This directory contains symbols to be used in the XSCHEM schematic editor. For a quick XSCHEM introduction see this presentation.
These symbols represent the available silicon devices as documented on the Skywater-pdk website in the device details
section.
Provide a set of symbols that can be used to draw circuit schematics in XSCHEM. Netlists in various target formats can be extracted for simulation or Layout vs Schematic checks. The set of symbols is designed to correctly link to the Skywater PDK model files, allowing to seamlessly simulate the circuit with SPICE simulators. A good tutorial for starting with xschem and Sky130 pdk can be found here. Thanks Bluecmd!
Up to now this is the list of devices that have been created. There are a lot of missing devices, as this is a work in progress and the whole PDK is evolving.
File name | Description |
---|---|
diode.sym | Diode used to describe various p-n junction between p-n wells and p-n diffusions |
lvsdiode.sym | Diodes used for LVS matching ? or for parasitic |
nfet_01v8_lvt.sym | 1.8V low threshold N-type Fet |
nfet_01v8.sym | 1.8V standard N-type Fet |
nfet_03v3_nvt.sym | 3.3V native threshold N-type Fet |
nfet_05v0_nvt.sym | 5V native threshold N-type Fet |
nfet_20v0.sym | 20V Vds, 5V Vgs N-type Fet |
nfet_20v0_zvt.sym | 20V Vds, 5V Vgs ‘Zero threshold’ N-type Fet |
nfet_20v0_iso.sym | 20V Vds, 5V Vgs N-type Fet in insulated p-well (uses deep nwell) |
nfet_20v0_nvt.sym | 20V Vds, 5V Vgs N-type Native Vth Fet in insulated p-well (uses deep nwell) |
nfet_g5v0d10v5.sym | 10.5V Vds, 5V Vgs N-type Fet |
nfet_g5v0d16v0.sym | 16V Vds, 5V Vgs N-type FET |
pfet_01v8_hvt.sym | 1.8V high threshold P-type Fet |
pfet_01v8_lvt.sym | 1.8V low threshold P-type Fet |
pfet_01v8.sym | 1.8V standard P-type Fet |
pfet_20v0.sym | 20V Vds, 5V Vgs P-type Fet |
pfet_g5v0d10v5.sym | 10.5V Vds, 5V Vgs P-type Fet |
pfet_g5v0d16v0.sym | 16V Vds, 5V Vgs P-type FET |
pnp_05v5.sym | 5V Vce PNP bipolar transistor |
res_generic_nd.sym | N diffusion generic resistor |
res_generic_pd.sym | P diffusion generic resistor |
res_generic_po.sym | Generic Poly resistor |
res_high_po_0p35.sym | High precision Poly resistor, 0.35um width |
res_high_po_0p69.sym | High precision Poly resistor, 0.69um width |
res_high_po_1p41.sym | High precision Poly resistor, 1.41um width |
res_high_po.sym | High precision Poly resistor, custom size |
res_iso_pw.sym | P-Well Poly resistor |
res_xhigh_po_0p35.sym | High precision High resistivity Poly resistor, 0.35um width |
res_xhigh_po_0p69.sym | High precision High resistivity Poly resistor, 0.69m width |
res_xhigh_po_1p41.sym | High precision High resistivity Poly resistor, 1.41um width |
res_xhigh_po.sym | High precision High resistivity Poly resistor, custom size |
cap_mim_m3_1.sym | Metal3 Insulator Metal4 (MIM) capacitor |
cap_mim_m3_2.sym | Metal4 Insulator Metal5 (MIM) capacitor |
vpp_cap.sym | Vertical parallel plate metal capacitors |
cap_var_lvt.sym | Variable capacitance (Varactor), LVT version |
cap_var_hvt.sym | Variable capacitance (Varactor), HVT version |
vpp_cap.sym | Vertical Parallel Plate (VPP) capacitors |
symbol image | symbol image | symbol image | symbol image |
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