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公开(公告)号：US10727895B1
公开(公告)日：2020-07-28
申请号：US16585431
申请日：2019-09-27
Applicant: Apple Inc.
Inventor： Huy M. Nguyen , Cristian Gozzi , Huabo Chen , Xuchen Zhang , Yu Chang
Abstract: A transceiver circuit having a T-coil circuit, inductive termination, and an equalization circuit is disclosed. The transceiver includes a transmitter having an output coupled to a first node, and a receiver having an input coupled to the first node. A T-coil circuit is coupled between the first node and an input/output (I/O) node. The T-coil circuit includes first and second inductors coupled in series between the first node and the I/O node, the inductors being coupled at a second node. A termination circuit is coupled between the first node and a reference node, the termination circuit including a third inductor. The transceiver circuit also includes an equalization circuit configured to convey an equalization signal to the second node.
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公开(公告)号：US20190066777A1
公开(公告)日：2019-02-28
申请号：US15684594
申请日：2017-08-23
Applicant: Apple Inc.
Inventor： Huy M. Nguyen , Seong Hoon Lee
Abstract: Systems, apparatuses, and methods for generating a reference voltage are described. In various embodiments, an interface between a memory and a processor uses a reference voltage generator to generate a reference voltage for a single pin or a small group of pins. The generator generates a default reference voltage from a first tap in a resistor ladder, injects current with a current controller into a second tap of the resistor ladder when the generator receives an indication to generate a larger reference voltage, and draws current from a third tap of the resistor ladder when the generator receives an indication to generate a smaller reference voltage. The generator also generates a high threshold voltage independent of a low threshold voltage after calibration.
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公开(公告)号：US20250105870A1
公开(公告)日：2025-03-27
申请号：US18516182
申请日：2023-11-21
Applicant: Apple Inc.
Inventor： Yu Chang , Mitesh D. Katakwar , Huabo Chen , Huy M. Nguyen
Abstract: Circuits for reflection cancellation in single-ended signaling are disclosed. A transmission circuit includes a control circuit configured to receive a plurality of input signals that include a plurality of symbols having at least one bit and a data driver circuit configured to generate a particular signal on a transmission medium using a particular symbol of the plurality of symbols. The transmission circuit further includes a reflection cancellation circuit configured to, after a generation of the particular signal, generate a reflection cancellation signal on the transmission medium using an inverted value of a different symbol of the plurality of symbols received prior to the particular symbol. A first composite of the particular signal and the cancellation signal is readable at a load as a value of the particular symbol, wherein the load is configured to receive a transmitted signal via the transmission medium.
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Patent Agency Ranking
公开(公告)号：US10651979B1
公开(公告)日：2020-05-12
申请号：US16431482
申请日：2019-06-04
Applicant: Apple Inc.
Inventor： Mitesh D. Katakwar , Seong Hoon Lee , Huy M. Nguyen
Abstract: An apparatus includes first and second receiver circuits and a decision circuit. The first receiver circuit is configured to generate a first data symbol from a particular input data symbol of a plurality of input data symbols included in an input signal. The second receiver circuit is configured to generate a second data symbol from the particular input data symbol. The decision circuit is configured to select, using respective values of one or more previous output data symbols, either the first or second data symbol as a current output data symbol. In response to a change in value between successive input data symbols, the first and second receiver circuits are configured to generate the first and second data symbols with respective data valid windows with different durations.
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公开(公告)号：US10304530B2
公开(公告)日：2019-05-28
申请号：US15684594
申请日：2017-08-23
Applicant: Apple Inc.
Inventor： Huy M. Nguyen , Seong Hoon Lee
Abstract: Systems, apparatuses, and methods for generating a reference voltage are described. In various embodiments, an interface between a memory and a processor uses a reference voltage generator to generate a reference voltage for a single pin or a small group of pins. The generator generates a default reference voltage from a first tap in a resistor ladder, injects current with a current controller into a second tap of the resistor ladder when the generator receives an indication to generate a larger reference voltage, and draws current from a third tap of the resistor ladder when the generator receives an indication to generate a smaller reference voltage. The generator also generates a high threshold voltage independent of a low threshold voltage after calibration.
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公开(公告)号：US10277216B1
公开(公告)日：2019-04-30
申请号：US15717865
申请日：2017-09-27
Applicant: Apple Inc.
Inventor： Huy M. Nguyen , Seong Hoon Lee
Abstract: A method and apparatus for receiving reduced voltage swing signals is disclosed. A first amplifier may generate a first intermediate signal based on a difference between voltage levels of a first and second input signals, and a second amplifier may generate a second intermediate signal based on a difference in the voltage levels between the second and first input signals. A regenerative amplifier may increase a difference in the voltage level of the first and second intermediate signals using regenerative feedback and the voltage levels of the first and second input signals. A latch circuit may generate first and second output signals using the first and second intermediate signals.
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公开(公告)号：US20190326896A1
公开(公告)日：2019-10-24
申请号：US16397966
申请日：2019-04-29
Applicant: Apple Inc.
Inventor： Huy M. Nguyen , Seong Hoon Lee
Abstract: A method and apparatus for receiving reduced voltage swing signals is disclosed. A first amplifier may generate a first intermediate signal based on a difference between voltage levels of a first and second input signals, and a second amplifier may generate a second intermediate signal based on a difference in the voltage levels between the second and first input signals. A regenerative amplifier may increase a difference in the voltage level of the first and second intermediate signals using regenerative feedback and the voltage levels of the first and second input signals. A latch circuit may generate first and second output signals using the first and second intermediate signals.
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公开(公告)号：US10566963B2
公开(公告)日：2020-02-18
申请号：US16397966
申请日：2019-04-29
Applicant: Apple Inc.
Inventor： Huy M. Nguyen , Seong Hoon Lee
Abstract: A method and apparatus for receiving reduced voltage swing signals is disclosed. A first amplifier may generate a first intermediate signal based on a difference between voltage levels of a first and second input signals, and a second amplifier may generate a second intermediate signal based on a difference in the voltage levels between the second and first input signals. A regenerative amplifier may increase a difference in the voltage level of the first and second intermediate signals using regenerative feedback and the voltage levels of the first and second input signals. A latch circuit may generate first and second output signals using the first and second intermediate signals.
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