eldo_user

Examples
Tutorial—High Impedance Fault Detection of a PLL Circuit
With the help of the EZwave Power Analysis tool, you have analyzed the power contribution
for MOS devices and then refined those for a specific time window, while observing the
instantaneous power at block level and device level.
Tip
See “.POWER_ANALYSIS” in the Eldo Reference Manual.
See “Analyzing Power Consumption” in the EZwave User’s and Reference Manual.
Tutorial—High Impedance Fault Detection of a
PLL Circuit
Netlist file: hiz/HiZ_PLL.cir
In this tutorial you will use the Eldo .HiZ commands to detect high impedance faults on a PLL
design and its components. You will gain familiarity with the HiZ configuration commands, the
impedance plots, and you will also use the AMS Results Browser to refine HiZ results.
The tutorial demonstrates how to detect “abnormal” high impedance values on the PLL input
control (see Figure 21-42 PLL input TPROG1), causing a PLL failure. You will then fix this
problem and use HiZ configurations to detect “expected” high impedance values on the Charge
Pump output (see Figure 21-42 PLL internal net INVCO).
Note
The PLL circuit in this tutorial is encrypted.
The following files are provided for this tutorial in the hiz directory:
• HiZ_PLL.cir — Main Eldo netlist file.
• PLL_UVM_SUBCKT.include.crypt — Encrypted subckt definitions.
• bsim46.corners.lib.crypt — Encrypted BSIM4 model file.
• dspc_cmos.lib.crypt — Encrypted subckt definitions.
• dspf_pll_v01.dspf — Parasitic information in DSPF for backannotation.
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Eldo® User's Manual, 15.3