August 2021

Model of the Month

Precharge-type phase-only detector

Check out how to model a precharge-type phase-only detector (PD), which is suitable for aligning two clocks with a zero phase offset in a DLL. This PD was first published by S. Sidiropoulos, et al. in 2000.

Tip of the Month

Dumping the waveforms of selected signals only

Learn the various options available for the dump primitive or $xmodel_dumpvars() command to dump just the waveforms of specific signals or signals contained in specific instances only.

Primitive of the Month

xbit_to_xreal_var

This primitive converts an xbit-type input to an xreal-type output, of which logic-1 and logic-0 levels can be varied with the level1 and level0 input signals.

XMODEL Release Updates

2021.08 Release

This release adds many improvements and bug fixes including the improved speed of the stline primitive and the --select option for the sparam_to_tline utility to support partial selection of ports.

Latest Issues

August 2024

Modeling PCIe Receiver Detection Circuit, Exporting XWAVE Analysis Results, and More

July 2024

Webinar on Silicon Photonics Modeling & Simulation, Modeling Nonlinear PAM4 Transmitters, and More

June 2024

XMODEL at DAC 2024, Modeling an Adaptive DFE Receiver, and More

May 2024

Modeling a Phase Interpolator with INL/DNL, Using PSL Assertions for Analog Checks, and More

April 2024

Modeling an Oscillator with Resettable Phase, Multiple Outputs, and Arbitrary Waveforms