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fets

Fet

Bases: Leaf

Transistor cell

d: Drain g: Gate s: Source b: Bulk w (Optional[str]): width l (Optional[str]): length

Source code in circuitbrew/fets.py 
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class Fet(Leaf):
    """ Transistor cell

            d: Drain
            g: Gate
            s: Source
            b: Bulk
            w (Optional[str]): width
            l (Optional[str]): length

    """
    d = Port()
    g = InputPort()
    s = Port()
    b = Port()


    def get_instance_spice(self, scope):
        connected = ' '.join(self._get_instance_ports(scope))
        # Use the parent module's fet_count for the id
        cnt = scope.instance.fet_count[self.__class__]
        #s = f'xm{self.inst_prefix}{self._id} {connected} {self.fet_type} {self.width_id}={self.w} l={self.l}'
        s = f'xm{self.inst_prefix}{cnt} {connected} {self.fet_type} {self.width_id}={self.w} l={self.l}'
        scope.instance.fet_count.update([self.__class__])
        return s

Nfet

Bases: Fet

Nfet

Source code in circuitbrew/fets.py 
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class Nfet(Fet):
    """Nfet
    """

    inst_prefix = 'n'

    def post_init(self):
        self.fet_type = getattr(self, self.vt)

    def connect_power(self, p: SupplyPort):
        """ Called when creating stacks (production rules) to make sure
            the bulk is connected to gnd.
        """
        p.gnd = self.b

connect_power(p)

Called when creating stacks (production rules) to make sure the bulk is connected to gnd.

Source code in circuitbrew/fets.py 
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def connect_power(self, p: SupplyPort):
    """ Called when creating stacks (production rules) to make sure
        the bulk is connected to gnd.
    """
    p.gnd = self.b

Pfet

Bases: Fet

Pfet

Source code in circuitbrew/fets.py 
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class Pfet(Fet):
    """Pfet

    """

    inst_prefix = 'p'

    def post_init(self):
        self.fet_type = getattr(self, self.vt)

    def connect_power(self, p:SupplyPort):
        """ Called when creating stacks (production rules) to make sure
            the bulk is connected to vdd.
        """
        p.vdd = self.b

connect_power(p)

Called when creating stacks (production rules) to make sure the bulk is connected to vdd.

Source code in circuitbrew/fets.py 
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def connect_power(self, p:SupplyPort):
    """ Called when creating stacks (production rules) to make sure
        the bulk is connected to vdd.
    """
    p.vdd = self.b