Built in self test

Details Built in self test Built in self test

2005-06-13

2009-12-29

Ferris, Derrick W (Department: 2416)

Multiplex communications

Diagnostic testing

Loopback

Reexamination Certificate

active

07639626

ABSTRACT:
There is provided a method for Loss of Signal Built In Self Test, and corresponding apparatus comprising: a loopback driver for receiving test signals, and for directing the test signals to at least one of a first output of the loopback driver and a second output of the loopback driver; a Digital to Analogue Converter DAC connected to the loopback driver for controlling the amplitude of the data input signals transmitted by the loopback driver; and coupling means for directing the scaled signals to a Loss of Signal detector. Also provided is a method for testing the hysteresis thresholds of an ACJTAG module, and corresponding apparatus comprising a loopback driver for receiving data test signals, and for directing the test signals to at least one of a first output of the loopback driver and a second output of the loopback driver; a Digital to Analogue Converter DAC connected to the loopback driver for controlling the amplitude of the data input signals transmitted by the loopback driver; and coupling means for directing the scaled signals to the ACJTAG block.

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patent: 7254169 (2007-08-01), Steiner et al.
patent: 7269772 (2007-09-01), Li et al.
patent: 2003/0046624 (2003-03-01), Muhtaroglu

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