Patents by Inventor Ariel Leonardo Vera Villarroel
Ariel Leonardo Vera Villarroel 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: 20230170852Abstract: Various embodiments of the invention provide for an AC-coupling method and systems that utilize a nested loop circuit to generate a differential mode output that facilitates an offset compensation and a common mode output that facilitates DC-biasing of an active circuit. In embodiments, the nested loop circuit comprises a differential amplifier and a differential mode loop that generates a differential mode output and a common mode loop that uses a common mode voltage and a reference voltage to generate the common mode output.Type: ApplicationFiled: November 16, 2022Publication date: June 1, 2023Applicant: Maxim Integrated Products, Inc.Inventors: Ariel Leonardo Vera Villarroel, Ronald F. Talaga, JR., Abdelrahman Hesham Elsayed Ahmed, Jianwei Wang
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Patent number: 11309845Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's with reconfigurable feedback resistors, which are adjustable based on the level of power, e.g. current, generated by the photodetector, and variable load resistors, which are adjustable based on the change in impedance caused by the change in the feedback resistor.Type: GrantFiled: April 2, 2020Date of Patent: April 19, 2022Assignee: Nokia Solutions and Networks OyInventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
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Patent number: 11133874Abstract: Encoders and decoders for encoding and decoding data according to a coding scheme. The encoder converts N bits of input data into M voltage signals for transmission over M parallel wires to a decoder having one or two decoding stages that recover the N bits of data from the M voltage signals. The coding scheme is an N-bit, M-wire PAM-Q code in which each voltage signal wi has one of Q voltage levels l1-lQ, where l1<l2< . . . <lQ, and the different sets of M voltage signals for the different N-bit input values are permutations of a single set of M voltage signals. The decoder has a comparator stage. For the decoder having one other decoding stage, the other decoding stage is a computation stage or a logic stage that is before or after the comparator stage.Type: GrantFiled: January 24, 2020Date of Patent: September 28, 2021Assignee: Nokia Solutions and Networks OyInventors: Ariel Leonardo Vera Villarroel, Gerhard Kramer
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Publication number: 20210234618Abstract: Encoders and decoders for encoding and decoding data according to a coding scheme. The encoder converts N bits of input data into M voltage signals for transmission over M parallel wires to a decoder having one or two decoding stages that recover the N bits of data from the M voltage signals. The coding scheme is an N-bit, M-wire PAM-Q code in which each voltage signal wi has one of Q voltage levels I1-IQ, where I1<I2< . . . <IQ, and the different sets of M voltage signals for the different N-bit input values are permutations of a single set of M voltage signals. The decoder has a comparator stage. For the decoder having one other decoding stage, the other decoding stage is a computation stage or a logic stage that is before or after the comparator stage.Type: ApplicationFiled: January 24, 2020Publication date: July 29, 2021Applicants: Nokia Solutions and Networks Oy, Technische Universität MünchenInventors: Ariel Leonardo Vera Villarroel, Gerhard Kramer
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Patent number: 11006193Abstract: An electro-optical apparatus having an ASIC electrically linked, by way of a multistage SerDes, to an array of optical data transmitters and receivers. In an example embodiment, a first SerDes stage is connected to the ASIC by a plurality of relatively wide, short electrical buses and further connected to a second SerDes stage by a plurality of narrower, longer electrical buses. The second SerDes stage is located in close proximity to the transmitter/receiver array to enable the signals transmitted therebetween to be switched at a high frequency rate, e.g., higher than 500 MHz. The width and length of said narrower, longer electrical buses are selected such as to support a high overall data throughput for the corresponding electrical data links between the ASIC and the transmitter/receiver array while being able to afford acceptable levels of signal integrity, power usage, and timing skews in these links.Type: GrantFiled: October 8, 2019Date of Patent: May 11, 2021Assignee: NOKIA SOLUTIONS AND NETWORKS OYInventors: Ariel Leonardo Vera Villarroel, Michael Noll
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Publication number: 20210105547Abstract: An electro-optical apparatus having an ASIC electrically linked, by way of a multistage SerDes, to an array of optical data transmitters and receivers. In an example embodiment, a first SerDes stage is connected to the ASIC by a plurality of relatively wide, short electrical buses and further connected to a second SerDes stage by a plurality of narrower, longer electrical buses. The second SerDes stage is located in close proximity to the transmitter/receiver array to enable the signals transmitted therebetween to be switched at a high frequency rate, e.g., higher than 500 MHz. The width and length of said narrower, longer electrical buses are selected such as to support a high overall data throughput for the corresponding electrical data links between the ASIC and the transmitter/receiver array while being able to afford acceptable levels of signal integrity, power usage, and timing skews in these links.Type: ApplicationFiled: October 8, 2019Publication date: April 8, 2021Applicant: Nokia Solutions and Networks OYInventors: Ariel Leonardo Vera Villarroel, Michael Noll
