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11.发明授权公开(公告)号：US10797720B2
公开(公告)日：2020-10-06
申请号：US16367712
申请日：2019-03-28
Applicant: QUALCOMM Incorporated
Inventor： Eunyung Sung , Nitz Saputra , Behnam Sedighi , Ashok Swaminathan , Honghao Ji , Shahin Mehdizad Taleie , Dongwon Seo
Abstract: A current digital-to-analog converter includes a binary current-generating section configured to generate a binary-weighted current based on a first set of control signals; a unary current-generating section configured to generate a unary-weighted current based on a second set of control signals; and a current combining circuit configured to add or subtract a reference current and a current generated by a current source of the unary current-generating section using the binary-weighted current.
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公开(公告)号：US10686476B1
公开(公告)日：2020-06-16
申请号：US16417455
申请日：2019-05-20
Applicant: QUALCOMM Incorporated
Inventor： Shahin Mehdizad Taleie , Nitz Saputra , Chen Jiang , Behnam Sedighi , Ibrahim Ramez Chamas , Bhushan Shanti Asuri , Dongwon Seo
Abstract: An RF-DAC transmitter is provided that includes an in-phase channel, a quadrature-phase channel, a first intermediate-phase channel, and a second intermediate-phase channel. Each channel includes a pair of interleaved RF-DACs for producing a pair of interleaved RF signals and a subtractor.
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公开(公告)号：US10666285B1
公开(公告)日：2020-05-26
申请号：US16202723
申请日：2018-11-28
Applicant: QUALCOMM Incorporated
Inventor： Shahin Mehdizad Taleie , Behnam Sedighi , Dongwon Seo , Parisa Mahmoudidaryan , Bhushan Shanti Asuri , Sang-June Park , Shrenik Patel
IPC: H03M1/66
Abstract: Certain aspects of the present disclosure generally relate to circuitry and techniques for digital-to-analog conversion. One example system for digital-to-analog conversion generally includes a first digital-to-analog converter (DAC) having an input coupled to an input node of the system and a mixing-mode DAC having an input coupled to an input node of the system. The mixing-mode DAC may include a second DAC and a mixer, an output of the second DAC being coupled to an input of the mixer. The system may also include a combiner, wherein an output of the first DAC is coupled to a first input of the combiner, and wherein an output of the mixer is coupled to a second input of the combiner.
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公开(公告)号：US10454509B2
公开(公告)日：2019-10-22
申请号：US15962865
申请日：2018-04-25
Applicant: QUALCOMM Incorporated
Inventor： Bhushan Shanti Asuri , Krishnaswamy Thiagarajan , Ashok Swaminathan , Shahin Mehdizad Taleie , Yen-Wei Chang , Vinod Panikkath , Sameer Vasantlal Vora , Ayush Mittal , Tonmoy Biswas , Sy-Chyuan Hwu , Zhilong Tang , Ibrahim Chamas , Ping Wing Lai , Behnam Sedighi , Dongwon Seo , Nitz Saputra
Abstract: A communication circuit may include a first pair of digital-to-analog converters (DACs) coupled to an input of a first mixer and configured to generate first baseband signals. The communication circuit may further include a second pair of DACs coupled to an input of a second mixer and configured to generate second baseband signals. The second baseband signals may be shifted in phase relative to the first baseband signals.
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公开(公告)号：US09379727B1
公开(公告)日：2016-06-28
申请号：US14628996
申请日：2015-02-23
Applicant: QUALCOMM Incorporated
Inventor： Dongwon Seo , Yang You , Honghao Ji , Tongyu Song , Ganesh Saripalli , Shahin Mehdizad Taleie
IPC: H03M1/06 , H03M1/70 , H04B1/04 , G05F3/18 , G05F1/56 , H03M1/00 , H03M1/74 , G05F1/575 , H02M3/156
CPC classification number: H03M1/0604 , G05F1/56 , G05F1/575 , G05F3/18 , H02M3/156 , H03F3/24 , H03M1/00 , H03M1/70 , H03M1/747 , H04B1/0475 , H04B2001/0408
Abstract: A method and apparatus for attenuating transmit digital to analog converter (DAC) spurs is provided. The method begins when a reference voltage is injected into an amplifier. Next, an output of the ground low drop-out regulator is measured and is them compared with the reference voltage. The output of the amplifier is then adjusted based on the results of the comparison. If the reference voltage is higher then the output of the ground low drop-out regulator the output of the amplifier is adjusted to ground. If the reference voltage is lower than the output of the ground low drop-out regulator then the output of the amplifier is adjusted to match the reference voltage.
Abstract translation: 提供了用于衰减发射数模转换器（DAC）杂散的方法和装置。 当将参考电压注入放大器时，该方法开始。 接下来，测量接地低压降稳压器的输出，并将其与参考电压进行比较。 然后根据比较结果调整放大器的输出。 如果参考电压较高，则接地低压降稳压器的输出将放大器的输出调整到地。 如果参考电压低于接地低压降稳压器的输出，则调节放大器的输出以匹配参考电压。
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Patent Agency Ranking
16.发明授权公开(公告)号：US09337855B2
公开(公告)日：2016-05-10
申请号：US14532264
申请日：2014-11-04
Applicant: QUALCOMM Incorporated
Inventor： Ganesh Ramachandra Murthy Saripalli , Shahin Mehdizad Taleie , Michael Joseph McGowan , Jenny Kuo , Dongwon Seo , Jalal Ahmad Elhusseini
CPC classification number: H03M1/1009 , H03M1/1019 , H03M1/66 , H03M1/68 , H03M1/742
Abstract: A method and apparatus for a method of calibrating a transmit digital to analog converter full-scale current. The method comprises generating a tuned reference current and then calibrating the tuned reference current to a selected value in order to produce a predetermined current value. The calibration further comprises dividing a reference voltage input over a resistor string. A band gap current is then generated using the divided reference voltage input. A tuned current output is then produced from a current steering digital to analog converter with the tuned output current stored in a register. The reference current for the transmit DAC is then generated based on the stored tuned output current.
