Patents by Inventor Mihai A. Sanduleanu
Mihai A. Sanduleanu 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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Publication number: 20170272125Abstract: RFID (radio frequency identification) systems are provided in which tag and interrogator devices implement a hybrid framework for signaling including an optical transmitter/receiver system and an RF transmitter/receiver system. For instance, an RFID tag device includes: optical receiver circuitry configured to receive an optical signal having an embedded clock signal from an interrogator device, and convert the optical signal into an electrical signal comprising the embedded clock signal; clock extraction circuitry configured to extract the embedded clock signal from the electrical signal, and output the extracted clock signal as a clock signal for controlling clocking functions of the tag device; voltage regulator circuitry configured to generate a regulated supply voltage from the electrical signal, wherein the regulated supply voltage is utilized as a bias voltage for components of the tag device; and data transmitter circuitry configured to wirelessly transmit tag data to the interrogator device.Type: ApplicationFiled: June 7, 2017Publication date: September 21, 2017Inventors: Daniel J. Friedman, Duixian Liu, Mihai A. Sanduleanu
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Patent number: 9755701Abstract: RFID (radio frequency identification) systems are provided in which tag and interrogator devices implement a hybrid framework for signaling including an optical transmitter/receiver system and an RF transmitter/receiver system. For instance, an RFID tag device includes: optical receiver circuitry configured to receive an optical signal having an embedded clock signal from an interrogator device, and convert the optical signal into an electrical signal comprising the embedded clock signal; clock extraction circuitry configured to extract the embedded clock signal from the electrical signal, and output the extracted clock signal as a clock signal for controlling clocking functions of the tag device; voltage regulator circuitry configured to generate a regulated supply voltage from the electrical signal, wherein the regulated supply voltage is utilized as a bias voltage for components of the tag device; and data transmitter circuitry configured to wirelessly transmit tag data to the interrogator device.Type: GrantFiled: March 31, 2015Date of Patent: September 5, 2017Assignee: International Business Machines CorporationInventors: Daniel J. Friedman, Duixian Liu, Mihai A. Sanduleanu
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Patent number: 9734371Abstract: RFID (radio frequency identification) systems are provided in which tag and interrogator devices implement a hybrid framework for signaling including an optical transmitter/receiver system and an RF transmitter/receiver system. For instance, an RFID tag device includes: optical receiver circuitry configured to receive an optical signal having an embedded clock signal from an interrogator device, and convert the optical signal into an electrical signal comprising the embedded clock signal; clock extraction circuitry configured to extract the embedded clock signal from the electrical signal, and output the extracted clock signal as a clock signal for controlling clocking functions of the tag device; voltage regulator circuitry configured to generate a regulated supply voltage from the electrical signal, wherein the regulated supply voltage is utilized as a bias voltage for components of the tag device; and data transmitter circuitry configured to wirelessly transmit tag data to the interrogator device.Type: GrantFiled: June 25, 2015Date of Patent: August 15, 2017Assignee: International Business Machines CorporationInventors: Daniel J. Friedman, Duixian Liu, Mihai A. Sanduleanu
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Publication number: 20170228568Abstract: RFID (radio frequency identification) systems are provided in which tag and interrogator devices implement a hybrid framework for signaling including an optical transmitter/receiver system and an RF transmitter/receiver system. For instance, an RFID tag device includes: optical receiver circuitry configured to receive an optical signal having an embedded clock signal from an interrogator device, and convert the optical signal into an electrical signal comprising the embedded clock signal; clock extraction circuitry configured to extract the embedded clock signal from the electrical signal, and output the extracted clock signal as a clock signal for controlling clocking functions of the tag device; voltage regulator circuitry configured to generate a regulated supply voltage from the electrical signal, wherein the regulated supply voltage is utilized as a bias voltage for components of the tag device; and data transmitter circuitry configured to wirelessly transmit tag data to the interrogator device.Type: ApplicationFiled: April 26, 2017Publication date: August 10, 2017Inventors: Daniel J. Friedman, Duixian Liu, Mihai A. Sanduleanu
