Stack Transistors
Stack Transistor devices are used in the advanced node designs for reduced power consumption at lower gate lengths. Stack Transistor devices commonly used have the following features:
- The same master is used for creating different device variants, such as PMOS or NMOS.
- The Stack Transistor device has a series of cascaded PMOS or NMOS devices inside.
-
A parameter on the device Pcell master defines the device type used inside for stacking.
On the Device tab in the Power Manager Setup form, when you click 
after selecting the stackTransistor device type, the Device Parameter Names form opens.
When you click the stackMosfet device type, the Device Parameter Names form opens.
It is used to specify the device parameter names for the stack MOS device to define the device as PMOS or NMOS. You can specify more than one parameter names.
If the device terminal have names different from the conventional naming, you need to provide a terminal mapping for the same during device registration.
In a setup file, the stack MOS device registration is represented as shown below:
stackTransistor (
(nil “STACKMOS*" nil)
("analogLib" “STACKMOS*" nil)
("gpdk*" “STACKMOS*" nil)
)
stackTransistorDeviceParamNames "SourceCell"
Related Topics
Backtrace Enable Signals of Special Cells
Terminal Name Registration for Devices
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