EModel

The emodel statement inside a pcb-component associates the component with an electrical model.

Syntax

; define a pcb-component with a resistor EModel
pcb-component my-resisor: 
  emodel = Resistor(resistance-ohms, tolerance-%, max-power-watts)

Description

An emodel is a simplified model of electrical properties. More complete simulation models can be defined with spice statements (coming soon).

Introspection Command

The emodel? query command returns the electrical model of an instance or a component. The function returns false if there is no electrical model or the argument is not a single component instance.

Different types of EModel's:

; define a resistor EModel
  emodel = Resistor(resistance-ohms, tolerance-%, max-power-watts)

; define a capacitor EModel
  emodel = Capacitor(capacitance-farads,
                     tolerance-%,
                     max-voltage-volts,
                     polarized?, ; optional boolean
                     low-esr?,   ; optional boolean
                     temperature-coefficient?, ; optional string, eg "X7R" or "X5R"
                     dielectric? ; optional)   ; optional string, eg "Ceramic, "Tantalum", "Electrolytic"

; define an inductor EModel
  emodel = Inductor(inductance-microhenries, tolerance-%, max-current-amps)

; define a diode EModel
  emodel Diode(forward-current-amps, 
               forward-voltage-volts, 
               max-current-amps, 
               max-reverse-voltage-volts,
               color?, ; optional, for LEDs
               luminous-intensity-millicandelas) ; optional, for LEDs

Example Code:

pcb-component cap-component :
  emodel = Capacitor(1.0e-007)
pcb-module my-design :
  inst cap : cap-component
  inst cap-array : cap-component[3]

  println("emodel of cap is %_" % [emodel?(cap)])
  println("emodel of cap-array[0] is %_" % [emodel?(cap-array[0])])
  println("emodel of cap-component is %_" % [emodel?(cap-component)])

The emodel? query returns Capacitor(1.0e-007) for all three calls. The output is

emodel of cap is Capacitor(1.0e-007)
emodel of cap-array[0] is Capacitor(1.0e-007)
emodel of cap-component is Capacitor(1.0e-007)