Patents by Inventor Eric Duvivier
Eric Duvivier 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: 11942974Abstract: A method for calibrating a radio transceiver begins by injecting a low-frequency tone at a transmit power amplifier input of the radio transceiver, where the low frequency tone is at least an order of magnitude lower than the operating frequency of a local oscillator coupled to the transmitter input. The method continues by upconverting the low-frequency tone to produce a plurality of tones at a transmit power amplifier output and then determining which tone of the plurality of tones is a local oscillator feedthrough tone associated with a transmit power amplifier output and which tone of the plurality of tones is representative of an in-phase and quadrature (I/Q) imbalance associated with the transmit power amplifier output.Type: GrantFiled: July 21, 2022Date of Patent: March 26, 2024Assignee: Pharrowtech BVInventors: Khaled Khalaf, Ahmet Tekin, Biagio Bisanti, Qixian Shi, Eric Duvivier
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Publication number: 20230336197Abstract: A method for calibrating a radio transceiver begins by injecting a low-frequency tone at a transmit power amplifier input of the radio transceiver, where the low frequency tone is at least an order of magnitude lower than the operating frequency of a local oscillator coupled to the transmitter input. The method continues by upconverting the low-frequency tone to produce a plurality of tones at a transmit power amplifier output and then determining which tone of the plurality of tones is a local oscillator feedthrough tone associated with a transmit power amplifier output and which tone of the plurality of tones is representative of an in-phase and quadrature (I/Q) imbalance associated with the transmit power amplifier output.Type: ApplicationFiled: July 21, 2022Publication date: October 19, 2023Applicant: PHARROWTECH BVInventors: Khaled Khalaf, Ahmet Tekin, Biagio Bisanti, Qixian Shi, Eric Duvivier
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Patent number: 10374549Abstract: Variable frequency oscillators allowing wide tuning range and low phase noise is disclosed. In an illustrative embodiment, a first transistor has a first terminal (e.g. collector) connected to a reference voltage, and a second terminal (e.g. emitter) connected to a first terminal of a first current source and to ground. The first transistor further has a third terminal connected to a first inductor and to a first capacitor connected to the emitter of the first transistor and also to a second capacitor connected to ground. A second transistor is similarly constructed. In order to achieve a variable frequency oscillation between the emitters of the two transistors, a variable tank capacitor is connected between the inductors, forming a circuit connecting in series all passive components composing the LC tank, masking most of parasitic capacitances.Type: GrantFiled: January 5, 2017Date of Patent: August 6, 2019Assignee: SDRF EURLInventors: Biagio Bisanti, Eric Duvivier, Lorenzo Carpineto, Stefano Cipriani, Francesco Coppola, Gianni Puccio, Rémi Artinian, Francois Marot, Vanessa Bedero, Lysiane Koechlin
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Patent number: 10200049Abstract: A multiloop PLL circuit comprising: a first PLL loop comprising a first VCO, a first phase detector having a first input receiving a reference frequency (Fref) and a second input receiving the output of a first programmable divider, which input receives the signal generated by the first VCO and a first loop filter connected between said first phase detector and said first VCO; at least one auxiliary PLL loop comprising a second VCO, a second phase detector, a second (R1) and a third (N1) programmable dividers, and a second loop filter a main loop for generating a desired output frequency Fout comprising a third VCO, a third phase detector, a fourth (Rn) and a fifth (Nn) programmable divider, a main loop filter and a mixer additional possible auxiliary PLL loop each comprising a forth VCO, a forth phase detector, a sixth (Ri) and a seventh (Ni) programmable divider, a third auxiliary loop filter and a mixer whereby the desired output frequency Fout is generated in accordance with the relation: Fout=(N1/R1+Type: GrantFiled: January 5, 2017Date of Patent: February 5, 2019Assignee: SDRF EURlInventors: Biagio Bisanti, Eric Duvivier, Lorenzo Carpineto, Stefano Cipriani, Francesco Coppola, Gianni Puccio, Rémi Artinian, Francois Marot, Vanessa Bedero, Lysiane Koechlin
