Patents by Inventor Charles Gore
Charles Gore has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7359684Abstract: A wireless communication device (UST), comprising an input for receiving baseband data (I, Q) in a first signal having a first frequency. The device also comprises circuitry (681, 682) for increasing the first frequency, to form a second signal having a second frequency, in response to a first frequency reference signal (IF2), and the device comprises circuitry (74) for increasing the second frequency, to form a third signal having a third frequency, in response to a second frequency reference signal (LO2). Lastly, the device comprises an antenna (ATU2) for transmitting the baseband data at a final transmission frequency selected as a band within a predetermined set of frequency bands. With reference to the preceding, the first frequency reference signal and the second frequency reference signal are variable and are selected in response to the final transmission frequency which is a particular band selected as a different band at different times and from the predetermined set of frequency bands.Type: GrantFiled: November 6, 2001Date of Patent: April 15, 2008Assignee: Texas Instruments IncorporatedInventors: Abdellatif Bellaouar, Jeff D. Laster, Charles Gore
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Patent number: 7110732Abstract: A subsampling receiver (50, 50?, 50?) for converting an RF signal to baseband is disclosed. The subsampling receiver (50, 50?, 50?) may be implemented into a wireless communications device (40), such as a wireless telephone handset. In one disclosed embodiment, the receiver (50) includes a sample and hold circuit (80) that samples a bandpass filtered input modulated signal at the subsampling frequency (fs) that is well below the RF carrier frequency but twice the bandwidth (BW) of the payload; the sampled signal is digitized, and applied to two digital mixers (85I, 85Q) to produce in-phase and quadrature components (I,Q) of the payload. In another embodiment, the receiver (50?) includes two sample and hold circuits (96I, 96Q) to sample the filtered signal at different phases of the sampling frequency, to produce the in-phase and quadrature digital components.Type: GrantFiled: March 19, 2002Date of Patent: September 19, 2006Assignee: Texas Instruments IncorporatedInventors: Mohamed A. I. Mostafa, Sherif Embabi, Moderage C. Fernando, Wing Kan Chan, Charles Gore, Jr.
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Patent number: 7095819Abstract: Multiple-mode direct phase/amplitude modulation circuitry (20) for use in a transceiver (17) of a device such as a wireless handset (10) is disclosed. The modulation circuitry (20) includes a modulation loop (36) for modulating a phase signal into a Gaussian-Minimum-Shift-Keyed (GMSK) signal for transmission in a first mode. The modulation loop (36) may include a phase-locked loop (45) with its frequency controlled by a ?-? demodulation of a compensated version of the phase signal, or alternatively may produce a modulated signal from a direct digital synthesis circuit (70; 70?). An amplitude signal is converted into an analog signal and applied to a single-sideband mixer (43) for combination with a frequency multiplied version of the phase-modulated signal (GMSK(t); PH(t)), producing an amplitude and phase modulated signal for transmission in a second mode.Type: GrantFiled: April 30, 2002Date of Patent: August 22, 2006Assignee: Texas Instruments IncorporatedInventors: Abdellatif Bellaouar, Charles Gore, Jeff D. Laster
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Patent number: 6975686Abstract: A digital signal processor generates in-phase, quadrature-phase and amplitude signals from a baseband signal. A modulator modulates the in-phase and quadrature-phase signals to produce a modulated signal. A phase locked loop is responsive to the modulated signal. The phase locked loop includes a controlled oscillator having a controlled oscillator input. An amplifier includes a signal input, amplitude control input and an output. The signal input is responsive to the controlled oscillator output and the amplitude control input is responsive to the amplitude signal. The in-phase and quadrature-phase signals may be normalized in-phase and quadrature-phase signals. Alternatively, a phase tracking subsystem may be provided that is responsive to the quadrature modulator to produce a phase signal that is responsive to phase changes in the modulated signal and that is independent of amplitude changes in the modulated signal.Type: GrantFiled: October 31, 2000Date of Patent: December 13, 2005Assignee: Telefonaktiebolaget L.M. EricssonInventors: M. Ali Khatibzadeh, Aristotle Hadjichristos, Scott R. Justice, Steven G. Cairns, Charles Gore, Jr., Jeffrey Schlang, Erik Bengtsson, William O. Camp, Jr., David R. Pehlke
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Publication number: 20030118143Abstract: Multiple-mode direct phase/amplitude modulation circuitry (20) for use in a transceiver (17) of a device such as a wireless handset (10) is disclosed. The modulation circuitry (20) includes a modulation loop (36) for modulating a phase signal into a Gaussian-Minimum-Shift-Keyed (GMSK) signal for transmission in a first mode. The modulation loop (36) may include a phase-locked loop (45) with its frequency controlled by a &Sgr;-&Dgr; demodulation of a compensated version of the phase signal, or alternatively may produce a modulated signal from a direct digital synthesis circuit (70; 70′). An amplitude signal is converted into an analog signal and applied to a single-sideband mixer (43) for combination with a frequency multiplied version of the phase-modulated signal (GMSK(t); PH(t)), producing an amplitude and phase modulated signal for transmission in a second mode.Type: ApplicationFiled: April 30, 2002Publication date: June 26, 2003Applicant: Texas Instruments IncorporatedInventors: Abdellatif Bellaouar, Charles Gore, Jeff D. Laster
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Publication number: 20030087613Abstract: A wireless communication device (UST), comprising an input for receiving baseband data (I, Q) in a first signal having a first frequency. The device also comprises circuitry (681, 682) for increasing the first frequency, to form a second signal having a second frequency, in response to a first frequency reference signal (IF2), and the device comprises circuitry (74) for increasing the second frequency, to form a third signal having a third frequency, in response to a second frequency reference signal (LO2). Lastly, the device comprises an antenna (ATU2) for transmitting the baseband data at a final transmission frequency selected as a band within a predetermined set of frequency bands. With reference to the preceding, the first frequency reference signal and the second frequency reference signal are variable and are selected in response to the final transmission frequency which is a particular band selected as a different band at different times and from the predetermined set of frequency bands.Type: ApplicationFiled: November 6, 2001Publication date: May 8, 2003Inventors: Abdellatif Bellaouar, Jeff D. Laster, Charles Gore
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Publication number: 20020181614Abstract: A subsampling receiver (50, 50′, 50″) for converting an RF signal to baseband is disclosed. The subsampling receiver (50, 50′, 50″) may be implemented into a wireless communications device (40), such as a wireless telephone handset. In one disclosed embodiment, the receiver (50) includes a sample and hold circuit (80) that samples a bandpass filtered input modulated signal at the subsampling frequency (fs) that is well below the RF carrier frequency but twice the bandwidth (BW) of the payload; the sampled signal is digitized, and applied to two digital mixers (85I, 85Q) to produce in-phase and quadrature components (I,Q) of the payload. In another embodiment, the receiver (50′) includes two sample and hold circuits (96I, 96Q) to sample the filtered signal at different phases of the sampling frequency, to produce the in-phase and quadrature digital components.Type: ApplicationFiled: March 19, 2002Publication date: December 5, 2002Applicant: Texas Instruments IncorporatedInventors: Mohamed A.I. Mostafa, Sherif Embabi, Moderage C. Fernando, Wing Kan Chan, Charles Gore
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Patent number: 6484038Abstract: A mobile radio telephone having a simplified architecture including a reduced number of integrated circuits and a reduced number of RF connections. A dual band, dual mode mobile phone can be constructed using either a single crystal reference oscillator or two crystals such that alternative symbol rates, channel spacings, or transmit/receive duplex spacings can be achieved.Type: GrantFiled: October 6, 2000Date of Patent: November 19, 2002Assignee: Ericsson Inc.Inventors: Charles Gore, Rodney A. Dolman, Paul W. Dent
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Patent number: 6308048Abstract: A mobile radio telephone having a simplified architecture including a reduced number of integrated circuits and a reduced number of RF connections. A dual band, dual mode mobile phone can be constructed using either a single crystal reference oscillator or two crystals such that alternative symbol rates, channel spacings, or transmit/receive duplex spacings can be achieved.Type: GrantFiled: November 19, 1997Date of Patent: October 23, 2001Assignee: Ericsson Inc.Inventors: Charles Gore, Rodney A. Dolman, Paul W. Dent
