def _get_mos_ext_info_helper(self, num_cols: int, blk_h: int, row_type: MOSType, threshold: str
) -> ExtEndLayInfo:
sd_pitch = self.sd_pitch
cpo_h = self.mos_config['cpo_h']
mos_lay_table = self.tech_info.config['mos_lay_table']
cpo_lp = mos_lay_table['CPO']
po_lp = mos_lay_table['PO_DUMMY']
blk_w = num_cols * sd_pitch
cpo_h2 = cpo_h // 2
blk_rect = BBox(0, 0, blk_w, blk_h)
builder = LayoutInfoBuilder()
builder.add_rect_arr(cpo_lp, BBox(0, -cpo_h2, blk_w, cpo_h2))
builder.add_rect_arr(cpo_lp, BBox(0, blk_h - cpo_h2, blk_w, blk_h + cpo_h2))
self._add_fb(builder, blk_rect)
self._add_po_array(builder, po_lp, (0, blk_h), 0, num_cols)
for lay_purp in self._thres_imp_well_layers_iter(row_type, row_type, threshold):
builder.add_rect_arr(lay_purp, blk_rect)
edge_info = MOSEdgeInfo(blk_h=blk_h, row_type=row_type, mos_type=row_type,
threshold=threshold)
return ExtEndLayInfo(builder.get_info(blk_rect), edge_info)
def get_mos_end_info(self, blk_h: int, num_cols: int, einfo: RowExtInfo) -> ExtEndLayInfo:
sd_pitch = self.sd_pitch
cpo_h = self.mos_config['cpo_h']
mos_lay_table = self.tech_info.config['mos_lay_table']
cpo_lp = mos_lay_table['CPO']
cpo_h2 = cpo_h // 2
blk_w = num_cols * sd_pitch
blk_rect = BBox(0, 0, blk_w, blk_h)
builder = LayoutInfoBuilder()
builder.add_rect_arr(cpo_lp, BBox(0, blk_h - cpo_h2, blk_w, blk_h + cpo_h2))
edge_info = MOSEdgeInfo()
return ExtEndLayInfo(builder.get_info(blk_rect), edge_info)
def get_mos_row_edge_info(self, blk_w: int, rinfo: MOSRowInfo,
einfo: MOSEdgeInfo) -> LayoutInfo:
lch = self.lch
sd_pitch = self.sd_pitch
od_po_extx = self.od_po_extx
od_extx = od_po_extx - (sd_pitch - lch) // 2
mos_config = self.mos_config
imp_od_encx: int = mos_config['imp_od_encx']
mos_lay_table = self.tech_info.config['mos_lay_table']
row_type = rinfo.row_type
blk_h = rinfo.height
mos_type = einfo['mos_type']
has_od = einfo.get('has_od', False)
blk_rect = BBox(0, 0, blk_w, blk_h)
imp_rect = BBox(blk_w - imp_od_encx - od_extx, 0, blk_w, blk_h)
po_xl = blk_w - sd_pitch // 2 - lch // 2
builder = LayoutInfoBuilder()
if has_od:
po_lp = mos_lay_table['PO_PODE']
else:
po_lp = mos_lay_table['PO_DUMMY']
builder.add_rect_arr(po_lp, BBox(po_xl, 0, po_xl + lch, rinfo.height))
self._add_fb(builder, imp_rect)
if mos_type.is_substrate and mos_type is not row_type.sub_type:
row_type = mos_type
for lay_purp in self._thres_imp_well_layers_iter(
row_type, mos_type, rinfo.threshold):
builder.add_rect_arr(lay_purp, imp_rect)
return builder.get_info(blk_rect)
def get_mos_space_info(self, row_info: MOSRowInfo, num_cols: int, left_info: MOSEdgeInfo,
right_info: MOSEdgeInfo) -> MOSLayInfo:
lch = self.lch
sd_pitch = self.sd_pitch
od_po_extx = self.od_po_extx
if num_cols < self.min_sep_col and left_info and right_info:
# cannot draw less than min_sep_col between two devices
raise ODImplantEnclosureError(f'Cannot draw MOSSpace in {num_cols} columns.')