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Patent number: 9660660Abstract: An analog-to-digital converter includes a plurality of slave sampler multiplexers responsive to outputs of a master sampler that receives analog signals and whose output ports connect to integrating threshold comparators having capacitive digital-to-analog conversion offset adjustments for forming an analog-to-thermometer code conversion. A calibration state machine receives outputs of each of the integrating threshold comparators to control the capacitive digital-to-analog conversion offset adjustment of every integrating threshold comparator and to control a calibration digital-to analog converter. A thermometer code to binary code logic decoder receives outputs of each of the integrating threshold comparators and outputs digital samples.Type: GrantFiled: September 22, 2016Date of Patent: May 23, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Troy Beukema, Yong Liu, Sergey Rylov, Mihai A. Sanduleanu, Zeynep Toprak Deniz
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Publication number: 20170141785Abstract: An analog-to-digital converter includes a plurality of slave sampler multiplexers responsive to outputs of a master sampler that receives analog signals and whose output ports connect to integrating threshold comparators having capacitive digital-to-analog conversion offset adjustments for forming an analog-to-thermometer code conversion. A calibration state machine receives outputs of each of the integrating threshold comparators to control the capacitive digital-to-analog conversion offset adjustment of every integrating threshold comparator and to control a calibration digital-to analog converter. A thermometer code to binary code logic decoder receives outputs of each of the integrating threshold comparators and outputs digital samples.Type: ApplicationFiled: September 22, 2016Publication date: May 18, 2017Inventors: TROY BEUKEMA, Yong Liu, Sergey Rylov, Mihai A. Sanduleanu, Zeynep Toprak Deniz
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Patent number: 9571115Abstract: An analog-to-digital converter includes a plurality of slave sampler multiplexers responsive to outputs of a master sampler that receives analog signals and whose output ports connect to integrating threshold comparators having capacitive digital-to-analog conversion offset adjustments for forming an analog-to-thermometer code conversion. A calibration state machine receives outputs of each of the integrating threshold comparators to control the capacitive digital-to-analog conversion offset adjustment of every integrating threshold comparator and to control a calibration digital-to analog converter. A thermometer code to binary code logic decoder receives outputs of each of the integrating threshold comparators and outputs digital samples.Type: GrantFiled: November 13, 2015Date of Patent: February 14, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Troy Beukema, Yong Liu, Sergey Rylov, Mihai A. Sanduleanu, Zeynep Toprak Deniz
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Publication number: 20160292470Abstract: RFID (radio frequency identification) systems are provided in which tag and interrogator devices implement a hybrid framework for signaling including an optical transmitter/receiver system and an RF transmitter/receiver system. For instance, an RFID tag device includes: optical receiver circuitry configured to receive an optical signal having an embedded clock signal from an interrogator device, and convert the optical signal into an electrical signal comprising the embedded clock signal; clock extraction circuitry configured to extract the embedded clock signal from the electrical signal, and output the extracted clock signal as a clock signal for controlling clocking functions of the tag device; voltage regulator circuitry configured to generate a regulated supply voltage from the electrical signal, wherein the regulated supply voltage is utilized as a bias voltage for components of the tag device; and data transmitter circuitry configured to wirelessly transmit tag data to the interrogator device.Type: ApplicationFiled: June 25, 2015Publication date: October 6, 2016Inventors: Daniel J. Friedman, Duixian Liu, Mihai A. Sanduleanu
