Re: what is a RF transistor
The transistors for switching devices, if used in the core area, are usually smaller than the RF transistor. This is because the RF transistors are usually optimized for low noise, therefore the total width area is much larger in order to reduce the gate resistance. In this case the RF transistors usually has an interdigitated, multiple gate layout, while the switching transistor has a single gate. The switching transistor is usually operated close to it's peak Ft, while the RF transistor is operated much lower than peak Ft.