imp_od_encx: int = self.mos_config['imp_od_encx']
mos_lay_table = self.tech_info.config['mos_lay_table']
po_lp = mos_lay_table['PO_DUMMY']
pode_lp = mos_lay_table['PO_PODE']
blk_xr = num_cols * sd_pitch
blk_yt = row_info.height
bbox = BBox(0, 0, blk_xr, blk_yt)
row_type = row_info.row_type
threshold = row_info.threshold
builder = LayoutInfoBuilder()
po_y = (0, blk_yt)
od_extx = od_po_extx - (sd_pitch - lch) // 2
if left_info.get('has_od', False):
self._add_po_array(builder, pode_lp, po_y, 0, 1)
po_start = 1
imp_xmin = od_extx + imp_od_encx
else:
po_start = 0
imp_xmin = 0
if right_info.get('has_od', False):
self._add_po_array(builder, pode_lp, po_y, num_cols - 1, num_cols)
po_stop = num_cols - 1
imp_xmax = blk_xr - od_extx - imp_od_encx
else:
po_stop = num_cols
imp_xmax = blk_xr
self._add_po_array(builder, po_lp, (0, blk_yt), po_start, po_stop)
self._add_fb(builder, bbox)
if left_info:
typel = left_info['mos_type']
if right_info:
typer = right_info['mos_type']
else:
typer = typel
else:
if right_info:
typer = right_info['mos_type']
else:
typer = row_type
typel = typer
guard_ring = ((typel.is_substrate and typel is not row_type.sub_type) or
(typer.is_substrate and typer is not row_type.sub_type))
if typel == typer:
if guard_ring:
raise ValueError('Cannot have empty spaces between guard ring edges.')
blk_rect = BBox(0, 0, blk_xr, blk_yt)
for lay_purp in self._thres_imp_well_layers_iter(row_type, typel, threshold):
builder.add_rect_arr(lay_purp, blk_rect)
be = BlkExtInfo(row_type, threshold, False, ImmutableList([(num_cols, typel)]),
ImmutableSortedDict())
edgel = edger = MOSEdgeInfo(mos_type=typel, has_od=False, is_sub=False)
else:
# must be in transistor row, and has one substrate
if typel.is_substrate and ((not typer.is_substrate) or typel is not row_type.sub_type):
xmid = od_extx + imp_od_encx
else:
xmid = blk_xr - od_extx - imp_od_encx
if xmid < imp_xmin or xmid > imp_xmax:
raise ODImplantEnclosureError('Insufficient space to satisfy implant-OD '
'horizontal enclosure.')
rectl = BBox(0, 0, xmid, blk_yt)
rectr = BBox(xmid, 0, blk_xr, blk_yt)
for lay_purp in self._thres_imp_well_layers_iter(row_type, typel, threshold):
builder.add_rect_arr(lay_purp, rectl)
for lay_purp in self._thres_imp_well_layers_iter(row_type, typer, threshold):
builder.add_rect_arr(lay_purp, rectr)
fgl = xmid // sd_pitch
be = BlkExtInfo(row_type, threshold, guard_ring,
ImmutableList([(fgl, typel), (num_cols - fgl, typer)]),
ImmutableSortedDict())
edgel = MOSEdgeInfo(mos_type=typel, has_od=False, is_sub=False)
edger = MOSEdgeInfo(mos_type=typer, has_od=False, is_sub=False)
wire_info = (0, 0, 0)
return MOSLayInfo(builder.get_info(bbox), edgel, edger, be, be,
g_info=wire_info, d_info=wire_info, s_info=wire_info,
shorted_ports=ImmutableList())
def get_mos_tap_info(self, row_info: MOSRowInfo, conn_layer: int, seg: int,
