Cascode amplifier optimization
A cascode amplifier including a common-source device and a common-gate device formed utilizing different processing parameters to separately optimize performance of the common-source device and common-gate device.
1. A cascode amplifier including a common-source device and a common-gate device comprising doping profiles formed by performing ion implantation of a well of the common-source device with one or more of a different ionic species, a different dosage, a different energy, or a different tilt angle than a corresponding ion implantation of a well of the common-gate device.
2. The cascode amplifier of claim 1 wherein one of the common-source device and common-gate device has a gate oxide with a different thickness than a gate oxide of the other of the one of the common-source device and common-gate device.
3. The cascode amplifier of claim 1 wherein one of the common-source device and common-gate device has a gate oxide thickness proximate a drain of the one of the common-source device and common-gate device that is thicker than the gate oxide thickness proximate a source of the one of the common-source device and common-gate device the gate oxide having a flat lower surface extending across an entirety of the gate oxide and a tapered region extending across only a portion of the gate oxide.
4. The cascode amplifier of claim 1 having a doping profile on a source side of a well of one of the common-source device and common-gate device that is asymmetric with respect to a drain side of the well of the one of the common-source device and common-gate device.
5. The cascode amplifier of claim 1 wherein a doping profile of one of a source, a drain, or the well of the common-source device is different than a doping profile a corresponding one of a source, a drain, or well of the common-gate device.
6. A module for an electronic device including the cascode amplifier of claim 1 .
7. The electronic device including the module of claim 6 .
8. A radio frequency device including the module of claim 6 .
9. The cascode amplifier of claim 1 wherein one of the common-source device and common-gate device has a gate oxide having a flat lower surface extending across an entirety of the gate oxide, a first flat upper surface extending across only a first portion of the gate oxide, a second flat upper surface extending across only a second portion of the gate oxide, and a tapered region disposed between and extending from the first flat upper surface to the second flat upper surface.
10. The cascode amplifier of claim 1 wherein one of the common-source device and common-gate device has a tapered gate oxide and the other of the common-source device and common-gate device does not have a tapered gate oxide.
11. The cascode amplifier of claim 1 having a doping profile on a source side of a well of the common-source device that is asymmetric with respect to a drain side of the well of the common-source device.
12. The cascode amplifier of claim 1 wherein one of the common-source device and common-gate device includes a dopant that reduces a growth rate of silicon oxide relative to the growth rate of silicon oxide in the one of the common-source device and common-gate device absent the dopant.