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Patent Agency Ranking
公开(公告)号：US20220239304A1
公开(公告)日：2022-07-28
申请号：US17538746
申请日：2021-11-30
Applicant: Texas Instruments Incorporated
Inventor： Karthikeyan GUNASEKARAN , Snehasish ROYCHOWDHURY , Rakesh MANJUNATH , Aswath V S , Sthanunathan RAMAKRISHNAN , Sarma Sudareswara GUNTURI , Rahul SHARMA , Jagannathan VENKATARAMAN , Nagarajan VISWANATHAN
Abstract: A spur correction system for a transmit chain having an interleaving multiplexer. In some embodiments, the spur correction system includes a spur sense chain, a correction controller, and a Q path corrector. The interleaving multiplexer combines signals from multiple bands in response to a clock signal. The spur sense chain estimates an error that is in phase with the clock signal (an I-phase error) and an error that is a derivative of the clock signal (a Q-phase error). The correction controller compensates for the estimated I-phase error by injecting an I-phase correction signal into the transmit chain. The Q path corrector compensates for the estimated Q-phase error by selectively connecting one or more capacitors within the interleaving multiplexer.
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公开(公告)号：US20200177130A1
公开(公告)日：2020-06-04
申请号：US16274519
申请日：2019-02-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rahul SHARMA , Jagannathan VENKATARAMAN , Eeshan MIGLANI , Sandeep Kesrimal OSWAL
Abstract: A system includes a Zero IF transmitter having a mixer and a programmable gain stage. The Zero IF transmitter also includes an intermediate stage between the mixer and the programmable gain stage, wherein the intermediate stage is configured to decouple the mixer and the programmable gain stage.
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公开(公告)号：US20210159910A1
公开(公告)日：2021-05-27
申请号：US17168584
申请日：2021-02-05
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Srinivasa Rao MADALA , Rahul SHARMA , Sandeep Kesrimal OSWAL
Abstract: A digital-to-analog converter system has digital-to-analog converters, a common output, and a digital controller for transmitting first codes to one of the converters at a radio-frequency digital rate, and for transmitting second codes to another one of the converters at the same rate. The digital controller includes a timing system for operating each converter at the digital rate in a return-to-zero configuration, such that a signal from the first converter is transmitted to the common output while the second converter is reset, and vice versa. The digital-to-analog converter system can generate a radio-frequency analog signal having signals in first and second Nyquist zones simultaneously.
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公开(公告)号：US20200212928A1
公开(公告)日：2020-07-02
申请号：US16555160
申请日：2019-08-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Srinivasa Rao MADALA , Rahul SHARMA , Sandeep Kesrimal OSWAL
Abstract: A digital-to-analog converter system has digital-to-analog converters, a common output, and a digital controller for transmitting first codes to one of the converters at a radio-frequency digital rate, and for transmitting second codes to another one of the converters at the same rate. The digital controller includes a timing system for operating each converter at the digital rate in a return-to-zero configuration, such that a signal from the first converter is transmitted to the common output while the second converter is reset, and vice versa. The digital-to-analog converter system can generate a radio-frequency analog signal having signals in first and second Nyquist zones simultaneously.
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公开(公告)号：US20210152126A1
公开(公告)日：2021-05-20
申请号：US17158449
申请日：2021-01-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rahul SHARMA , Jagannathan VENKATARAMAN , Eeshan MIGLANI , Sandeep Kesrimal OSWAL
Abstract: A system includes a Zero IF transmitter having a mixer and a programmable gain stage. The Zero IF transmitter also includes an intermediate stage between the mixer and the programmable gain stage, wherein the intermediate stage is configured to decouple the mixer and the programmable gain stage.
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