def add_utility_cell(cell,align_scale=[0.25,0.5,1],position=['top','left']):
align_mark=alignment_marks_4layers(scale=align_scale)
test_cell=resistivity_test_cell()
align_via=Device('Align_Via')
maskname_cell=mask_names()
align_via.add_array(
align_TE_on_via(),
rows=3,
columns=1,
spacing=(0,350))
align_via.flatten()
g=Group([align_via,align_mark,test_cell])
g.distribute(direction='x',spacing=100)
g.align(alignment='y')
g.move(origin=(g.center[0],g.ymax),
destination=(cell.center[0],cell.ymax-300))
maskname_cell.move(
origin=(maskname_cell.x,maskname_cell.ymin),
destination=(g.x,test_cell.ymax+150))
utility_cell=Device(name="UtilityCell")
if isinstance(position,str):
position=[position]
if 'top' in position:
utility_cell<<align_mark
utility_cell<<align_via
utility_cell<<test_cell
utility_cell<<maskname_cell
if 'left' in position:
t2=utility_cell<<align_mark
t3=utility_cell<<align_via
g=Group(t2,t3)
g.rotate(angle=90,center=(t2.xmin,t2.ymin))
g.move(origin=(t2.xmin,t2.center[1]),\
destination=(cell.xmin,cell.center[1]))
cell<<utility_cell
def draw(self):
''' Generates layout cell based on current parameters.
'top' and 'bottom' ports are included in the cell.
Returns
-------
cell : phidl.Device.
'''
unitcell = self._draw_unit_cell()
cell = Device(self.name)
cell.name = self.name
cell.add_array(unitcell,columns=self.n,rows=1,\
spacing=(self.pitch*2,0))
cell.flatten()
totx = self.pitch * (self.n * 2 + 1) - self.pitch * (1 - self.coverage)
midx = totx / 2
finger_dist=Point(self.pitch*1,\
self.length+self.y_offset)
cell = join(cell)
cell.name = self.name
cell.add_port(Port(name='bottom',\
midpoint=(self.origin+\
Point(midx,0)).coord,\
width=totx,
orientation=-90))
cell.add_port(Port(name='top',\
midpoint=(self.origin+\
Point(midx,self.length+self.y_offset)).coord,\
width=totx,
orientation=90))
del unitcell
return cell
