US5412342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power amplifier device comprising a plurality of feedforward distortion compensating circuits in parallel
Assignee: NTT Docomo Inc
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Filing: 1993-01-14
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Granted: 1995-05-02
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Expires: 2013-01-14
Abstract
Abstract For supply to first and second feedforward distortion compensating circuits 33(1), 33(2) connected in parallel, a two-divider 31 divides into signals of a common phase and a common amplitude an input or composite radio frequency signal supplied to an input terminal 11. The composite radio frequency signal collectively has a plurality of radio frequency signals of different frequencies. A two-combiner 35 combines component outputs of the feedforward circuits in inphase as an amplified output signal which is supplied to an output terminal 13. In general, N feedforward circuits (N being an integer not less than two) are connected in parallel and are supplied with the input radio frequency signal through an N-divider. Component outputs of the feedforward circuits are combined in inphase as the output signal by an N-combiner. Alternatively, the input radio frequency signal is divided into signals of a predetermined phase difference and of a common amplitude by the N-divider. In this case, the component outputs of the feedforward circuits are combined in a phase of cancelling the predetermined phase difference by the N-combiner.
Inventors
- 👤 Hironori Sakamoto
- 👤 Akira Ito
- 👤 Toshio Nojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:47
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/32; H03F1/3223; H03F1/3229; H03F3/00; H03F3/60; H03F3/602; H03F2201/00; H03F2201/32; H03F2201/3218
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A power amplifier device comprising: an input terminal for receiving a plurality of radio frequency signals of different frequencies collectively as a composite radio frequency signal; an output terminal; and an amplifying section coupled to said input terminal for amplifying said composite radio frequency signal and for supplying said amplified composite radio frequency signal to said output terminal; wherein said amplifying section comprises: an N-divider coupled to said input terminal for dividing said composite radio frequency signal into N composite radio frequency signals of a common phase and of a common amplitude, N being an integer which is not less than two; N feedforward distortion compensating circuits having a common gain and a common phase characteristic for amplifying said N composite radio frequency signals to produce N amplified signal components, respectively; and an N-combiner for combining said N amplified signal components and for supplying said N amplified signal components to said output terminal in an inphase condition.
Claim 2
Dependent Claim
157 words
A power amplifier device comprising: an input terminal for receiving a plurality of radio frequency signals of different frequencies collectively as a composite radio frequency signal; an output terminal; and an amplifying section coupled to said input terminal for amplifying said composite radio frequency signal and for supplying said amplified composite radio frequency signal to said output terminal; wherein said amplifying section comprises: an N-divider coupled to said input terminal for dividing said composite radio frequency signal into N composite radio frequency signals of a common phase and of a common amplitude, N being an integer which is not less than two; N feedforward distortion compensating circuits having a common gain and a common phase characteristic for amplifying said N composite radio frequency signals to produce N amplified signal components, respectively; and an N-combiner for combining said N amplified signal components and for supplying said N amplified signal components to said output terminal in an inphase condition.
Claim 3
Dependent Claim
42 words
The power amplifier device of claim 1, wherein said power amplifier device is part of a mobile radio communication system, said input terminal being coupled for receiving a plurality of carrier signals of different frequencies as said plurality of radio frequency signals.
Claim 4
Dependent Claim
166 words
A power amplifier device comprising: an input terminal for receiving a plurality of radio frequency signals of different frequencies collectively as a composite radio frequency signal; an output terminal; and an amplifying section coupled to said input terminal for amplifying said composite radio frequency signal and for supplying said amplified composite radio frequency signal to said output terminal; wherein said amplifying section comprises: an N-divider coupled to said input terminal for dividing said composite radio frequency signal into N composite radio frequency signals of a common amplitude and a predetermined phase difference between each pair, N being an integer which is not less than two; N feedforward distortion compensating circuits having a common gain and a common phase characteristic for amplifying said N composite radio frequency signals to produce N amplified signal components, respectively; and an N-combiner for combining said N amplified signal components and for supplying said N amplified signal components to said output terminal in such a phase for canceling said predetermined phase difference.
Claim 5
Dependent Claim
166 words
A power amplifier device comprising: an input terminal for receiving a plurality of radio frequency signals of different frequencies collectively as a composite radio frequency signal; an output terminal; and an amplifying section coupled to said input terminal for amplifying said composite radio frequency signal and for supplying said amplified composite radio frequency signal to said output terminal; wherein said amplifying section comprises: an N-divider coupled to said input terminal for dividing said composite radio frequency signal into N composite radio frequency signals of a common amplitude and a predetermined phase difference between each pair, N being an integer which is not less than two; N feedforward distortion compensating circuits having a common gain and a common phase characteristic for amplifying said N composite radio frequency signals to produce N amplified signal components, respectively; and an N-combiner for combining said N amplified signal components and for supplying said N amplified signal components to said output terminal in such a phase for canceling said predetermined phase difference.
Claim 6
Dependent Claim
42 words
The power amplifier device of claim 3, wherein said power amplifier device is part of a mobile radio communication system, said input terminal being coupled for receiving a plurality of carrier signals of different frequencies as said plurality of radio frequency signals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |