An exemplary cascode amplifier circuit comprises a first intrinsic FET, a second intrinsic FET, a third intrinsic FET, and a fourth FET. First and second planarization stop layers are provided on the pole layer. The invention also includes plants having at least one cell expressing the modified DFR. , identity purposes by querying a database for data related to an identified person, comparing the data with a plurality of content, and, in response to a determination that the data matches at least one piece of the plurality of content, display the plurality of content specific to the person on a display device. In one embodiment the ultrasound system supports \xbd crystal physical resolution and \xbc crystal digital resolution. The spacers are attached to the sidewalls of the stacked gate structure.