公开(公告)号：US11184018B1

公开(公告)日：2021-11-23

申请号：US17087234

申请日：2020-11-02

Applicant: QUALCOMM Incorporated

Inventor： Xilin Liu ,  Parisa Mahmoudidaryan ,  Shahin Mehdizad Taleie ,  Negar Rashidi ,  Dongwon Seo

IPC: H03M1/18 ,  H03M1/82 ,  H03M1/06 ,  H03M1/10 ,  H03K5/156 ,  H03K5/05 ,  H03M1/80 ,  H03K5/00

Abstract: Certain aspects of the present disclosure generally relate to circuitry and techniques for digital-to-analog conversion. For example, certain aspects provide an apparatus for digital-to-analog conversion. The apparatus generally includes a mixing-mode digital-to-analog converter (DAC), a duty cycle adjustment circuit having an input coupled to an input clock node and having an output coupled to a clock input of the mixing-mode DAC, and a current comparison circuit having inputs coupled to outputs of the mixing-mode DAC and having an output coupled to a control input of the duty cycle adjustment circuit.

公开(公告)号：US09853654B2

公开(公告)日：2017-12-26

申请号：US14631578

申请日：2015-02-25

Applicant: QUALCOMM, Incorporated

Inventor： Mohammadhossein Naderi Alizadeh ,  Shahin Mehdizad Taleie ,  Dongwon Seo

IPC: H03M1/68 ,  H03M3/00 ,  H03M7/30 ,  H03M1/06 ,  H03M1/00

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.

公开(公告)号：US11728822B2

公开(公告)日：2023-08-15

申请号：US17359918

申请日：2021-06-28

Applicant: QUALCOMM Incorporated

Inventor： Shahin Mehdizad Taleie ,  Dongwon Seo ,  Ashok Swaminathan ,  Gurkanwal Singh Sahota ,  Andrew Weil ,  Haibo Fei

IPC: H03M1/74 ,  H03M1/46 ,  H03M1/50 ,  H03M1/78 ,  H03M1/00 ,  H03M1/12

CPC classification number: H03M1/747 ,  H03M1/002 ,  H03M1/1295 ,  H03M1/466 ,  H03M1/502 ,  H03M1/742 ,  H03M1/785

Abstract: Certain aspects of the present disclosure provide a digital-to-analog converter (DAC) system. The DAC system generally includes a plurality of current steering cells, each comprising a current source coupled to at least two current steering switches, wherein control inputs of the at least two current steering switches are coupled to an input path of the DAC system. The DAC system may also include a current source toggle circuit configured to selectively disable the current source of at least one of the plurality of current steering cells, and a feedforward path coupled between the input path and at least one control input of the current source toggle circuit.

公开(公告)号：US20200099389A1

公开(公告)日：2020-03-26

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

IPC: H03M1/74 ,  H03M1/68 ,  H03M1/78

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.

公开(公告)号：US11387933B2

公开(公告)日：2022-07-12

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

IPC: H04L1/00 ,  H03M1/66 ,  H04W72/04 ,  H04W52/14

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.

公开(公告)号：US10663572B2

公开(公告)日：2020-05-26

申请号：US16012193

申请日：2018-06-19

Applicant: QUALCOMM Incorporated

Inventor： Shahin Mehdizad Taleie ,  Chen Jiang ,  Dongwon Seo ,  Udara Fernando ,  Shrenik Patel ,  Roberto Rimini ,  Anant Gupta

IPC: H04B1/40 ,  G01S13/34 ,  G01S13/02 ,  H04L27/36 ,  H03M1/66 ,  H04L27/38

Abstract: Certain aspects of the present disclosure generally relate to a programmable multi-mode digital-to-analog converter (DAC) for generating a frequency-modulated signal. For example, certain aspects provide a circuit for sweeping a frequency of an output signal. The circuit generally includes a DAC having an input coupled to an input path of the circuit and an output coupled to an output path of the circuit, a first mixer selectively incorporated in the input path coupled to the input of the DAC, and a second mixer selectively incorporated in the output path coupled to the output of the DAC.

公开(公告)号：US10651957B2

公开(公告)日：2020-05-12

申请号：US16404519

申请日：2019-05-06

Applicant: Qualcomm Incorporated

Inventor： Roberto Rimini ,  Udara Fernando ,  Shahin Mehdizad Taleie

IPC: H04B17/27 ,  H04B5/00 ,  G01S13/34 ,  G01S13/86 ,  G01S13/88 ,  H04W8/00 ,  H04W4/02 ,  H04W4/80

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.

公开(公告)号：US10305611B1

公开(公告)日：2019-05-28

申请号：US15939038

申请日：2018-03-28

Applicant: Qualcomm Incorporated

Inventor： Roberto Rimini ,  Udara Fernando ,  Shahin Mehdizad Taleie

IPC: H04B17/27 ,  H04B5/00 ,  H04W8/00 ,  H04W4/02 ,  H04W4/80

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.

公开(公告)号：US11621716B1

公开(公告)日：2023-04-04

申请号：US17448461

申请日：2021-09-22

Applicant: QUALCOMM Incorporated

Inventor： Parisa Mahmoudidaryan ,  Nitz Saputra ,  Dongwon Seo ,  Shahin Mehdizad Taleie

IPC: H03M1/66 ,  H03M1/06

Abstract: Certain aspects of the present disclosure generally relate to circuitry and techniques for digital-to-analog conversion. One example device for digital-to-analog conversion generally includes: a digital-to-analog converter (DAC) having an input coupled to an input node of the device; a first return-to-zero (RZ) DAC having an input coupled to an input node of the device; and a combiner, wherein an output of the first DAC is coupled to a first input of the combiner, and wherein an output of the first RZ DAC is coupled to a second input of the combiner.

公开(公告)号：US20200336541A1

公开(公告)日：2020-10-22

申请号：US16385400

申请日：2019-04-16

Applicant: QUALCOMM Incorporated

Inventor： Mohammadhossein Naderi Alizadeh ,  Shahin Mehdizad Taleie

IPC: H04L29/08 ,  G06F11/30 ,  G05D1/00 ,  H04L29/06

Abstract: Various aspects enable sensor data to be obtained from vehicles. Various aspects may enable data gathered by sensors of vehicles to be obtained by a data agency server and made available to third party client devices. In various aspects, a data agency server may direct a vehicle to drive from the vehicle's current location to a different specific location to gather a type of data. In some aspects, the type of data may be peripheral data that is not associated with driving operations of a vehicle. In some aspects, a data agency server may indicate one or more attributes of collection for the vehicle to utilize in gathering data. In some aspects, an attribute of collection may set a condition of the vehicle and/or the sensor utilized in gathering data. In some embodiments, vehicle owners/operators may be compensated for their vehicles being utilized to obtain data.