Abstract translation: 一种用于校准发射数模转换器满量程电流的方法和装置。 该方法包括产生调谐的参考电流，然后将调谐的参考电流校准到选定的值，以便产生预定的电流值。 该校准还包括对在电阻串上输入的参考电压进行分频。 然后使用划分的参考电压输入产生带隙电流。 然后，从调节输出电流存储在寄存器中的当前转向数字到模拟转换器产生调谐电流输出。 然后基于存储的调谐输出电流产生发射DAC的参考电流。
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公开(公告)号：US20210242958A1
公开(公告)日：2021-08-05
申请号：US16778608
申请日：2020-01-31
Applicant: QUALCOMM Incorporated
Inventor： Igor Gutman , Shahin Mehdizad Taleie , Oren Matsrafi , Ronen Greenberger , Gal Keret , Yossi Waldman , Gideon Shlomo Kutz
Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a downlink control message from a base station indicating a modulation and coding scheme (MCS) associated with an uplink transmission, a number of layers associated with the uplink transmission, or both. The UE may determine to adjust (for example, reduce) a first number of bits based on the MCS, the number of layers, or both. The first number of bits may include an effective number of bits (ENOB) supported at a digital-to-analog converter (DAC) of the UE, a number of bits (NOB) supported at a transmission front end (TxFE) component of the UE, or both. The UE may transmit the uplink transmission to the base station according to the adjusted first number of bits.
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公开(公告)号：US10516412B1
公开(公告)日：2019-12-24
申请号：US16138499
申请日：2018-09-21
Applicant: QUALCOMM INCORPORATED
Inventor： Shahin Mehdizad Taleie , Ashok Swaminathan , Sudharsan Kanagaraj , Negar Rashidi , Siyu Yang , Behnam Sedighi , Honghao Ji , Jaswinder Singh , Andrew Weil , Dongwon Seo , Xilin Liu
Abstract: An interleaved digital-to-analog converter (DAC) system may include a first sub-DAC and a second sub-DAC and may be configured to provide both a converter output signal and a calibration output signal. The converter output signal may be provided by adding the first sub-DAC output signal and the second sub-DAC output signal. The calibration output signal may be provided by subtracting one of the first and second sub-DAC output signals from the other. The calibration output signal may be used as feedback to adjust the phase of one of the sub-DACs relative to the other, to promote phase matching their output signals.
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公开(公告)号：US20190305859A1
公开(公告)日：2019-10-03
申请号：US16404519
申请日：2019-05-06
Applicant: Qualcomm Incorporated
Inventor： Roberto Rimini , Udara Fernando , Shahin Mehdizad Taleie
Abstract: An apparatus is disclosed for proximity detection using a hybrid-transceiver. In an example aspect, the apparatus includes a hybrid transceiver coupled to a first antenna and a second antenna. The hybrid transceiver is configured to generate, in a digital domain, a digital baseband radar signal. The hybrid transceiver is also configured to transmit, via the first antenna, a radio-frequency transmit signal that is derived from the digital baseband radar signal. Via the second antenna, the hybrid transceiver is configured to receive a radio-frequency receive signal, which includes a portion of the radio-frequency transmit signal that is reflected by an object. In an analog domain, the hybrid transceiver is configured to generate an analog receive signal that includes a beat frequency, which is indicative of a frequency offset between the radio-frequency transmit signal and the radio-frequency receive signal. The analog receive signal is derived from the radio-frequency receive signal.
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公开(公告)号：US20160248432A1
公开(公告)日：2016-08-25
申请号：US14631578
申请日：2015-02-25
Applicant: QUALCOMM, Incorporated
Inventor： Mohammadhossein Naderi Alizadeh , Shahin Mehdizad Taleie , Dongwon Seo
CPC classification number: H03M1/0626 , H03M1/002 , H03M1/687 , H03M3/368 , H03M3/502 , H03M7/3042
Abstract: In one embodiment, a method for converting an input digital signal into an analog signal is provided. The method comprises modulating the input digital signal into a modulated digital signal, and converting the modulated digital signal into the analog signal using a digital-to-analog converter (DAC). The modulation shapes quantization noise of the DAC to place a notch at a frequency within an out-of-bound frequency band to reduce the quantization noise within the out-of-bound frequency band.
Abstract translation: 在一个实施例中，提供了一种将输入数字信号转换为模拟信号的方法。 该方法包括将输入数字信号调制成调制数字信号，并使用数模转换器（DAC）将调制的数字信号转换为模拟信号。 调制形成DAC的量化噪声，以将陷波放置在超出频带内的频率上，以减小超出频带内的量化噪声。
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