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Schmitt Trigger calculator

Inverting Schmitt Trigger calculator

VBScript Calculator Index

These calculators are written in VBScript and will function in Internet Explorer and other browsers with VBScript plug-ins. Further information is available in About our calculators

A larger range of calculators is available in Java Script at Calculator Index

Characteristic Impedance Calculator for the Measurement of PCB Tracks and Coaxial Cables Using a Vector Network Analyser
An active calculator which computes Delay, Velocity Factor, Effective Dielectric Constant and Characteristic Impedance of a PCB track.

Circular Capacitor Calculator
Active calculator for a parallel plate, circular capacitor, showing the formula by Kirchhoff.

Microstrip Characteristic Impedance Calculator Using a Formula by Brian C Wadell
An active calculator based on a formula by Brian C. Wadell. Used for calculating the Zo of PCB transmission lines, showing the formula used.

Microstrip Characteristic Impedance Calculator
Active calculator using a formula from an article by Rick Hartley, showing the formula used.

Microstrip Characteristic Impedance Calculator Using The IPC-2141 Formula
Active calculator using a formula from an article by Polar instruments, showing the formula used.

PCB Sample Size Calculator for Relative Dielectric Constant Measurements
An active calculator which selects the optimum size for a circular plane on a PCB. This is used for making relative dielectric constant measurements using a Vector Network Analyser.

Pi Attenuator Calculator
Active calculator for resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a Pi attenuator.

Relative Dielectric Constant Calculator for a Circular Capacitor
Active calculator based on a formula by Kirchhoff for a circular capacitor, showing the equations used.

Resonance Calculator
Active calculator for a capacitor / inductor tank circuit, showing the formula used.

RF Trap With Attenuators
Active calculator with attenuation, return loss, reflection coefficient and VSWR . This calculator is specific to the circuit used in the RF Trap With Attenuators FLEXI-BOX.