IBCM

models.Synapses.IBCM(self, eta=0.01, tau=2000.0)

Rate-coded synapse with Intrator & Cooper (1992) plasticity.

Parameters (global):

• eta = 0.01 : learning rate.

• tau = 2000.0 : time constant of the post-synaptic threshold.

Learning rule:

• theta : post-synaptic threshold:

tau * dtheta/dt + theta = post.r^2

• w : weight:

dw/dt = eta * post.r * (post.r - theta) * pre.r 

Equivalent code:

IBCM = ann.Synapse(
    parameters = """
        eta = 0.01 : projection
        tau = 2000.0 : projection
    """,
    equations = """
        tau * dtheta/dt + theta = post.r^2 : postsynaptic, exponential
        dw/dt = eta * post.r * (post.r - theta) * pre.r : min=0.0, explicit
    """
)