High-pass filter model

This is a behavioral first-order high-pass filter implemented in the Laplace (s-domain) using Verilog-A's laplace_nd function, so it is evaluated natively as a transfer function during AC analysis and as an equivalent time-domain filter during transient. The only tunable parameter is Cutoff_frequency — the −3 dB corner (default: 10 kHz) — making it trivial to drop into any testbench without sizing resistors or capacitors. Typical use-cases include AC-coupling a signal source to strip DC bias, representing the high-frequency pole of a feedback network, or serving as an ideal reference response when verifying the corner frequency of a real RC filter implementation.

This article contains Verilog-A model for a high-pass filter.

Usage:

1. Create a new cell in Library Manager named HPF and select cell type Verilog A;
2. Copy and paste the code provided;
3. Specify Cutoff_frequency variable to be -3dB frequency;
4. Perform Check and Save;
5. A cell symbol will be created;
6. Instantiate HPF cell into your design;
7. Perform Check and Save and run the simulation.

HPF model testbench

HPF model simulation result

Cell name: HPF

Model type: Verilog-A