresponding predetermined frequency; and a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency at which each corresponding amplifier is configured to operate; a plurality of amplifying stages arranged as a cascade, and a plurality of interstage impedance networks for providing predetermined impedance between two successive amplifying stages at the frequency at which the respective amplifier is configured to operate.
Claim 19
Dependent Claim
149 words
Amplifying apparatus comprising: means for receiving a plurality of signals, each having one of a plurality of predetermined frequencies; a plurality of amplifiers, each configured to operate at one of the plurality of predetermined frequencies and configured to receive one of the signals having the corresponding predetermined frequency; and a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency at which each corresponding amplifier is configured to operate; a plurality of amplifying stages arranged as a cascade, and a plurality of interstage impedance networks for providing predetermined impedance between two successive amplifying stages at the frequency at which the respective amplifier is configured to operate, wherein the interstage impedance networks comprise means for selectively coupling one of a plurality of interstage impedance networks to a dc power supply in accordance with the frequency at which the respective amplifier is configured to operate.
Claim 20
Dependent Claim
149 words
Amplifying apparatus comprising: means for receiving a plurality of signals, each having one of a plurality of predetermined frequencies; a plurality of amplifiers, each configured to operate at one of the plurality of predetermined frequencies and configured to receive one of the signals having the corresponding predetermined frequency; and a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency at which each corresponding amplifier is configured to operate; a plurality of amplifying stages arranged as a cascade, and a plurality of interstage impedance networks for providing predetermined impedance between two successive amplifying stages at the frequency at which the respective amplifier is configured to operate, wherein the interstage impedance networks comprise means for selectively coupling one of a plurality of interstage impedance networks to a dc power supply in accordance with the frequency at which the respective amplifier is configured to operate.
Claim 21
Dependent Claim
150 words
Amplifying apparatus comprising: means for receiving a plurality of signals, each having one of a plurality of predetermined frequencies; a plurality of amplifiers, each configured to operate at one of the plurality of predetermined frequencies and configured to receive one of the signals having the corresponding predetermined frequency; and a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency at which each corresponding amplifier is configured to operate; a plurality of amplifying stages arranged as a cascade, and a plurality of interstage impedance networks for providing predetermined impedance between two successive amplifying stages at the frequency at which the respective amplifier is configured to operate, wherein at least one of the interstage impedance networks comprises an inductor and a transistor connected in parallel, and means to control the at least one of the interstage impedance networks by controlling the conductivity of the transistor.
Claim 22
Dependent Claim
150 words
Amplifying apparatus comprising: means for receiving a plurality of signals, each having one of a plurality of predetermined frequencies; a plurality of amplifiers, each configured to operate at one of the plurality of predetermined frequencies and configured to receive one of the signals having the corresponding predetermined frequency; and a plurality of input impedance networks each configured to provide predetermined input impedance at the signal frequency at which each corresponding amplifier is configured to operate; a plurality of amplifying stages arranged as a cascade, and a plurality of interstage impedance networks for providing predetermined impedance between two successive amplifying stages at the frequency at which the respective amplifier is configured to operate, wherein at least one of the interstage impedance networks comprises an inductor and a transistor connected in parallel, and means to control the at least one of the interstage impedance networks by controlling the conductivity of the transistor.
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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) | 2004-06-04 | 2004-12-04 | 2005-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-06-04 | 2008-12-04 | 2009-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-06-04 | 2012-12-04 | 2013-06-05 | $7700.00 | Window Closed / Lapsed |