At+t Corp.

At&t Bell Laboratories

Ikanos Communications, Inc.

Eduard Sackinger

Bernhard Boser

Arnold Muralt

Fenghua Zheng

Fred Larsen

An adaptive hybrid system is coupled to a loop for adjusting trans-hybrid loss. The system comprises a fixed portion comprising a first receiver transfer function block and a first hybrid transfer function block. The fixed portion is configured to receive a far-end signal and mitigate frequency dependent attenuation experienced by the far-end signal. The system also comprises a variable portion comprising a second receiver transfer function block and a second hybrid transfer function block configured to subtract a transmit echo from the received far-end signal.

Adaptive integrated hybrid with complex adaptation for digital subscriber line systems

An electronic synapse circuit is disclosed for multiplying an analog weight signal value by a digital state signal value to achieve a signed product value as a current which is capable of being summed with other such synapse circuit outputs. The circuit employs a storage multiplying digital-to-analog converter which provides storage for the analog weight signal value. Additional circuitry permits programming different analog weight signal values into the circuit, performing four-quadrant multiplication, generating a current summable output, and maintaining the stored analog weight signal value at a substantially constant value independent of the digital state signal values.

Electronic synapse circuit for artificial neural network

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Tinton Falls, NJ, United States of America

Eduard Sackinger