US5898906A
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US
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System and method for implementing a cellular radio transmitter device
Assignee: GEC Plessey Semiconductors Inc
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Filing: 1996-10-29
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Granted: 1999-04-27
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Expires: 2016-10-29
Abstract
Abstract A system and method for implementing a cellular radio transmitter device comprises a first oscillator device for generating a first oscillator output signal, a second oscillator device for generating a second oscillator output signal, a power amplifier for amplifying the second oscillator output signal to obtain a transmit signal, a mixer device for combining the first oscillator output signal and the transmit signal to produce a mixer output signal, a phase comparator for comparing the mixer output signal and a transmitter input signal and responsively generating a control signal to control the transmit oscillator, and a feedback path for adding the mixer output signal to the transmitter input signal to compensate for distortion present in the transmit signal.
Inventors
- 👤 Anthony David Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:40
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/403; H04B1/405; H03; H03C; H03C3/00; H03C3/02; H03C3/09; H03C3/0908; H03C3/38; H03C3/40; H03D; H03D7/00; H03D7/16; H03D7/161; H03D7/163
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
125 words
A system for implementing a transmitter device, comprising: a first oscillator device for generating a first oscillator output signal; a second oscillator device for generating a second oscillator output signal; a power amplifier for amplifying said second oscillator output signal to obtain a transmit signal; a mixer device for combining said first oscillator output signal and said transmit signal to produce a mixer output signal; a phase comparator for comparing said mixer output signal and a transmitter input signal and responsively generating a control signal to control said second oscillator device; and a feedback path for manipulating said mixer output signal to generate a feedback signal, and for adding said feedback signal to said transmitter input signal to compensate for distortion in said transmit signal.
Claim 2
Independent Claim
125 words
A system for implementing a transmitter device, comprising: a first oscillator device for generating a first oscillator output signal; a second oscillator device for generating a second oscillator output signal; a power amplifier for amplifying said second oscillator output signal to obtain a transmit signal; a mixer device for combining said first oscillator output signal and said transmit signal to produce a mixer output signal; a phase comparator for comparing said mixer output signal and a transmitter input signal and responsively generating a control signal to control said second oscillator device; and a feedback path for manipulating said mixer output signal to generate a feedback signal, and for adding said feedback signal to said transmitter input signal to compensate for distortion in said transmit signal.
Claim 3
Dependent Claim
23 words
The system of claim 1 further comprising an attenuator device for attenuating said transmit signal before said transmit signal reaches said mixer device.
Claim 4
Dependent Claim
25 words
The system of claim 1 further comprising a modulator device which modulates said transmitter input signal before said transmitter input signal reaches said phase comparator.
Claim 5
Dependent Claim
24 words
The system of claim 3 further comprising a modulator up-converter oscillator, said modulator up-converter oscillator having the same frequency as said mixer output signal.
Claim 6
Dependent Claim
32 words
The system of claim 1 wherein said feedback path comprises a demodulator device which receives and demodulates said mixer output signal before adding said mixer output signal to said transmitter input signal.
Claim 7
Independent Claim
126 words
A method for implementing a transmitter device, comprising the steps of: generating a first oscillator output signal from a first oscillator device; generating a second oscillator output signal from a second oscillator device; amplifying said second oscillator output signal with a power amplifier to obtain a transmit signal; combining said first oscillator output signal and said transmit signal in a mixer device to produce a mixer output signal; comparing said mixer output signal and a transmitter input signal with a phase comparator to responsively generate a control signal for controlling said second oscillator device; manipulating said mixer output signal to generate a feedback signal; and adding said feedback signal to said transmitter input signal via a feedback path to compensate for distortion in said transmit signal.
Claim 8
Independent Claim
126 words
A method for implementing a transmitter device, comprising the steps of: generating a first oscillator output signal from a first oscillator device; generating a second oscillator output signal from a second oscillator device; amplifying said second oscillator output signal with a power amplifier to obtain a transmit signal; combining said first oscillator output signal and said transmit signal in a mixer device to produce a mixer output signal; comparing said mixer output signal and a transmitter input signal with a phase comparator to responsively generate a control signal for controlling said second oscillator device; manipulating said mixer output signal to generate a feedback signal; and adding said feedback signal to said transmitter input signal via a feedback path to compensate for distortion in said transmit signal.
Claim 9
Dependent Claim
22 words
The method of claim 6 further comprising the step of attenuating said transmit signal before said transmit signal reaches said mixer device.
Claim 10
Dependent Claim
24 words
The method of claim 6 further comprising the step of modulating said transmitter input signal before said transmitter input signal reaches said phase comparator.
Claim 11
Dependent Claim
28 words
The method of claim 8 wherein said step of modulating uses a modulator up-converter oscillator, said modulator up-converter oscillator having the same frequency as said mixer output signal.
Claim 12
Dependent Claim
32 words
The method of claim 6 wherein said feedback path comprises a demodulator device which receives and demodulates said mixer output signal before adding said mixer output signal to said transmitter input signal.
Claim 13
Dependent Claim
129 words
A computer-readable medium containing instructions for causing a transmitter to perform the steps of: generating a first oscillator output signal from a first oscillator device; generating a second oscillator output signal from a second oscillator device; amplifying said second oscillator output signal with a power amplifier to obtain a transmit signal; combining said first oscillator output signal and said transmit signal in a mixer device to produce a mixer output signal; comparing said mixer output signal and a transmitter input signal with a phase comparator to responsively generate a control signal for controlling said second oscillator device; manipulating said mixer output signal to generate a feedback signal; and adding said feedback signal to said transmitter input signal via a feedback path to compensate for distortion in said transmit signal.
