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LVS feature request: same device class, different extractors #411

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klayoutmatthias opened this issue Nov 17, 2019 · 1 comment
Closed

LVS feature request: same device class, different extractors #411

klayoutmatthias opened this issue Nov 17, 2019 · 1 comment
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@klayoutmatthias
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@klayoutmatthias klayoutmatthias commented Nov 17, 2019

Sometimes it's useful to have different device extractors producing the same device model with different algorithms.

This will also allow the device combination algorithm to join such devices.

Proposal: extractors using the same model name shall share the same model. Right now, it's not possible to give two extractors the same name.

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@klayoutmatthias klayoutmatthias commented Nov 17, 2019

2r.zip

To see the desired effect, the attached layout has two kind of devices (both "RES"). With this feature, we could use this extraction run:

rmarker = input(1, 0)
poly = input(2, 0)
diff = input(3, 0)
contact = input(4, 0)
metal = input(5, 0)

poly_cap = poly - rmarker
poly_res = poly & rmarker
diff_cap = diff - rmarker
diff_res = diff & rmarker

extract_devices(resistor("RES", 50), { "R" => poly_res, "C" => poly_cap })
extract_devices(resistor("RES", 150), { "R" => diff_res, "C" => diff_cap })

connect(poly_cap, contact)
connect(diff_cap, contact)
connect(contact, metal)

puts netlist.to_s

netlist.simplify

puts netlist.to_s

In the second netlist, the resistors should be combined serially.

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