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公开(公告)号：WO2023049587A1
公开(公告)日：2023-03-30
申请号：PCT/US2022/075353
申请日：2022-08-23
Applicant: QUALCOMM INCORPORATED
Inventor： MIRHAJ, Seyed, Arash , SUN, Lei , GUO, Yuhua , DAGHER, Elias , AKHAVAN, Aram , WANG, Yan , ALLADI, Dinesh, Jagannath
Abstract: An apparatus is disclosed for pipelined analog-to-digital conversion. In an example aspect, the apparatus includes a pipelined analog-to-digital converter (ADC). The pipelined ADC includes a first stage and a second stage. The first stage includes a sampler and a quantizer coupled to the sampler. The first stage also includes a current distribution circuit coupled to the sampler. The second stage includes a sampler coupled to the current distribution circuit and a quantizer coupled to the sampler of the second stage.
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2.发明申请
公开(公告)号：WO2022026108A1
公开(公告)日：2022-02-03
申请号：PCT/US2021/039837
申请日：2021-06-30
Applicant: QUALCOMM INCORPORATED
Inventor： TANG, Yongjian , HSIEH, Chieh-Yu , SUN, Lei , MERUVA, Anand , MIRHAJ, Seyed Arash , GUO, Yuhua , ALLADI, Dinesh Jagannath
Abstract: Certain aspects provide a circuit for analog-to-digital conversion. The circuit generally includes a flash analog-to-digital converter (ADC) having a plurality of comparators, each comparator being configured to compare an input voltage to a reference voltage; and a calibration circuit coupled to the flash ADC and configured to tune the reference voltage prior to a conversion operation by the flash ADC.
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Patent Agency Ranking
公开(公告)号：WO2023009960A1
公开(公告)日：2023-02-02
申请号：PCT/US2022/073958
申请日：2022-07-20
Applicant: QUALCOMM INCORPORATED
Inventor： AKHAVAN, Aram , MIRHAJ, Seyed Arash , SUN, Lei , DAGHER, Elias
Abstract: An apparatus is disclosed for analog-to-digital conversion. In an example aspect, the apparatus includes an analog-to-digital converter (ADC). The ADC includes a reference-crossing detector having an input and an output. The ADC also includes a ramp generator coupled between the output of the reference- crossing detector and the input of the reference-crossing detector. The ADC further includes a voltage shifter coupled between the output of the reference- crossing detector and the input of the reference-crossing detector.
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公开(公告)号：WO2022241347A1
公开(公告)日：2022-11-17
申请号：PCT/US2022/071243
申请日：2022-03-21
Applicant: QUALCOMM INCORPORATED
Inventor： YAMAMOTO, Kentaro , AKHAVAN, Aram , KIRAN, Ganesh , SUN, Lei , DAGHER, Elias , ALLADI, Dinesh Jagannath
IPC: H03F1/30 , H03F1/22 , H03F3/45 , H03F3/72 , H03M1/44 , H03F1/223 , H03F1/301 , H03F1/303 , H03F2200/351 , H03F2200/447 , H03F2200/453 , H03F2203/45024 , H03F2203/45052 , H03F2203/45302 , H03F3/19 , H03F3/21 , H03F3/45188 , H03G3/3036 , H03M1/124 , H03M1/16
Abstract: An apparatus is disclosed for gain stabilization. In an example aspect, the apparatus includes an amplifier and a gain-stabilization circuit. The amplifier has a gain that is based on a bias voltage and an amplification control signal. The gain-stabilization circuit is coupled to the amplifier and includes a replica amplifier. The replica amplifier has a replica gain that is based on the bias voltage and the amplification control signal. The gain-stabilization circuit is configured to adjust at least one of the bias voltage or the amplification control signal based on a gain error associated with the replica amplifier.
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公开(公告)号：WO2020139460A1
公开(公告)日：2020-07-02
申请号：PCT/US2019/059232
申请日：2019-10-31
Applicant: QUALCOMM INCORPORATED
Inventor： SUN, Lei , KIRAN, Ganesh , MIRHAJ, Seyed Arash
IPC: G11C27/02 , H03K17/0412 , H03K17/06
Abstract: A bootstrapped switch circuit includes an auxiliary loop circuit for assisting the boosting of a bootstrap voltage in a main loop circuit having a bootstrapped switch transistor. The boosted bootstrap voltage switches on the bootstrapped switch transistor so that an input voltage signal may conduct through the bootstrapped switch transistor to charge a sampling node.
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公开(公告)号：WO2023023450A1
公开(公告)日：2023-02-23
申请号：PCT/US2022/074539
申请日：2022-08-04
Applicant: QUALCOMM INCORPORATED
Inventor： AKHAVAN, Aram , YAMAMOTO, Kentaro , SUN, Lei , KIRAN, Ganesh
Abstract: Techniques and apparatus for output common-mode control of dynamic amplifiers, as well as analog-to-digital converters (ADCs) and other circuits implemented with such dynamic amplifiers. One example amplifier circuit includes a dynamic amplifier and a current source. The dynamic amplifier generally includes differential inputs, differential outputs, transconductance elements coupled to the differential inputs, a first set of capacitive elements coupled to the differential outputs, and a control input for controlling a time length of amplification for the dynamic amplifier. The current source is configured to generate an output current such that portions of the output current are selectively applied to the differential outputs of the dynamic amplifier during at least a portion of the time length of amplification.
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7.发明申请
公开(公告)号：WO2022072964A1
公开(公告)日：2022-04-07
申请号：PCT/US2021/071343
申请日：2021-09-02
Applicant: QUALCOMM INCORPORATED
Inventor： SUN, Lei , JI, Honghao , YUAN, Dan
Abstract: Certain aspects of the present disclosure provide a successive approximation register (SAR) analog-to-digital converter (ADC) implemented with a digital filter for noise shaping. For example, certain aspects provide a circuit for analog-to-digital conversion having: a first digital-to-analog converter (DAC) having an output coupled to a sampling node; a comparator having an input coupled to the sampling node; SAR logic having an input coupled to an output of the comparator and at least one output coupled to an input of the first DAC; a quantizer configured to generate a first digital signal representing a voltage at the sampling node; a digital filter configured to apply a filter to the first digital signal; and a second DAC configured to generate an analog signal representing the filtered first digital signal and provide the analog signal to the sampling node.
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