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Patent number: 10965252Abstract: Modern modulator drivers must be capable of delivering a large output voltage into a tens of ohms modulator, while minimizing the amount of distortion added by the driver. The driver should deliver the output voltage without exceeding a maximum distortion while minimizing the DC power consumption. Accordingly, a modulator driver includes a final stage amplifier with auxiliary transistors that turn on when the conventional differential pair of transistors approaches their maximum voltage of the linear region of their transfer function, thereby providing a more linear transfer function, in particular at large input voltages.Type: GrantFiled: June 30, 2020Date of Patent: March 30, 2021Inventors: Ariel Leonardo Vera Villarroel, Mohamed Megahed Mabrouk Megahed, Alexander Rylyakov
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Patent number: 10958230Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's and VGA's with reconfigurable sizes, which are adjustable based on the level of power, e.g. current, generated by the photodetector.Type: GrantFiled: September 10, 2018Date of Patent: March 23, 2021Assignee: Elenion Technologies, LLCInventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
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Patent number: 10955691Abstract: Within a modulator driver, different blocks are employed, e.g. a buffer, one or more variable gain amplifiers (VGA), and a final driver stage. Each of these blocks has an optimum bias point for best performance; however, interconnecting the blocks requires sharing the DC bias points in their interface, which does not necessarily match the optimum performance bias point of each block. Accordingly, a first offset feedback loop extending from reference points after a selected one of the blocks to an input of one of the blocks. The first offset feedback loop includes current sources capable of delivering a variable current to the input of the selected block in order to compensate any offset in an amplified differential input electrical signal measured at the reference points. A first bias feedback loop is also provided, including a current sinker for subtracting excess current introduced in the first offset compensation feedback loop.Type: GrantFiled: June 13, 2019Date of Patent: March 23, 2021Assignee: Elenion Technologies, LLCInventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Daihyun Lim, Alexander Rylyakov
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Patent number: 10931381Abstract: In optical receivers, cancelling the DC component of the incoming current is a key to increasing the receiver's effectiveness, and therefore increase the channel capacity. Ideally, the receiver includes a DC cancellation circuit for removing the DC component; however, in differential receivers an offset may be created between the output voltage components caused by the various amplifiers. Accordingly, an offset cancellation circuit is required to determine the offset and to modify the DC cancellation circuit accordingly.Type: GrantFiled: April 2, 2020Date of Patent: February 23, 2021Assignee: Elenion Technologies, LLCInventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
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Publication number: 20200393706Abstract: Within a modulator driver, different blocks are employed, e.g. a buffer, one or more variable gain amplifiers (VGA), and a final driver stage. Each of these blocks has an optimum bias point for best performance; however, interconnecting the blocks requires sharing the DC bias points in their interface, which does not necessarily match the optimum performance bias point of each block.. Accordingly, a first offset feedback loop extending from reference points after a selected one of the blocks to an input of one of the blocks. The first offset feedback loop includes current sources capable of delivering a variable current to the input of the selected block in order to compensate any offset in an amplified differential input electrical signal measured at the reference points. A first bias feedback loop is also provided, including a current sinker for subtracting excess current introduced in the first offset compensation feedback loop.Type: ApplicationFiled: June 13, 2019Publication date: December 17, 2020Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Daihyun Lim, Alexander Rylyakov
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Patent number: 10831081Abstract: A dual-differential optical modulator includes two optical waveguide arms, each including one or more phase modulating p/n junctions. The p/n junctions in each waveguide arm are electrically coupled between a same pair of single-ended transmission lines so as to be differentially push-pull modulated when the transmission line pair is connected to a differential driver. Either cathode or anode electrodes of the p/n junctions are AC coupled to the transmission lines and DC biased independently on the transmission line signals.Type: GrantFiled: September 27, 2019Date of Patent: November 10, 2020Assignee: Elenion Technologies, LLCInventors: Ariel Leonardo Vera Villarroel, Alexander Rylyakov, Yangjin Ma