Claim 14
Dependent Claim
129 words
A computer-readable medium containing instructions for causing a transmitter to perform the steps of: generating a first oscillator output signal from a first oscillator device; generating a second oscillator output signal from a second oscillator device; amplifying said second oscillator output signal with a power amplifier to obtain a transmit signal; combining said first oscillator output signal and said transmit signal in a mixer device to produce a mixer output signal; comparing said mixer output signal and a transmitter input signal with a phase comparator to responsively generate a control signal for controlling said second oscillator device; manipulating said mixer output signal to generate a feedback signal; and adding said feedback signal to said transmitter input signal via a feedback path to compensate for distortion in said transmit signal.
Claim 15
Dependent Claim
23 words
The computer-readable medium of claim 11 further comprising the step of attenuating said transmit signal before said transmit signal reaches said mixer device.
Claim 16
Dependent Claim
25 words
The computer-readable medium of claim 11 further comprising the step of modulating said transmitter input signal before said transmitter input signal reaches said phase comparator.
Claim 17
Dependent Claim
29 words
The computer-readable medium of claim 13 wherein said step of modulating uses a modulator up-converter oscillator, said modulator up-converter oscillator having the same frequency as said mixer output signal.
Claim 18
Dependent Claim
33 words
The computer-readable medium of claim 11 wherein said feedback path comprises a demodulator device which receives and demodulates said mixer output signal before adding said mixer output signal to said transmitter input signal.
Claim 19
Independent Claim
126 words
A system for implementing a transmitter device, comprising: means for generating a first oscillator output signal from a first oscillator device; means for generating a second oscillator output signal from a second oscillator device; means for amplifying said second oscillator output signal with a power amplifier to obtain a transmit signal; means for combining said first oscillator output signal and said transmit signal in a mixer device to produce a mixer output signal; means for comparing said mixer output signal and a transmitter input signal with a phase comparator to responsively generate a control signal for controlling said second oscillator device; and means for providing said mixer output signal to said transmitter input signal via a feedback path to compensate for distortion in said transmit signal.
Claim 20
Independent Claim
126 words
A system for implementing a transmitter device, comprising: means for generating a first oscillator output signal from a first oscillator device; means for generating a second oscillator output signal from a second oscillator device; means for amplifying said second oscillator output signal with a power amplifier to obtain a transmit signal; means for combining said first oscillator output signal and said transmit signal in a mixer device to produce a mixer output signal; means for comparing said mixer output signal and a transmitter input signal with a phase comparator to responsively generate a control signal for controlling said second oscillator device; and means for providing said mixer output signal to said transmitter input signal via a feedback path to compensate for distortion in said transmit signal.
Claim 21
Dependent Claim
21 words
The system of claim 16 further comprising means for attenuating said transmit signal before said transmit signal reaches said mixer device.
Claim 22
Dependent Claim
23 words
The system of claim 16 further comprising means for modulating said transmitter input signal before said transmitter input signal reaches said phase comparator.
Claim 23
Dependent Claim
28 words
The system of claim 18 wherein said means for modulating uses a modulator up-converter oscillator, said modulator up-converter oscillator having the same frequency as said mixer output signal.
Claim 24
Dependent Claim
32 words
The system of claim 16 wherein said feedback path comprises a demodulator device which receives and demodulates said mixer output signal before adding said mixer output signal to said transmitter input signal.
Claim 25
Independent Claim
125 words
A system for implementing a transmitter device, comprising: a first oscillator device for generating a first oscillator output signal; a second oscillator device for generating a second oscillator output signal; a power amplifier for amplifying said second oscillator output signal to obtain a transmit signal; and a feedback path including, an attenuator for attenuating said transmit signal to generate an attenuated transmit signal, a mixer device for combining said first oscillator output signal and said attenuated transmit signal to produce a mixer output signal a demodulator for manipulating said mixer output signal to generate a feedback signal, and a summing amplifier for receiving said feedback signal and for summing said feedback signal with a transmitter input signal to compensate for distortion in said transmit signal.
Claim 26
Independent Claim
125 words
A system for implementing a transmitter device, comprising: a first oscillator device for generating a first oscillator output signal; a second oscillator device for generating a second oscillator output signal; a power amplifier for amplifying said second oscillator output signal to obtain a transmit signal; and a feedback path including, an attenuator for attenuating said transmit signal to generate an attenuated transmit signal, a mixer device for combining said first oscillator output signal and said attenuated transmit signal to produce a mixer output signal a demodulator for manipulating said mixer output signal to generate a feedback signal, and a summing amplifier for receiving said feedback signal and for summing said feedback signal with a transmitter input signal to compensate for distortion in said transmit signal.
Claim 27
Dependent Claim
33 words
The system of claim 21 further comprising a phase comparator for comparing said mixer output signal and said transmitter input signal and responsively generating a control signal to control said second oscillator device.
References Cited (Backward Citations)
US4489413A
Cited
US4654885A
Cited
US4783843A
Cited
US4736390A
Cited
US4910800A
Cited
US5020093A
Cited
US5020092A
Cited
US5170492A
Cited
US5230095A
Cited
US5251053A
Cited
US5170500A
Cited
US5175872A
Cited
US5303404A
Cited
US5230088A
Cited
WO1994005078A1
Cited
US5469105A
Cited
US5657344A
Cited
US5732330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-04-26 | 2002-10-26 | 2003-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-26 | 2006-10-26 | 2007-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-26 | 2010-10-26 | 2011-04-27 | $7700.00 | Window Closed / Lapsed |