Patent ID: 6918073

Claim:
An electronic circuit for enabling differential tests, comprising: a first differential receiver having first and second inputs and an output, wherein first input of the first differential receiver is connected to a first contact and to a first single ended receiver input and wherein second input of the first differential receiver is connected to a second contact and to a second single ended receiver input; a first switch having first and second data inputs, a control input, and an output, wherein first data input of first switch is connected to first single ended receiver output and wherein second data input of first switch is connected to first differential receiver output; a first control device having an output, wherein first control device output is connected to first switch control input and wherein when first control device output is in a specified condition, first data input of first switch is connected to first switch output, otherwise second data input of first switch is connected to first switch output; a third switch having first and second data connections and first control input, wherein the first data connection of the third switch is connectable to a first signal path and wherein the second data connection of the third switch is connected to a first driver output, the first input of the first differential receiver, and the first contact; and a fourth switch having first and second data connections and first control input, wherein the first data connection of the fourth switch is connectable to a second signal path and wherein the second data connection of the fourth switch is connected to a second driver output, the second data input of the first differential receiver, and the second contact.