options: Param) -> MOSLayInfo:
row_type = row_info.row_type
guard_ring: bool = options.get('guard_ring', row_info.guard_ring)
if guard_ring:
sub_type: MOSType = options.get('sub_type', row_type.sub_type)
else:
sub_type: MOSType = row_type.sub_type
lch = self.lch
sd_pitch = self.sd_pitch
mp_h: int = self.mos_config['mp_h']
mp_po_extx: int = self.mos_config['mp_po_extx']
md_w: int = self.mos_config['md_w']
mos_lay_table = self.tech_info.config['mos_lay_table']
mp_lp = mos_lay_table['MP']
g_info = self.get_conn_info(1, True)
d_info = self.get_conn_info(1, False)
threshold = row_info.threshold
ds_yt = row_info.ds_conn_y[1]
mp_yb, mp_yt = row_info['mp_y']
md_yb, md_yt = row_info['md_y']
md_yc = (md_yt + md_yb) // 2
ds_yb = md_yc - (ds_yt - md_yc)
fg = seg
num_wire = seg + 1
num_po = num_wire + 1
builder = LayoutInfoBuilder()
bbox = self._get_mos_active_rect_list(builder, row_info, fg, row_info.sub_width, sub_type)
# Connect gate to MP
mp_yc = (mp_yb + mp_yt) // 2
mp_delta = (sd_pitch + lch) // 2 + mp_po_extx
if num_po & 1:
num_vg = num_po // 2
if num_vg & 1:
# we have 3 PO left over in the middle
num_vg2 = (num_vg - 1) // 2
num_vgm = 2
else:
# we have 5 PO left over in the middle
num_vg2 = (num_vg - 2) // 2
num_vgm = 4
# draw middle vg
vgm_x = bbox.xm - ((num_vgm - 1) * sd_pitch) // 2
mp_xl = vgm_x - mp_delta
mp_xr = vgm_x + (num_vgm - 1) * sd_pitch + mp_delta
builder.add_rect_arr(mp_lp, BBox(mp_xl, mp_yb, mp_xr, mp_yt))
builder.add_via(g_info.get_via_info('M1_LiPo', vgm_x, mp_yc, mp_h,
nx=num_vgm, spx=sd_pitch))
# draw left/right vg
if num_vg2 > 0:
vg_pitch = 2 * sd_pitch
def _add_vg_half(vg_x: int) -> None:
xl = vg_x - mp_delta
xr = vg_x + mp_delta
builder.add_rect_arr(mp_lp, BBox(xl, mp_yb, xr, mp_yt),
nx=num_vg2, spx=vg_pitch)
builder.add_via(g_info.get_via_info('M1_LiPo', vg_x, mp_yc, mp_h,
nx=num_vg2, spx=vg_pitch))
_add_vg_half(0)
_add_vg_half((num_wire - 1) * sd_pitch - (num_vg2 - 1) * vg_pitch)
else:
# even number of PO, can connect pair-wise
num_vg = num_po // 2
vg_pitch = 2 * sd_pitch
builder.add_rect_arr(mp_lp, BBox(-mp_delta, mp_yb, mp_delta, mp_yt),
nx=num_vg, spx=vg_pitch)
builder.add_via(g_info.get_via_info('M1_LiPo', 0, mp_yc, mp_h,
nx=num_vg, spx=vg_pitch))
# connect drain/source to M1
m1_yc = (md_yb + md_yt) // 2
via_pitch = d_info.via_h + d_info.via_sp
vnum_bot = (md_yt - md_yb - d_info.via_bot_enc * 2 + d_info.via_sp) // via_pitch
vnum_top = (ds_yt - ds_yb - d_info.via_top_enc * 2 + d_info.via_sp) // via_pitch
vnum = min(vnum_top, vnum_bot)
builder.add_via(d_info.get_via_info('M1_LiAct', 0, m1_yc, md_w, ortho=False,
num=vnum, nx=num_wire, spx=sd_pitch))
edge_info = MOSEdgeInfo(mos_type=sub_type, has_od=True, is_sub=True)
be = BlkExtInfo(row_type, threshold, guard_ring, ImmutableList([(fg, sub_type)]),