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Patent number: 6295442Abstract: An RF amplifier for a transmitter develops a phase modulation command representing a desired phase modulation of an RF signal, and an amplitude modulation command representing a desired amplitude modulation of the RF signal. An oscillator develops an RF input signal phase modulated based on the phase modulation command. A power amplifier receives the RF input signal and amplifies the RF input signal based on the amplitude modulation command to develop an RF output signal. A modulation control is operatively associated with the oscillator. The modulation control includes a phase memory for storing phase correction information correlating the amplitude modulation commands to a phase modulation error and a phase control for varying the phase modulation command based on the phase modulation error to correct for unintended phase errors created by amplitude modulation of the power amplifier.Type: GrantFiled: December 7, 1998Date of Patent: September 25, 2001Assignee: Ericsson Inc.Inventors: William O. Camp, Jr., Jeffrey A. Schlang, Charles Gore, Jacob Mannerstrale
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Patent number: 6194963Abstract: An RF amplifier includes a phase modulator developing a phase modulated RF input signal to be transmitted. A power amplifier receives the RF input signal and amplifies the RF input signal to develop an RF output signal. An amplifier control is operatively associated with the phase modulator and the power amplifier. The amplifier control includes a memory for storing correction information correlating desired amplitude of the RF output signal relative to actual amplifier amplitude, and a control varies power amplifier supply voltage responsive to the correction information to linearize amplitude modulation in the power amplifier.Type: GrantFiled: November 18, 1998Date of Patent: February 27, 2001Assignee: Ericsson Inc.Inventors: William O. Camp, Jr., Jeffrey A. Schlang, Charles Gore, Ronald D. Boesch, Domenico Arpaia
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Patent number: 6191653Abstract: An RF amplifier includes an oscillator developing an RF input signal to be transmitted. A power amplifier receives the RF input signal and amplifies the RF input signal to develop an RF output signal. An amplifier control is operatively associated with the oscillator and the power amplifier. The amplifier control includes means for developing a control signal representing a desired amplitude of the RF output signal. A memory stores correction information correlating actual amplitude of the RF output signal relative to the control signal, and a control varies the power amplifier circuit supply voltage using the control signal modified responsive to the correction information for the desired amplitude.Type: GrantFiled: November 18, 1998Date of Patent: February 20, 2001Assignee: Ericsson Inc.Inventors: William O. Camp, Jr., Jeffrey Schlang, Charles Gore, Ronald D. Boesch, Domenico Arpaia
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Patent number: 6192225Abstract: A homodyne receiver according to the present invention includes a signal input and first and second mixers coupled to the signal input. A local oscillator provides a reference signal at the frequency of modulation of the input signal. The reference signal output by the local oscillator is passed through a switchable phase change element, the output of which is coupled directly to the first mixer and indirectly to the second mixer through a second phase change element. The switchable phase change element changes the phase of an input signal by a predetermined phase based on the state of a control input, such that the output of the phase change element in one state is &pgr; radians out of phase with the output of the phase change element in the other state. The second phase change element changes the phase of an input signal by &pgr;/2 radians. The outputs of the mixers are coupled to a pair of switchable inverters and low pass filters.Type: GrantFiled: April 22, 1998Date of Patent: February 20, 2001Assignee: Ericsson Inc.Inventors: Domenico Arpaia, Charles Gore, Jr.
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Patent number: 5890051Abstract: According to a second embodiment of the invention, a mobile phone receiver comprises a first down converter using a first local oscillator frequency which can be tuned in frequency steps by a programmable digital frequency synthesizer PLL which is locked to a reference frequency. The first down converter converts received signals to a first IF for filtering. A second down converter using a second local oscillator converts first IF signals to a second IF. The second local oscillator frequency is generated using a second digital frequency synthesizer PLL which locks the second oscillator to the reference frequency. A third down converter mixes the transmit frequency with the first local oscillator frequency to produce a lock frequency. A third digital frequency synthesizer PLL compares the lock frequency and the reference frequency to control generation of the transmit frequency.Type: GrantFiled: March 17, 1998Date of Patent: March 30, 1999Assignee: Ericsson Inc.Inventors: Jeffrey Schlang, Ron Boesch, Charles Gore, Aristotle Hadjichristos