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Publication number: 20170201213Abstract: A variable frequency oscillator comprising a first transistor (10) and a second transistor (20); wherein the first transistor (10) has a first terminal—collector—which is connected to a reference voltage, and a second terminal—emitter—which is connected to a first terminal of a first current source (13), which second terminal is connected to ground, and a third terminal—base—connected to a first terminal of a first inductor (14) and to a top terminal of a first capacitor (11), wherein the first capacitor (11) has a bottom terminal which is connected to the second terminal—emitter—of the first transistor (10) but also to a top terminal of a second capacitor (12) having a bottom terminal being connected to ground; wherein the second transistor (20) has a first terminal—collector—which is connected to a reference voltage, and a second terminal—emitter—which is connected to a first terminal of a second current source (23), which second terminal is connected to ground, and a third terminal—base—connected to a fType: ApplicationFiled: January 5, 2017Publication date: July 13, 2017Inventors: BIAGIO BISANTI, ERIC DUVIVIER, LORENZO CARPINETO, STEFANO CIPRIANI, FRANCESCO COPPOLA, GIANNI PUCCIO, RÉMI ARTINIAN, FRANCOIS MAROT, VANESSA BEDERO, LYSIANE KOECHLIN
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Publication number: 20170201262Abstract: A multiloop PLL circuit comprising: a first PLL loop comprising a first VCO, a first phase detector having a first input receiving a reference frequency (Fref) and a second input receiving the output of a first programmable divider, which input receives the signal generated by the first VCO and a first loop filter connected between said first phase detector and said first VCO; at least one auxiliary PLL loop comprising a second VCO, a second phase detector, a second (R1) and a third (N1) programmable dividers, and a second loop filter a main loop for generating a desired output frequency Fout comprising a third VCO, a third phase detector, a fourth (Rn) and a fifth (Nn) programmable divider, a main loop filter and a mixer additional possible auxiliary PLL loop each comprising a forth VCO, a forth phase detector, a sixth (Ri) and a seventh (Ni) programmable divider, a third auxiliary loop filter and a mixer whereby the desired output frequency Fout is generated in accordance with the relation: Fout=(NType: ApplicationFiled: January 5, 2017Publication date: July 13, 2017Inventors: BIAGIO BISANTI, ERIC DUVIVIER, LORENZO CARPINETO, STEFANO CIPRIANI, FRANCESCO COPPOLA, GIANNI PUCCIO, REMI ARTINIAN, FRANCOIS MAROT, VANESSA BEDERO, LYSIANE KOECHLIN
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Patent number: 7653370Abstract: A tunable multiple frequency source system employing offset signal phasing includes a first frequency source, a phase delay element, and a second frequency source configured to operate concurrently with the first frequency source. The first frequency source includes an input coupled to receive a reference input signal and an output for providing a first frequency source signal. The phase delay includes an input coupled to receive the input reference signal, and an output, the phase delay element operable to apply a predefined phase delay to the input reference signal to produce a phase-delayed input signal. The second frequency source includes an input coupled to receive the phase-delayed input signal and an output for providing a second frequency source signal.Type: GrantFiled: August 1, 2006Date of Patent: January 26, 2010Assignee: RF Magic, Inc.Inventors: Biagio Bisanti, Stefano Cipriani, Lorenzo Carpineto, Gianni Puccio, Eric Duvivier, Francesco Coppola, Martin Alderton
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Patent number: 7528665Abstract: A multiple frequency source system includes at least one frequency source tunable to a predefined target frequency, and at least one additional frequency source operable to generate a second signal at a frequency which is either higher or lower than the target frequency. A method for tuning the tunable frequency source to the target frequency during concurrent generation of the second signal includes (i) controlling the tunable frequency source to tune to at least one frequency point frequency lower than the target frequency, and thereafter controlling the oscillator to tune to the target frequency, when the second signal is higher in frequency than the target frequency, or (ii) controlling the tunable frequency source to tune to at least one frequency point higher than the target frequency, and thereafter controlling the tunable frequency source to tune to the target frequency, when the second signal is lower in frequency than the target frequency.Type: GrantFiled: August 1, 2006Date of Patent: May 5, 2009Assignee: RF Magic, Inc.Inventors: Francesco Coppola, Stefano Cipriani, Lorenzo Carpineto, Gianni Puccio, Eric Duvivier, Biagio Bisanti, Martin Alderton