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Publication number: 20200336109Abstract: Modern modulator drivers must be capable of delivering a large output voltage into a tens of ohms modulator, while minimizing the amount of distortion added by the driver. The driver should deliver the output voltage without exceeding a maximum distortion while minimizing the DC power consumption. Accordingly, a modulator driver includes a final stage amplifier with auxiliary transistors that turn on when the conventional differential pair of transistors approaches their maximum voltage of the linear region of their transfer function, thereby providing a more linear transfer function, in particular at large input voltages.Type: ApplicationFiled: June 30, 2020Publication date: October 22, 2020Inventors: Ariel Leonardo Vera Villarroel, Mohamed Megahed Mabrouk Megahed, Alexander Rylyakov
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Publication number: 20200235705Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's with reconfigurable feedback resistors, which are adjustable based on the level of power, e.g. current, generated by the photodetector, and variable load resistors, which are adjustable based on the change in impedance caused by the change in the feedback resistor.Type: ApplicationFiled: April 2, 2020Publication date: July 23, 2020Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
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Publication number: 20200235820Abstract: In optical receivers, cancelling the DC component of the incoming current is a key to increasing the receiver's effectiveness, and therefore increase the channel capacity. Ideally, the receiver includes a DC cancellation circuit for removing the DC component; however, in differential receivers an offset may be created between the output voltage components caused by the various amplifiers. Accordingly, an offset cancellation circuit is required to determine the offset and to modify the DC cancellation circuit accordingly.Type: ApplicationFiled: April 2, 2020Publication date: July 23, 2020Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
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Patent number: 10644805Abstract: In optical receivers, cancelling the DC component of the incoming current is a key to increasing the receiver's effectiveness, and therefore increase the channel capacity. Ideally, the receiver includes a DC cancellation circuit for removing the DC component; however, in differential receivers an offset may be created between the output voltage components caused by the various amplifiers. Accordingly, an offset cancellation circuit is required to determine the offset and to modify the DC cancellation circuit accordingly.Type: GrantFiled: October 29, 2019Date of Patent: May 5, 2020Assignee: Elenion Technologies, LLCInventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
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Patent number: 10644652Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's with reconfigurable feedback resistors, which are adjustable based on the level of power, e.g. current, generated by the photodetector, and variable load resistors, which are adjustable based on the change in impedance caused by the change in the feedback resistor.Type: GrantFiled: September 10, 2018Date of Patent: May 5, 2020Assignee: Elenion Technologies, LLCInventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
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Publication number: 20200136560Abstract: Modern modulator drivers must be capable of delivering a large output voltage into a tens of ohms modulator, while minimizing the amount of distortion added by the driver. The driver should deliver the output voltage without exceeding a maximum distortion while minimizing the DC power consumption. Accordingly, a modulator driver includes a final stage amplifier with auxiliary transistors that turn on when the conventional differential pair of transistors approaches their maximum voltage of the linear region of their transfer function, thereby providing a more linear transfer function, in particular at large input voltages.Type: ApplicationFiled: October 29, 2018Publication date: April 30, 2020Inventors: Ariel Leonardo Vera Villarroel, Mohamed Megahed Mabrouk Megahed, Alexander Rylyakov
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Publication number: 20200092010Abstract: In optical receivers, cancelling the DC component of the incoming current is a key to increasing the receiver's effectiveness, and therefore increase the channel capacity. Ideally, the receiver includes a DC cancellation circuit for removing the DC component; however, in differential receivers an offset may be created between the output voltage components caused by the various amplifiers. Accordingly, an offset cancellation circuit is required to determine the offset and to modify the DC cancellation circuit accordingly.Type: ApplicationFiled: October 29, 2019Publication date: March 19, 2020Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov
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Publication number: 20200083855Abstract: In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's and VGA's with reconfigurable sizes, which are adjustable based on the level of power, e.g. current, generated by the photodetector.Type: ApplicationFiled: September 10, 2018Publication date: March 12, 2020Inventors: Ariel Leonardo Vera Villarroel, Abdelrahman Ahmed, Alexander Rylyakov