decayFilter(a,decayRate)

Implements a filter whose response is based on a given decay rate.

Syntax

o_decayFilter(a,decayRate): a: waveform - input waveform; decayRate: numeric - decay rate in percentage per sample; return: waveform- input transformed by the decay-based filter

Usage

Typical usage is to model a diode-RC detector, but can be used in any case where the output signal is a decayed version of the input signal.

Location

menu: veeos ==> Signal processing ==> Modules ==> decayFilter

library: sigLib

Example

Notes

A very basic nonlinear filter can be implemented with a diode and a capacitor. The capacitor provides charge storage (i.e. memory) and the diode provides charges to the capacitor in one direction only (i.e. charges cap but doesn't discharge it). This provides a non-linear filter such that it follows a rising input but the output decays at a specified rate(so-called slew rate). A typical use for this is for recovering an envelope from an AM-modulated signal.

Reference

Dependencies

Supported On

VEE 7.0+, all platforms