eldo_user

IBIS Models Support in Eldo
Buffers
(a_signal_pos) while the second one is taken to be the inverting input (a_signal_neg). The
differential input threshold is denoted by Vdiff and is provided under the [Diff Pin] keyword in
the IBIS file.
Figure 17-6. Pseudo-Differential Input Buffer Consisting of Two Single-Ended
Input Buffers
The digital output d_receive is given by:
d_receive =
• 1 V if a_signal_pos - a_signal_neg > V diff
• 0 V if a_signal_pos - a_signal_neg < V diff
The pseudo-differential output buffer consists of two single-ended output buffers as shown in
Figure 17-7. One single-ended buffer’s output is taken to be the non-inverting output
(a_signal_pos) while the second one is taken to be the inverting output (a_signal_neg). The
differential delay between the two outputs is denoted by tdelay and provided under the [Diff
Pin] keyword in the IBIS file.
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Eldo® User's Manual, 15.3