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Patent number: 7355483Abstract: A method for mitigating phase pulling in multiple frequency source system includes generating a first signal, the first signal referred to as an existing signal operating at an existing frequency point, the existing signal having a predefined pulling bandwidth around the existing frequency point. A request is received to generate a prospective signal at a prospective frequency point which is within the predefined pulling bandwidth of the existing signal. The prospective frequency is removed from within the predefined pulling bandwidth, and the prospective and existing signals are generated at the corresponding frequency points.Type: GrantFiled: August 1, 2006Date of Patent: April 8, 2008Assignee: RF Magic, Inc.Inventors: Biagio Bisanti, Stefano Cipriani, Lorenzo Carpineto, Gianni Puccio, Eric Duvivier, Francesco Coppola, Martin Alderton
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Publication number: 20070200640Abstract: A method for mitigating phase pulling in multiple frequency source system includes generating a first signal, the first signal referred to as an existing signal operating at an existing frequency point, the existing signal having a predefined pulling bandwidth around the existing frequency point. A request is received to generate a prospective signal at a prospective frequency point which is within the predefined pulling bandwidth of the existing signal. The prospective frequency is removed from within the predefined pulling bandwidth, and the prospective and existing signals are generated at the corresponding frequency points.Type: ApplicationFiled: August 1, 2006Publication date: August 30, 2007Applicant: RF Magic, Inc.Inventors: Biagio Bisanti, Stefano Cipriani, Lorenzo Carpineto, Gianni Puccio, Eric Duvivier, Francesco Coppola, Martin Alderton
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Publication number: 20070183014Abstract: A multiple frequency source system includes at least one frequency source tunable to a predefined target frequency, and at least one additional frequency source operable to generate a second signal at a frequency which is either higher or lower than the target frequency. A method for tuning the tunable frequency source to the target frequency during concurrent generation of the second signal includes (i) controlling the tunable frequency source to tune to at least one frequency point frequency lower than the target frequency, and thereafter controlling the oscillator to tune to the target frequency, when the second signal is higher in frequency than the target frequency, or (ii) controlling the tunable frequency source to tune to at least one frequency point higher than the target frequency, and thereafter controlling the tunable frequency source to tune to the target frequency, when the second signal is lower in frequency than the target frequency.Type: ApplicationFiled: August 1, 2006Publication date: August 9, 2007Applicant: RF Magic, Inc.Inventors: Francesco Coppola, Stefano Cipriani, Lorenzo Carpineto, Gianni Puccio, Eric Duvivier, Biagio Bisanti, Martin Alderton
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Publication number: 20070176663Abstract: A tunable multiple frequency source system employing offset signal phasing includes a first frequency source, a phase delay element, and a second frequency source configured to operate concurrently with the first frequency source. The first frequency source includes an input coupled to receive a reference input signal and an output for providing a first frequency source signal. The phase delay includes an input coupled to receive the input reference signal, and an output, the phase delay element operable to apply a predefined phase delay to the input reference signal to produce a phase-delayed input signal. The second frequency source includes an input coupled to receive the phase-delayed input signal and an output for providing a second frequency source signal.Type: ApplicationFiled: August 1, 2006Publication date: August 2, 2007Applicant: RF Magic, Inc.Inventors: Biagio Bisanti, Stefano Cipriani, Lorenzo Carpineto, Gianni Puccio, Eric Duvivier, Francesco Coppola, Martin Alderton