ImmutableSortedDict())
wire_info = (0, num_wire, sd_pitch)
return MOSLayInfo(builder.get_info(bbox), edge_info, edge_info, be, be,
g_info=wire_info, d_info=wire_info, s_info=wire_info,
shorted_ports=ImmutableList())
def get_mos_conn_info(self, row_info: MOSRowInfo, conn_layer: int, seg: int, w: int, stack: int,
g_on_s: bool, options: Param) -> MOSLayInfo:
assert conn_layer == 1, 'currently only work for conn_layer = 1'
lch = self.lch
sd_pitch = self.sd_pitch
mp_h: int = self.mos_config['mp_h']
mp_po_extx: int = self.mos_config['mp_po_extx']
md_w: int = self.mos_config['md_w']
mos_lay_table = self.tech_info.config['mos_lay_table']
mp_lp = mos_lay_table['MP']
g_info = self.get_conn_info(1, True)
d_info = self.get_conn_info(1, False)
export_mid = options.get('export_mid', False)
export_mid = export_mid and stack == 2
row_type = row_info.row_type
ds_yb, ds_yt = row_info.ds_conn_y
threshold = row_info.threshold
mp_yb, mp_yt = row_info['mp_y']
md_yb, md_yt = row_info['md_y']
fg = seg * stack
wire_pitch = stack * sd_pitch
conn_pitch = 2 * wire_pitch
num_s = seg // 2 + 1
num_d = (seg + 1) // 2
s_xc = 0
d_xc = wire_pitch
if g_on_s:
num_g = fg // 2 + 1
g_xc = 0
else:
num_g = (fg + 1) // 2
g_xc = sd_pitch
g_pitch = 2 * sd_pitch
builder = LayoutInfoBuilder()
bbox = self._get_mos_active_rect_list(builder, row_info, fg, w, row_info.row_type)
# Connect gate to MP
mp_po_dx = (sd_pitch + lch) // 2 + mp_po_extx
builder.add_rect_arr(mp_lp, BBox(g_xc - mp_po_dx, mp_yb, g_xc + mp_po_dx, mp_yt),
nx=num_g, spx=g_pitch)
# connect gate to M1.
mp_yc = (mp_yb + mp_yt) // 2
builder.add_via(g_info.get_via_info('M1_LiPo', g_xc, mp_yc, mp_h,
nx=num_g, spx=g_pitch))
# connect drain/source to M1
m1_yc = (md_yb + md_yt) // 2
via_pitch = d_info.via_h + d_info.via_sp
vnum1 = (md_yt - md_yb - d_info.via_bot_enc * 2 + d_info.via_sp) // via_pitch
vnum2 = (ds_yt - ds_yb - d_info.via_top_enc * 2 + d_info.via_sp) // via_pitch
vnum = min(vnum1, vnum2)
builder.add_via(d_info.get_via_info('M1_LiAct', d_xc, m1_yc, md_w, ortho=False,
num=vnum, nx=num_d, spx=conn_pitch))
builder.add_via(d_info.get_via_info('M1_LiAct', s_xc, m1_yc, md_w, ortho=False,
num=vnum, nx=num_s, spx=conn_pitch))
if export_mid:
m_xc = sd_pitch
num_m = fg + 1 - num_s - num_d
m_info = (m_xc, num_m, wire_pitch)
builder.add_via(d_info.get_via_info('M1_LiAct', m_xc, m1_yc, md_w, ortho=False,
num=vnum, nx=num_m, spx=wire_pitch))
else:
m_info = None
edge_info = MOSEdgeInfo(mos_type=row_type, has_od=True, is_sub=False)
be = BlkExtInfo(row_type, threshold, False, ImmutableList([(fg, row_type)]),
ImmutableSortedDict())
return MOSLayInfo(builder.get_info(bbox), edge_info, edge_info, be, be,
g_info=(g_xc, num_g, g_pitch), d_info=(d_xc, num_d, conn_pitch),
s_info=(s_xc, num_s, conn_pitch), m_info=m_info,
shorted_ports=ImmutableList([MOSPortType.G]))