Hi all, maybe its a basic question. I cannot understand different types of resistors in the skywater-pdk. So please let me know the usual/general resistor to be used.

Depends on the application. Typically, though, if it is for analog work, then you want a polysilicon resistor. The best ones to use are the

res_high_po

(320 ohms/square) and

res_xhigh_po

(2000 ohms/square). For smaller resistances, unmodified poly is 50 ohms/square. The

high

and

xhigh

versions come in 5 "approved" fixed widths, so for example, the high-resistance poly resistor at 0.69um wide has a device name

sky130_fd_pr__res_high_po_0p69

.

@Tim Edwards Thanks for the reply. I am working on CML_buffer which is an analog work. So, I will go with res_high_po.