Advanced Micro Devices Corporation

Other

Dennis Lau

Yi Cheng

Boon-Aik Ang

Colin D Nayler

Bin Guo

Huei Meng Chang

Oikwan Tsang

Frank Y Ou

Hung Duy Vo

Zhen-Hua Liu

Phil Keller

Asynchronous communications between IoT (Internet of Things) devices on a network are disclosed. The asynchronous communications between IoT devices are facilitated by a centralized device on the communication network. For example, a first IoT device encrypts a message for a second IoT device. The first IoT device opens a temporary communication channel for the purpose of sending the message to the centralized device, after which the communication channel is closed. The second IoT device polls the centralized device by opening a temporary communication channel to retrieve the encrypted message, after which the communication channel is closed.

Secured asynchronous communication

A physical layer transceiver of a home network station connected to a telephone medium has an architecture enabling adaptation of detection circuitry based on received network signals to enable reliable recovery of data signals. The physical layer transceiver includes an input amplifier that amplifies network signals according to one of 128 gain settings set by a receiver gain control signal. A signal conditioning circuit includes an envelope detector configured for outputting an envelope of the amplified received signal, and an energy detector configured for outputting an energy signal of the amplified received signals. The envelope signal and the energy signal are supplied to slicer threshold circuits, configured for outputting noise, peak, data event and energy event signals based on noise threshold, peak threshold, data transition threshold, and energy threshold signals, respectively. A digital controller controls the input amplifier gain and the threshold values, and adjusts the gain and threshold values based on the noise event signal and the peak event signal within an access ID (AID) interval. Hence, the receiver can be optimized on a per-packet basis for receiving network signals by adjusting the receiver portion during the AID preamble phase of the data packet. Gain control may also be used by the digital controller on the transmitter portion to selectively adjust the output gain for optimizing transmission to a destination home network station.

Physical layer transceiver architecture for a home network station connected to a telephone line medium

An apparatus detects the loss of an asynchronous input signal and generates a reset signal that is synchronous to a system clock signal. The apparatus detects the loss of the input signal and generates a first output signal. The first output signal is delayed by a predetermined number of clock cycles, and a second output signal is generated to indicate a sustained loss of the input signal. A signal monitoring circuit is provided to confirm the loss of the input signal and generate a third output signal. The reset signal is generated only if the signal loss is both sustained and confirmed. Accordingly, the apparatus will not be unnecessarily reset as a result of noise that delays or accelerates the arrival of an edge of the asynchronous input signal. The apparatus may also be configured to monitor the loss of multiple asynchronous input signals in a multi-port channel by cascading a plurality of sub-circuits, each of which is configured to receive at least one input signal and independently generate a local reset signal. Hence, the apparatus is capable of performing a graceful recovery if any of the input signals are lost.

Signal monitoring circuit for detecting asynchronous clock loss

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Fremont, CA, United States of America

Dennis Lau