eldo_user

IBIS Models Support in Eldo
Buffers
Single-Ended Buffers
A number of single-ended buffer types are supported.
Input and Input_ECL buffers
Figure 17-1 shows the model of an Input buffer (receiver). It has two sets of I-V curves, a
ground clamp and a power clamp, and the die capacitance C_comp. Two thresholds are defined,
Vinl and Vinh, that determine the buffer’s digital output, d_receive.
Figure 17-1. Input Buffer Model Building Blocks
The following relation gives the digital output for the non-inverting buffers:
Vd_receive =
1.0 V if Va_signal > Vinh
0.5 V if Vinl < Va_signal < Vinh
0.0 V if Va_signal < Vinh
Eldo® User's Manual, 15.3 735