In cadence, there are many symbols are there which are given by the PDK...
Thereis no specific symbols or instances available in cadence...
You have to make your own symbol in the cadence virtuoso window..
First ,
1}Create the schematic as your design specification..
Then 2} give pin names for input output and powersupply (input/output). click 'P' for pin options. It is very impotant to specify the direction as INPUT, OUTPUT or INPUT/OUTPUT.
3} then in "create" -> Cell view -> from cell view
4}you have to specify your pins location... in the small window after clicking " FROM CELL VIEW"
5} A symbol editor window will open...
6}you can create shape and you must cover all the pins by the red box in the window..
7}Now you can use this symbol in your next circuit design..
All the best..
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