Specifications

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Page 77
安捷倫科技高頻元件量測研討會
Feb.23, 2006
IBIS Model
A basic IBIS model consists of
Four I-V curves: pullup & Power clamp, pulldown and Gnd
clamp
Two ramps (Rampup and Rampdown) and/or Two/Four Vt
tables
Die capacitance: C_comp
Packaging: RLC values
For each buffer on a chip
Ramp up (or
Vt table)
Ramp down
(or Vt table)
Pull up I-V
Pull down I-
V
Power clamp
I-V
GND clamp I-
V
input
I/O pin
Vcc
Gnd
Page 78
安捷倫科技高頻元件量測研討會
Feb.23, 2006
For one pair of V(t) waveform,
The other pair is created for a
different value of V-fixture.
Red- V(t) waveform
pair in IBIS data
Blue- Synthesized
V(t) waveform
pair in IBIS data