Differential input receiver circuit testing with a loopback circuit

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12244331
APP PUB NO 20230033973A1
SERIAL NO

17813774

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Abstract

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A low voltage differential signaling (LVDS) receiver includes a receiver circuit including first and second inputs coupled to first and second conductive pads, respectively, and an output coupled to an input of a digital controller, and a dummy transmitter circuit including a first input coupled to receive a common mode voltage (VCM) tune signal, a second input coupled to a loopback input signal, a third input coupled to a loopback enable signal, a first output coupled to the first input of the receiver circuit, and a second output coupled to the second input of the receiver circuit. When a test mode of operation is enabled, the digital controller asserts the loopback enable signal, and the dummy transmitter circuit generates a pair of test differential signals based on the VCM tune signal, wherein the VCM tune signal varies to test the LVDS receiver over a range of common mode voltages.

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Patent Owner(s)

  • NXP USA, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Abhishek, Kumar Bee Cave, US 77 261
Benoist, Frederic Saint Paul de Vence, FR 5 28
Jagannathan, Srikanth Austin, US 28 73

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