公开(公告)号：US10284207B2

公开(公告)日：2019-05-07

申请号：US15812221

申请日：2017-11-14

Applicant: Maxlinear Asia Singapore PTE LTD.

Inventor： Mark Hiebert ,  Srinivasa Rao Madala ,  Hormoz Djahanshahi

IPC: H03L7/07 ,  H03B5/12

Abstract: Methods and systems are provided for adaptively configuring voltage-controlled oscillator (VCO) arrays, such as to reduce mismatches among the VCOs. A plurality of voltage-controlled oscillators (VCOs), connected in parallel to a common control input, and with each VCO outputting an oscillating signal based on the common control input and an adjustment input, may be configured to reduce mismatches among the VCOs. The plurality of VCO may be configured by adjusting at least one operational parameter applicable to interconnection paths connecting outputs of the plurality of VCOs; measuring a mismatch between signals at the outputs of the plurality of VCOs with respect to a first signal parameter; and adjusting a first operational parameter applicable to one or more of the plurality of VCOs to reduce mismatch between signals at the outputs of the plurality of VCOs with respect to a first signal parameter.

公开(公告)号：US20180138912A1

公开(公告)日：2018-05-17

申请号：US15812221

申请日：2017-11-14

Applicant: Maxlinear Asia Singapore PTE LTD.

Inventor： Mark Hiebert ,  Srinivasa Rao Madala ,  Hormoz Djahanshahi

IPC: H03L7/07 ,  H03B5/12

CPC classification number: H03L7/07 ,  H03B5/1212 ,  H03B5/124 ,  H03B5/1256 ,  H03B2200/0076

Abstract: Methods and systems are provided for adaptively configuring voltage-controlled oscillator (VCO) arrays, such as to reduce mismatches among the VCOs. A plurality of voltage-controlled oscillators (VCOs), connected in parallel to a common control input, and with each VCO outputting an oscillating signal based on the common control input and an adjustment input, may be configured to reduce mismatches among the VCOs. The plurality of VCO may be configured by adjusting at least one operational parameter applicable to interconnection paths connecting outputs of the plurality of VCOs; measuring a mismatch between signals at the outputs of the plurality of VCOs with respect to a first signal parameter; and adjusting a first operational parameter applicable to one or more of the plurality of VCOs to reduce mismatch between signals at the outputs of the plurality of VCOs with respect to a first signal parameter.

公开(公告)号：US09819349B2

公开(公告)日：2017-11-14

申请号：US15166894

申请日：2016-05-27

Applicant: Maxlinear Asia Singapore PTE LTD.

Inventor： Mark Hiebert ,  Srinivasa Rao Madala ,  Hormoz Djahanshahi

IPC: H03L7/07 ,  H03B5/12

CPC classification number: H03L7/07 ,  H03B5/1212 ,  H03B5/124 ,  H03B5/1256 ,  H03B2200/0076

Abstract: A method and system are provided for reducing mismatch between oscillators in an LC VCO array. In an implementation, a method comprises measuring the mismatch between the driver strengths, by measuring the corresponding oscillation amplitudes, and a mismatch between the resonance frequency of each LC VCO in the array of VCOs, and adjusting each LC VCO to reduce the measured amplitude and frequency mismatches. In an implementation, the measuring and adjusting is performed once to calibrate the array of VCOs. In another implementation, the system measures and adjusts the array of VCOs repeatedly. In another implementation, the LC VCO array has a master VCO and a plurality of slave VCOs connected to the master VCO by slave PLLs to reduce phase noise caused by mismatches.

公开(公告)号：US09647829B1

公开(公告)日：2017-05-09

申请号：US14690096

申请日：2015-04-17

Applicant: Maxlinear Asia Singapore PTE LTD.

Inventor： Mark Hiebert ,  Jay Chen

IPC: H04B1/38 ,  H04L5/16 ,  H04L7/02 ,  H04B1/40 ,  H04B7/0413

CPC classification number: H04L7/02 ,  H04B1/38 ,  H04B1/40 ,  H04B7/0413 ,  H04B7/0613 ,  H04B7/0837 ,  H04B17/20

Abstract: A transmit (TX) signal path circuit in a multiple-input, multiple-output (MIMO) transceiver responsive to a digital front end (DFE) for generating receive (RX) path phase alignment signals is disclosed. A digital up-conversion block uses a first numerically-controlled oscillator (NCO) for generating digital intermediate frequency (IF) signals for ordinary TX signal generation, and a different, second NCO for generating digital IF signals for RX phase alignment signal generation. An RF up-conversion block uses a TX local oscillator (LO) for generating analog RF signals for ordinary TX signal generation, and a different feedback (FB) LO for generating analog RF signals for RX phase alignment signal generation. Thus, phase alignment of the circuitry used for ordinary TX signal generation is left undisturbed by RX phase alignment signal generation.

公开(公告)号：US10270583B2

公开(公告)日：2019-04-23

申请号：US15964553

申请日：2018-04-27

Applicant: Maxlinear Asia Singapore PTE LTD

Inventor： Mark Hiebert ,  Jay Chen

IPC: H04B1/38 ,  H04L5/16 ,  H04L7/02 ,  H04B7/0413

Abstract: A transmit (TX) signal path circuit in a multiple-input, multiple-output (MIMO) transceiver responsive to a digital front end (DFE) for generating receive (RX) path phase alignment signals is disclosed. A digital up-conversion block uses a first numerically-controlled oscillator (NCO) for generating digital intermediate frequency (IF) signals for ordinary TX signal generation, and a different, second NCO for generating digital IF signals for RX phase alignment signal generation. An RF up-conversion block uses a TX local oscillator (LO) for generating analog RF signals for ordinary TX signal generation, and a different feedback (FB) LO for generating analog RF signals for RX phase alignment signal generation. Thus, phase alignment of the circuitry used for ordinary TX signal generation is left undisturbed by RX phase alignment signal generation.

公开(公告)号：US20180248679A1

公开(公告)日：2018-08-30

申请号：US15964553

申请日：2018-04-27

Applicant: Maxlinear Asia Singapore PTE LTD

Inventor： Mark Hiebert ,  Jay Chen

IPC: H04L7/02 ,  H04B1/38 ,  H04B7/0413

CPC classification number: H04L7/02 ,  H04B1/38 ,  H04B1/40 ,  H04B7/0413 ,  H04B7/0613 ,  H04B7/0837 ,  H04B17/20

Abstract: A transmit (TX) signal path circuit in a multiple-input, multiple-output (MIMO) transceiver responsive to a digital front end (DFE) for generating receive (RX) path phase alignment signals is disclosed. A digital up-conversion block uses a first numerically-controlled oscillator (NCO) for generating digital intermediate frequency (IF) signals for ordinary TX signal generation, and a different, second NCO for generating digital IF signals for RX phase alignment signal generation. An RF up-conversion block uses a TX local oscillator (LO) for generating analog RF signals for ordinary TX signal generation, and a different feedback (FB) LO for generating analog RF signals for RX phase alignment signal generation. Thus, phase alignment of the circuitry used for ordinary TX signal generation is left undisturbed by RX phase alignment signal generation.