Skip to content
Analog filter calculators and engineering calculations in the VlasovLab calculators section

Calculators

Analog filter calculators

Interactive calculation tools for analog filters, ADC input chains, EMI tasks and component selection. They are useful for preliminary engineering estimates, but the final schematic must still be checked against real values, tolerances, loads and device operating conditions.

Section contents

Available calculation tools

The groups below describe what this page covers. This static index stays readable for search engines and AI search even before the JavaScript calculator interface is executed.

RC filters

First-order and cascaded RC low-pass and high-pass calculations for quick analog signal-chain checks.

  • RC low-pass filter
  • RC high-pass filter
  • 2nd-order cascaded RC low-pass and high-pass filters
  • 3rd-order cascaded RC low-pass and high-pass filters

LC filters and ladders

Passive LC sections and third-order ladder filters with source/load impedance taken into account.

  • 2nd-order LC low-pass and high-pass filters
  • 3rd-order LC ladder low-pass filters, T and pi sections
  • 3rd-order LC ladder high-pass filters, T and pi sections

RLC and notch filters

Resonant circuits, band-pass and rejection filters for frequency-selective analog tasks.

  • Series and parallel RLC resonance
  • RLC band-pass filter
  • RLC notch filter
  • Twin-T notch filter

Active filters

Operational-amplifier filter topologies with practical component synthesis and response checks.

  • Sallen-Key 2nd-order Butterworth low-pass filter
  • Multiple-feedback 2nd-order low-pass filter

Power and EMI helpers

Calculations for power-supply input filtering, damping, peaking and attenuation estimates.

  • CLC/pi power and EMI low-pass filter
  • SMPS/EMI input-filter helper

ADC and component utilities

Auxiliary tools for measurement channels, ADC front ends and standard component values.

  • Anti-aliasing filter helper
  • ADC input settling helper
  • E12/E24 resistor combiner
  • E12/E24 capacitor combiner

Reference tools

External calculators and engineering utilities

For complex projects it is also useful to compare results with vendor tools and specialized RF or PCB calculators.

Contact

Need an engineering check or a calculation for a real device? Contact us

Contact us by email. We discuss custom electronics and automation tasks remotely with companies, labs, small businesses and individual customers worldwide.