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Fix well offset computation for PMOS

This commit is contained in:
mrg 2020-02-03 17:37:53 +00:00
parent 400cf0333a
commit 34c9b3a0a5
1 changed files with 14 additions and 15 deletions
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29
compiler/pgates/ptx.py
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@ -154,17 +154,19 @@ class ptx(design.design):
# Poly height must include poly extension over active
self.poly_height = self.tx_width + 2 * self.poly_extend_active
well_name = "{}well".format(self.well_type)
# The active offset is due to the well extension
if well_name in layer:
well_enclose_active = drc(well_name + "_enclose_active")
self.active_offset = vector([well_enclose_active] * 2)
else:
self.active_offset = vector(0, 0)
# but we need to do the active offset for the other tx type too
# so that they align in pgates.
well_enclose_active = 0
if self.well_type=="p" and "pwell" in layer:
well_enclose_active = max(drc("pwell_enclose_active"), well_enclose_active)
if self.well_type=="n" and "nwell" in layer:
well_enclose_active = max(drc("nwell_enclose_active"), well_enclose_active)
self.active_offset = vector([well_enclose_active] * 2)
# Well enclosure of active, ensure minwidth as well
well_name = "{}well".format(self.well_type)
if well_name in layer:
well_width_rule = drc("minwidth_" + well_name)
well_enclose_active = drc(well_name + "_enclose_active")
@ -179,7 +181,7 @@ class ptx(design.design):
# The well is not included in the height and width
self.height = self.poly_height
self.width = self.active_width
# This is the center of the first active contact offset (centered vertically)
self.contact_offset = self.active_offset + vector(0.5 * self.active_contact.width,
0.5 * self.active_height)
@ -334,13 +336,10 @@ class ptx(design.design):
if not (well_name in layer or "vtg" in layer):
return
center_pos = self.active_offset + vector(self.width / 2.0,
self.height / 2.0)
well_ll = center_pos - vector(self.well_width / 2.0,
self.well_height / 2.0)
well_ll = well_ll - vector(0,
self.poly_extend_active)
center_pos = self.active_offset + vector(0.5*self.active_width,
0.5*self.active_height)
well_ll = center_pos - vector(0.5*self.well_width,
0.5*self.well_height)
if well_name in layer:
self.add_rect(layer=well_name,
offset=well_ll,