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US 2002/0172159 A1Published application
Receiver-end supplementary circuit for boundary scan in data transmission with differential signals
OwnerWilhelm Koenig, Gerhard Zettlinventors
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Abstract
An input circuit which in the course of a boundary scan test makes an interruption in one or both signal feeds clearly detectable is proposed for integrated circuits with differential data inputs.
Claims11
An input circuit for the detection of an interruption in a differential signal feed, comprising:
- a pair of input terminals receiving differential data signals;
- and
- two inputs of a data comparator, connected to the input terminals, to generate data, wherein
- the two input terminals are connected to respective comparators,
- the comparators have an auxiliary voltage applied on the input side, and
- signals at outputs of the comparators are evaluated such that an interruption of at least one of the signal feeds is detected.
3 more elements
A method for detection of an interruption in a differential signal feed, comprising:
- feeding differential data signals to a pair of input terminals;
- and
- generating data at the pair of input terminals which are connected to two inputs of a data comparator, wherein
- the pair of input terminals are connected to a comparator,
- the comparators have an auxiliary voltage applied on the input side, and
- the signals at the outputs of the comparators are evaluated such that an interruption of at least one of the signal feeds is detected.
3 more elements
Dependencies are inferred from the claim text.