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Patent number: 7136626Abstract: A transmitter architecture (200) provides for a stable and low noise modulator where the modulation bandwidth is uncorrelated to the TX loop bandwidth. The output signal (228) of the TX loop is demodulated by a demodulator (208) and the demodulated signal is compared by a comparator (206) with the modulating input signal (202). The output of the comparator is then used to adjust a digital pre-emphasis filter (204) which preconditions the modulating input signal (202) in the digital domain. The preconditioning approach of the present invention provides for low noise because the transmitter designer can chose a narrow band for the TX loop which will also filter out the noise coming from the additional synthesizer (226) used to down convert the input signal.Type: GrantFiled: February 8, 2002Date of Patent: November 14, 2006Assignee: Texas Instruments IncorporatedInventors: Biagio Bisanti, Stefano Cipriani, Eric Duvivier
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Patent number: 7081791Abstract: A low noise amplifier circuit (10) includes an attenuator (12) for receiving a calibration signal and generating an attenuated calibration signal. A low noise amplifier (14) amplifies the attenuated calibration signal in calibration mode or amplifies a functional signal in functional mode. In calibration mode, a envelope detector/comparator (16) compares the calibration signal with the output of the low noise amplifier and generates a compensation signal indicating a deviation between the two signals. The gain of the low noise amplifier is adjusted responsive to the compensation signal.Type: GrantFiled: April 7, 2004Date of Patent: July 25, 2006Assignee: Texas Instruments IncorporatedInventors: Lorenzo M. Carpineto, Eric Duvivier, Stefano Cipriani
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Publication number: 20050073357Abstract: A low noise amplifier circuit (10) includes an attenuator (12) for receiving a calibration signal and generating an attenuated calibration signal. A low noise amplifier (14) amplifies the attenuated calibration signal in calibration mode or amplifies a functional signal in functional mode. In calibration mode, a envelope detector/comparator (16) compares the calibration signal with the output of the low noise amplifier and generates a compensation signal indicating a deviation between the two signals. The gain of the low noise amplifier is adjusted responsive to the compensation signal.Type: ApplicationFiled: April 7, 2004Publication date: April 7, 2005Inventors: Lorenzo Carpineto, Eric Duvivier, Stefano Cipriani
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Publication number: 20030153286Abstract: A transmitter architecture (200) provides for a stable and low noise modulator where the modulation bandwidth is uncorrelated to the TX loop bandwidth. The output signal (228) of the TX loop is demodulated by a demodulator (208) and the demodulated signal is compared by a comparator (206) with the modulating input signal (202). The output of the comparator is then used to adjust a digital pre-emphasis filter (204) which preconditions the modulating input signal (202) in the digital domain. The preconditioning approach of the present invention provides for low noise because the transmitter designer can chose a narrow band for the TX loop which will also filter out the noise coming from the additional synthesizer (226) used to down convert the input signal.Type: ApplicationFiled: February 8, 2002Publication date: August 14, 2003Inventors: Biagio Bisanti, Stefano Cipriani, Eric Duvivier
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Patent number: 5625318Abstract: A tunable quadrature phase shifter including two branches each constituted by the cascade connection of a filter, an amplifier and a summing circuit, and two cross-connections constituted by amplifiers interconnecting the filter of one branch to the summing circuit of the opposite branch. An accurate 90 degrees phase shift between the two output signals is obtained by controlling the tail currents of the four amplifiers. The phase shifter used in mobile telecommunication transceivers may be easily and accurately tuned because the signals used in the summing circuits all have a similar amplitude. It is further adapted to operate with only a 3 Volt battery supply as used in wireless phones. The bandwidth of the amplifiers is increased by using double differential pair amplifiers which behave as cascode arrangements.Type: GrantFiled: October 10, 1995Date of Patent: April 29, 1997Assignee: Alcatel NVInventors: Joannes M. J. Sevenhans, Eric Duvivier, Daniel Sallaerts