# jonke_synapse – Synapse type for spike-timing dependent plasticity with additional additive factors.¶

## Description¶

jonke_synapse is a connector to create synapses with spike time
dependent plasticity. Unlike `stdp_synapse`

, we use the update equations:

where

and

This makes it possible to implement update rules which approximate the rule stated in [1], and for examples, the rules given in [2] and [3].

Warning

This synaptic plasticity rule does not take precise spike timing into account. When calculating the weight update, the precise spike time part of the timestamp is ignored.

## Parameters¶

lambda |
double |
Step size |

Wmax |
double |
Maximum allowed weight, note that this scales each weight update |

alpha |
double |
Determine shape of depression term |

mu_plus |
double |
Set weight dependency of facilitating update |

mu_minus |
double |
Set weight dependency of depressing update |

tau_plus |
double |
Time constant of STDP window, potentiation in ms |

beta |
double |
Set negative offset for both updates |

(tau_minus is defined in the postsynaptic neuron.)

## Transmits¶

SpikeEvent