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公开(公告)号：US20170242946A1
公开(公告)日：2017-08-24
申请号：US15047002
申请日：2016-02-18
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen
IPC: G06F17/50
CPC classification number: G06F17/5036 , G06F17/5045 , G06F17/5068 , G06F17/5077
Abstract: A method of forming a mixed mode response from a single ended mode input includes modeling a first voltage controlled current source based on relative values of a vpositive input signal and a vnegative input signal and modeling a second voltage controlled current source based on relative values of the vpositive input signal and the vnegative input signal. A method of forming a single ended mode response from a mixed mode input modeling a first voltage controlled current source based on relative values of a vDIFFin input signal and a vCOMMin input signal and modeling a second voltage controlled current source based on relative values of the vDIFFin input signal and the vCOMMin input signal, the second voltage controlled being connected to ground through a second terminating impedance that is equal to the reference impedance (Z0).
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公开(公告)号：US09646925B2
公开(公告)日：2017-05-09
申请号：US14824125
申请日：2015-08-12
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen , Matteo Cocchini , Rohan U. Mandrekar , Tingdong Zhou
IPC: H01L23/498 , H01L23/528 , H04B3/32 , H01P3/02 , H01P3/08 , H05K1/02 , H04B1/00
CPC classification number: H01L23/49838 , H01L23/528 , H01L23/66 , H01L2223/6627 , H01P3/02 , H01P3/026 , H01P3/081 , H04B1/00 , H04B3/32 , H05K1/0216 , H05K1/0245
Abstract: An electronic device including a plurality of interconnects are orthogonally arranged in a grid pattern and evenly spaced by a first distance, the plurality of interconnects include: a first conductor pair with conductors arranged next to each other in a first direction, the first direction is oriented diagonally relative to the orthogonal grid pattern, a second conductor pair with conductors arranged next to each other in a second direction substantially perpendicular to the first direction, each conductor of the second conductor pair is spaced by the first distance from each signal conductor of the first conductor pair, and a third conductor pair with conductors arranged next to each other in a third direction substantially parallel to the first direction, each conductors of the third conductor pair is spaced by the first distance from one of the signal elements of the second conductor pair.
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公开(公告)号：US20170091363A1
公开(公告)日：2017-03-30
申请号：US15367276
申请日：2016-12-02
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen
IPC: G06F17/50
CPC classification number: G06F17/5036 , G06F17/504 , G06F17/5045 , G06F2217/36
Abstract: A method to generate a reduced delay twinaxial SPICE model is provided. The method may include measuring near-end S-parameter components and far-end S-parameter components of a twinaxial cable, reducing an original time delay of the far-end S-parameter components by multiplying each of the far-end S-parameter components by a complex exponential based on an equivalent delay length, a signal frequency, and an effective dielectric constant, simulating a signal transmitted across a twinaxial cable by running a 4-port SPICE model using the near-end S-parameter components and the multiplied far-end S-parameter components, and recording a magnitude and a phase of the transmitted signal with respect to frequency as outputs of the reduced delay twinaxial SPICE model.
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公开(公告)号：US20160149611A1
公开(公告)日：2016-05-26
申请号：US14824125
申请日：2015-08-12
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen , Matteo Cocchini , Rohan U. Mandrekar , Tingdong Zhou
IPC: H04B3/32
CPC classification number: H01L23/49838 , H01L23/528 , H01L23/66 , H01L2223/6627 , H01P3/02 , H01P3/026 , H01P3/081 , H04B1/00 , H04B3/32 , H05K1/0216 , H05K1/0245
Abstract: An electronic device including a plurality of interconnects are orthogonally arranged in a grid pattern and evenly spaced by a first distance, the plurality of interconnects include: a first conductor pair with conductors arranged next to each other in a first direction, the first direction is oriented diagonally relative to the orthogonal grid pattern, a second conductor pair with conductors arranged next to each other in a second direction substantially perpendicular to the first direction, each conductor of the second conductor pair is spaced by the first distance from each signal conductor of the first conductor pair, and a third conductor pair with conductors arranged next to each other in a third direction substantially parallel to the first direction, each conductors of the third conductor pair is spaced by the first distance from one of the signal elements of the second conductor pair.
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公开(公告)号：US11120189B2
公开(公告)日：2021-09-14
申请号：US15946805
申请日：2018-04-06
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen
IPC: G06F30/30 , G06F30/367 , G06F30/39 , G06F30/394
Abstract: A method of forming a mixed mode response from a single ended mode input includes modeling a first voltage controlled current source based on relative values of a vpositive input signal and a vnegative input signal and modeling a second voltage controlled current source based on relative values of the vpositive input signal and the vnegative input signal. A method of forming a single ended mode response from a mixed mode input modeling a first voltage controlled current source based on relative values of a vDIFFin input signal and a vCOMMin input signal and modeling a second voltage controlled current source based on relative values of the vDIFFin input signal and the vCOMMin input signal, the second voltage controlled being connected to ground through a second terminating impedance that is equal to the reference impedance (Z0).