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Publication number: 20160294481Abstract: RFID (radio frequency identification) systems are provided in which tag and interrogator devices implement a hybrid framework for signaling including an optical transmitter/receiver system and an RF transmitter/receiver system. For instance, an RFID tag device includes: optical receiver circuitry configured to receive an optical signal having an embedded clock signal from an interrogator device, and convert the optical signal into an electrical signal comprising the embedded clock signal; clock extraction circuitry configured to extract the embedded clock signal from the electrical signal, and output the extracted clock signal as a clock signal for controlling clocking functions of the tag device; voltage regulator circuitry configured to generate a regulated supply voltage from the electrical signal, wherein the regulated supply voltage is utilized as a bias voltage for components of the tag device; and data transmitter circuitry configured to wirelessly transmit tag data to the interrogator device.Type: ApplicationFiled: March 31, 2015Publication date: October 6, 2016Inventors: Daniel J. Friedman, Duixian Liu, Mihai A. Sanduleanu
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Publication number: 20160270099Abstract: Wireless packet switches and enclosures include multiple port controllers, each in communication with a respective wireless transceiver, configured to analyze data streams to and from the respective wireless transceiver. A cross-connect switch is in communication with all of the port controllers and is configured to provide connections between respective port controllers. An arbiter is in communication with all of the port controllers and with the cross-connect switch and is configured to control the cross-connect switch, such that the cross-connect switch connects data streams of the port controllers in accordance with packet destination information and scheduling information from the port controllers.Type: ApplicationFiled: May 20, 2016Publication date: September 15, 2016Inventors: MIHAI A. SANDULEANU, Laurent Schares
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Patent number: 9354266Abstract: A device and method for measuring jitter includes a capacitive element capable of being selectively charged, wherein the selection is made by a received signal from which an accumulated jitter value is to be determined. An analog-to-digital converter is coupled to the capacitive element to determine a voltage across the capacitive element after a number of cycles of the received signal. A determination module is coupled to the analog-to-digital converter to output the accumulated jitter value of the received signal using the voltage, wherein the accumulated jitter value is accumulated over the number of cycles.Type: GrantFiled: June 7, 2012Date of Patent: May 31, 2016Assignee: GLOBALFOUNDRIES INC.Inventor: Mihai A. Sanduleanu
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Patent number: 9268017Abstract: Systems and method for near-field millimeter wave imaging are provided, in particular, near-field millimeter wave imaging systems and methods that enable sub-wavelength resolution imaging by scanning objects with sub-wavelength probe elements and capturing and measuring phase and intensity of reflected energy to generate images.Type: GrantFiled: July 10, 2012Date of Patent: February 23, 2016Assignee: International Business Machines CorporationInventors: Aydin Babakhani, Duixian Liu, Scott K. Reynolds, Mihai A. Sanduleanu
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Publication number: 20150362583Abstract: A polarimetric transceiver front-end includes two receive paths configured to receive signals from an antenna, each receive path corresponding to a respective polarization. Each front-end includes a variable amplifier and a variable phase shifter; a first transmit path configured to send signals to the antenna, where the transmit path is connected to the variable phase shifter of one of the two receive paths and includes a variable amplifier; and a transmit/receive switch configured to select between the first transmit path and the two receive paths for signals, where the transmit/receive switch includes a quarter-wavelength transmission line that adds a high impedance to the transmit path when the transmit/receive switch is in a receiving state.Type: ApplicationFiled: August 27, 2015Publication date: December 17, 2015Inventors: HERSCHEL A. AINSPAN, MARK FERRISS, ARUN S. NATARAJAN, BENJAMIN D. PARKER, JEAN-OLIVER PLOUCHART, SCOTT K. REYNOLDS, MIHAI A. SANDULEANU, ALBERTO VALDES GARCIA
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Patent number: 9191057Abstract: A polarimetric transceiver front-end includes two receive paths configured to receive signals from an antenna, each receive path corresponding to a respective polarization. Each front-end includes a variable amplifier and a variable phase shifter; a first transmit path configured to send signals to the antenna, where the transmit path is connected to the variable phase shifter of one of the two receive paths and includes a variable amplifier; and a transmit/receive switch configured to select between the first transmit path and the two receive paths for signals, where the transmit/receive switch includes a quarter-wavelength transmission line that adds a high impedance to the transmit path when the transmit/receive switch is in a receiving state.Type: GrantFiled: May 29, 2013Date of Patent: November 17, 2015Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Herschel A. Ainspan, Mark Ferriss, Arun S. Natarajan, Benjamin D. Parker, Jean-Oliver Plouchart, Scott K. Reynolds, Mihai A. Sanduleanu, Alberto Valdes Garcia
