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Remove unused contact in pnand2

This commit is contained in:
mrg 2020-03-23 11:46:21 -07:00
parent f21791a904
commit 0ee6963198
1 changed files with 23 additions and 13 deletions
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36
compiler/pgates/pnand2.py
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@ -66,13 +66,23 @@ class pnand2(pgate.pgate):
def add_ptx(self):
""" Create the PMOS and NMOS transistors. """
self.nmos = factory.create(module_type="ptx",
width=self.nmos_width,
mults=self.tx_mults,
tx_type="nmos",
connect_poly=True,
connect_active=True)
self.add_mod(self.nmos)
self.nmos_nd = factory.create(module_type="ptx",
width=self.nmos_width,
mults=self.tx_mults,
tx_type="nmos",
add_drain_contact=False,
connect_poly=True,
connect_active=True)
self.add_mod(self.nmos_nd)
self.nmos_ns = factory.create(module_type="ptx",
width=self.nmos_width,
mults=self.tx_mults,
tx_type="nmos",
add_source_contact=False,
connect_poly=True,
connect_active=True)
self.add_mod(self.nmos_ns)
self.pmos = factory.create(module_type="ptx",
width=self.pmos_width,
@ -99,9 +109,9 @@ class pnand2(pgate.pgate):
# This is the extra space needed to ensure DRC rules
# to the active contacts
extra_contact_space = max(-self.nmos.get_pin("D").by(), 0)
extra_contact_space = max(-self.nmos_nd.get_pin("D").by(), 0)
# This is a poly-to-poly of a flipped cell
self.top_bottom_space = max(0.5 * self.m1_width + self.m1_space + extra_contact_space,
self.top_bottom_space = max(0.5 * self.m1_width + self.m1_space + extra_contact_space,
self.poly_extend_active + self.poly_space)
def route_supply_rails(self):
@ -130,11 +140,11 @@ class pnand2(pgate.pgate):
self.connect_inst(["Z", "B", "vdd", "vdd"])
self.nmos1_inst = self.add_inst(name="pnand2_nmos1",
mod=self.nmos)
mod=self.nmos_nd)
self.connect_inst(["Z", "B", "net1", "gnd"])
self.nmos2_inst = self.add_inst(name="pnand2_nmos2",
mod=self.nmos)
mod=self.nmos_ns)
self.connect_inst(["net1", "A", "gnd", "gnd"])
def place_ptx(self):
@ -160,7 +170,7 @@ class pnand2(pgate.pgate):
# Output position will be in between the PMOS and NMOS
self.output_pos = vector(0,
0.5 * (pmos1_pos.y + nmos1_pos.y + self.nmos.active_height))
0.5 * (pmos1_pos.y + nmos1_pos.y + self.nmos_nd.active_height))
def add_well_contacts(self):
"""
@ -169,7 +179,7 @@ class pnand2(pgate.pgate):
"""
self.add_nwell_contact(self.pmos, self.pmos2_pos)
self.add_pwell_contact(self.nmos, self.nmos2_pos)
self.add_pwell_contact(self.nmos_nd, self.nmos2_pos)
def connect_rails(self):
""" Connect the nmos and pmos to its respective power rails """