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Patent Agency Ranking
26.发明申请公开(公告)号：US20180225401A1
公开(公告)日：2018-08-09
申请号：US15946805
申请日：2018-04-06
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen
IPC: G06F17/50
CPC classification number: G06F17/5036 , G06F17/5045 , G06F17/5068 , G06F17/5077
Abstract: A method of forming a mixed mode response from a single ended mode input includes modeling a first voltage controlled current source based on relative values of a vpositive input signal and a vnegative input signal and modeling a second voltage controlled current source based on relative values of the vpositive input signal and the vnegative input signal. A method of forming a single ended mode response from a mixed mode input modeling a first voltage controlled current source based on relative values of a vDIFFin input signal and a vCOMMin input signal and modeling a second voltage controlled current source based on relative values of the vDIFFin input signal and the vCOMMin input signal, the second voltage controlled being connected to ground through a second terminating impedance that is equal to the reference impedance (Z0).
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公开(公告)号：US09984189B2
公开(公告)日：2018-05-29
申请号：US15047152
申请日：2016-02-18
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen
IPC: G06F17/50
CPC classification number: G06F17/5036 , G06F2217/78 , G06F2217/84
Abstract: A method of analyzing a transient response of an electronic circuit is includes: forming a model of a retimer that includes a data clocked latch; providing a latch input signal at the input of the model; forming an output signal based on the latch input signal with the voltage controlled voltage source, wherein the voltage controlled voltage source provides a high output when the latch input signal passes through a low to high transition value and continues to provide the high output until the latch input signal passes through a high to low transition value.
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公开(公告)号：US20180113974A1
公开(公告)日：2018-04-26
申请号：US15299546
申请日：2016-10-21
Applicant: International Business Machines Corporation
Inventor： Dylan J. Boday , Zhaoqing Chen , Jose A. Hejase , Roger S. Krabbenhoft , Pavel Roy Paladhi , Junyan Tang
CPC classification number: G06F17/5077 , G06F17/5009 , G06F2217/06 , G06N3/084 , G06N7/005
Abstract: Mechanisms are provided for implementing a skew rate artificial neural network (ANN). The mechanisms generate a training dataset for training the skew rate ANN. The training dataset comprises a plurality of sets of data and each set of data corresponds to a particular set of printed circuit board (PCB) and communication channel characteristics. The mechanisms train the skew rate ANN based on the training dataset to generate a trained skew rate ANN. The mechanisms then receive an input dataset representing a set of PCB and communication channel characteristics for a PCB design. The trained skew rate ANN generates a predicted skew factor for the PCB design based on the input dataset. The predicted skew factor is then output to a PCB design tool to modify the PCB design based on the predicted skew factor.
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公开(公告)号：US09712315B1
公开(公告)日：2017-07-18
申请号：US15047143
申请日：2016-02-18
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen
CPC classification number: H04L7/0037 , G01R31/2848 , G06F17/5031 , G06F17/5036 , G06F2217/62 , G06F2217/84 , H04B1/0475
Abstract: A method of analyzing a transient response of an electronic circuit includes forming a model of a retimer and receiving an analyzing the output signal of the retimer. The model includes: a signal input circuit that receives an input signal; a clock input circuit that receives a reference clock signal; a slicer that samples a signal produced by the signal input circuit based on the reference clock signal; and an output signal circuit that forms an output signal from a sample taken by the slicer and that is based on the reference clock signal.
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公开(公告)号：US09703908B2
公开(公告)日：2017-07-11
申请号：US15367290
申请日：2016-12-02
Applicant: International Business Machines Corporation
Inventor： Zhaoqing Chen
CPC classification number: G06F17/5036 , G06F17/504 , G06F17/5045 , G06F2217/36
Abstract: A method to generate a reduced delay twinaxial SPICE model is provided. The method may include measuring near-end S-parameter components and far-end S-parameter components of a twinaxial cable, reducing an original time delay of the far-end S-parameter components by multiplying each of the far-end S-parameter components by a complex exponential based on an equivalent delay length, a signal frequency, and an effective dielectric constant, simulating a signal transmitted across a twinaxial cable by running a 4-port SPICE model using the near-end S-parameter components and the multiplied far-end S-parameter components, and recording a magnitude and a phase of the transmitted signal with respect to frequency as outputs of the reduced delay twinaxial SPICE model.
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