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Patent number: 9190953Abstract: An oscillator and a method of fabricating the oscillator are described. The oscillator includes a resonator with a plurality of transmission lines. An oscillation frequency of the oscillator is independent of at least one dimension of the plurality of transmission lines. The oscillator also includes a negative resistance circuit coupled to the resonator that cancels internal loss resistance of the resonator.Type: GrantFiled: January 14, 2014Date of Patent: November 17, 2015Assignee: GLOBALFOUNDRIES INC.Inventors: Mihai A. Sanduleanu, Bodhisatwa Sadhu
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Patent number: 9190951Abstract: There is provided an integrated electronic circuit. The integrated electronic circuit includes a voltage controlled oscillator and a frequency doubler connected to the voltage controlled oscillator. A frequency doubling input of the frequency doubler is load isolated from an output of the voltage controlled oscillator.Type: GrantFiled: October 10, 2013Date of Patent: November 17, 2015Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Bodhisatwa Sadhu, Mihai A. Sanduleanu, Alberto Valdes Garcia, Scott K. Reynolds
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Patent number: 9172326Abstract: An oscillator and a method of fabricating the oscillator are described. The oscillator includes a resonator with a plurality of transmission lines. An oscillation frequency of the oscillator is independent of at least one dimension of the plurality of transmission lines. The oscillator also includes a negative resistance circuit coupled to the resonator that cancels internal loss resistance of the resonator.Type: GrantFiled: September 25, 2013Date of Patent: October 27, 2015Assignee: GLOBALFOUNDRIES INC.Inventors: Mihai A. Sanduleanu, Bodhisatwa Sadhu
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Publication number: 20150281064Abstract: A wireless packet switch and methods for controlling the same include a multiple port controllers, each in communication with a respective wireless transceiver, configured to analyze data streams to and from the respective wireless transceiver; a cross-connect switch in communication with all of the port controllers, configured to provide connections between respective port controllers; an arbiter, in communication with all of the port controllers and with the cross-connect switch, configured to control the cross-connect switch, such that the cross-connect switch connects data streams of the port controllers in accordance with packet destination information and scheduling information from the port controllers.Type: ApplicationFiled: March 31, 2014Publication date: October 1, 2015Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Mihai A. Sanduleanu, Laurent Schares
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Patent number: 9093949Abstract: There is provided an integrated electronic circuit. The integrated electronic circuit includes a voltage controlled oscillator and a frequency doubler connected to the voltage controlled oscillator. A frequency doubling input of the frequency doubler is load isolated from an output of the voltage controlled oscillator.Type: GrantFiled: September 19, 2013Date of Patent: July 28, 2015Assignee: International Business Machines CorporationInventors: Bodhisatwa Sadhu, Mihai A. Sanduleanu, Alberto Valdes Garcia, Scott K. Reynolds
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Patent number: 8994456Abstract: A multi-stage amplifier is provided that uses tunable transmission lines, as well as a calibration method for the multi-stage amplifiers. A multi-stage amplifier, comprises a plurality of tunable amplification stages, wherein each of the tunable amplification stages comprises a tunable resonator based on a transmission line having a tunable element. The tunable elements may vary a capacitance or an inductance to tune a frequency of an applied signal. A calibration method is provided for a multi-stage amplifier having a plurality of transmission lines, an input stage and an output stage. The multi-stage amplifier is calibrated by generating a signal to determine a frequency for a substantially maximum power; generating an error signal by comparing the frequency for the substantially maximum power with a desired frequency; varying a digital control code applied to each of the tunable transmission lines, input stage and output stage until the error signal satisfies predefined criteria.Type: GrantFiled: January 30, 2012Date of Patent: March 31, 2015Assignee: International Business Machines CorporationInventors: Mihai A. Sanduleanu, Alberto Valdes Garcia, David Goren, Shlomo Shlafman, Danny Elad