Spice Models For N2838A And N2836A Probe Head - Keysight N2800A User Manual

8
SPICE Models

SPICE Models for N2838A and N2836A Probe Head

These are SPICE models for the input impedances of the various InfiniiMax III probes.
Generic SPICE sub-circuit files are listed so they can be copied and pasted into user's
SPICE simulations.
Chapter
impedance and these modeled input impedances for the various probe heads.
The following diagram shows the SPICE circuit used for these probe heads:
•
•
Figure 74 SPICE circuit to use for N2838A and N2836A probe heads
The input impedance is only a function of the probe head; the amplifier input does not
significantly affect the input impedance.
136
7, "Performance Plots" shows the matching between the measured input
N2838A 25 GHz PC Board ZIF Tip (with N5439A ZIF Probe Head)
N2836A 26 GHz Solder-In Probe Head
InfiniiMax III Series Probes User's Guide