Leaky integrator explained

In mathematics, a leaky integrator equation is a specific differential equation, used to describe a component or system that takes the integral of an input, but gradually leaks a small amount of input over time. It appears commonly in hydraulics, electronics, and neuroscience where it can represent either a single neuron or a local population of neurons.[1]

Equation

The equation is of the form

dx/dt=-Ax+C

where C is the input and A is the rate of the 'leak'.

General solution

The equation is a nonhomogeneous first-order linear differential equation. For constant C its solution is

x(t)=ke-At+

C
A

where

k

is a constant encoding the initial condition.

Notes and References

  1. Book: Eliasmith, Anderson, Chris, Charles. Neural Engineering. limited. 2003. MIT Press. Cambridge, Massachusetts. 81. 9780262050715 .