iaf.xml

<Lems>
   <ComponentType name="refractiaf">          
      <Parameter name="threshold" dimension="voltage" />          
      <Parameter name="refractoryPeriod" dimension="time" />          
      <Parameter name="capacitance" dimension="capacitance" />          
      <Parameter name="vleak" dimension="voltage" />          
      <Parameter name="gleak" dimension="conductance" />          
      <Parameter name="current" dimension="current" />          
      <Parameter name="vreset" dimension="voltage" />          
      <Parameter name="deltaV" dimension="voltage" />          
      <Parameter name="v0" dimension="voltage" />          
      <EventPort name="out" direction="out" />          
      <EventPort name="in" direction="in" />          
      <Exposure name="v" dimension="voltage" />          
      <Dynamics>              
         <StateVariable name="v" exposure="v" dimension="voltage" />                 
         <StateVariable name="tin" dimension="time" />              
         <OnStart>                  
            <StateAssignment variable="v" value="v0" />              
         </OnStart>              
         <Regime name="refr">                  
            <OnEntry>                      
               <StateAssignment variable="tin" value="t" />                      
               <StateAssignment variable="v" value="vreset" />                  
            </OnEntry>                  
            <OnCondition test="t .gt. tin + refractoryPeriod">                      
               <Transition regime="int" />                  
            </OnCondition>              
         </Regime>              
         <Regime name="int" initial="true">                  
            <TimeDerivative variable="v" value="(current + gleak * (vleak - v)) / capacitance" />                  
            <OnCondition test="v .gt. threshold">                      
               <EventOut port="out" />                      
               <Transition regime="refr" />                  
            </OnCondition>              
         </Regime>          
      </Dynamics>      
   </ComponentType>
   <refractiaf threshold="-40mV" refractoryPeriod="5ms" capacitance="1nF" vleak="-80mV" gleak="100pS" vreset="-70mV" v0="-70mV" deltaV="10mV" />
</Lems>


<!-- from brian2 import *

n = 1000
duration = 1*second
tau = 10*ms
eqs = '''
dv/dt = (v0 - v) / tau : volt (unless refractory)
v0 : volt
'''
group = NeuronGroup(n, eqs, threshold='v > -40*mV', reset='v = -70*mV',
                    refractory=5*ms)
group.v = 0*mV
group.v0 = '20*mV * i / (n-1)'

monitor = SpikeMonitor(group)

run(duration)
plot(group.v0/mV, monitor.count / duration)
xlabel('v0 (mV)')
ylabel('Firing rate (sp/s)')
show() -->