Standardised current sources¶
Standard current sources are current sources models that are available in at least two of the simulation engines supported by PyNN. PyNN performs automatic translation of parameter names, types and units. Only a handful of models are currently available, but the list will be expanded in future releases.
Current Sources¶
DCSource¶
Source producing a single pulse of current of constant amplitude.
Availability: NEST, NEURON, Brian
| Name | Default value | Units | Description |
|---|---|---|---|
| amplitude | 1.0 | nA | pulse amplitude in nA |
| start | 0 | ms | onset time of pulse in ms |
| stop | 1000000.0 | ms | end of pulse in ms |
StepCurrentSource¶
A step-wise time-varying current source.
Availability: NEST, NEURON, Brian
| Name | Default value | Units | Description |
|---|---|---|---|
| amplitudes | [] | nA | list/array of times at which the injected current changes. |
| times | [] | ms | list/array of times at which the injected current changes. |
ACSource¶
A sine wave modulated current source
Availability: NEST, NEURON, Brian
| Name | Default value | Units | Description |
|---|---|---|---|
| amplitude | 1.0 | nA | pulse amplitude in nA |
| start | 0 | ms | onset time of pulse in ms |
| stop | 1000000.0 | ms | end of pulse in ms |
| frequency | 10.0 | Hz | frequency of the oscillation |
| phase | 0 | deg | phase in degree |
| offset | 0 | nA | offset of the oscillation in nA |
NoisyCurrentSource¶
A Gaussian “white” noise current source. The current amplitude changes at fixed intervals, with the new value drawn from a Gaussian distribution.
Availability: NEST, NEURON, Brian
| Name | Default value | Units | Description |
|---|---|---|---|
| mean | 0.0 | nA | mean value of the noise |
| stdev | 1.0 | nA | standard deviation of the noise |
| start | 0 | ms | onset time of pulse in ms |
| stop | 1000000.0 | ms | end of pulse in ms |
| dt | 0.1 | ms | interval between updates of the current |
