Harmonic distortion analysis of double gate graded-channel MOSFETs operating in saturation

In this work we present an analysis of harmonic distortion (HD) in graded-channel (GC) gate-all-a round (GAA) devices operating in saturation region for analog applications. The study has been performed through device characterization and two-dimensional process and device simulations. The overall study has been done on the total and third order HDs. When applied in the saturation regime as an amplifier, the GC outperforms conventional GAA transistors presenting simultaneously higher transconductance, lower drain output conductance and more than 15 dB improved linearity. The influence of channel length reduction on the H D is also analyzed. Although slight linearity degradation is observed in both the conventional and the GC devices when reducing the channel length, the HD presented by the GC transistor is significantly lower than the one showed by conventional device for any Studied channel length. This allows AC input signal amplitude up to 20 times higher than the conventional GAA for a same specified distortion level. (C) 2008 Elsevier Ltd. All rights reserved.

Dining room, Mt. Nebo House

Interior view showing fireplace and mezzanine.

Outdoor room, C House, Coorparoo, Brisbane

As seen from upper level of house.

Outdoor room, C House, Coorparoo, Brisbane

Looking towards pool deck, Hanging Basket top right.

Outdoor room, C House, Coorparoo, Brisbane

As seen from upper level of house.

Outdoor room, C House, Coorparoo, Brisbane

Looking towards Iwan from within outdoor room.

Outdoor room, Q House, Chelmer, Brisbane

View from front of property through main entrance to double-height outdoor room. Existing house on right.

Original living room, Kangaroo Point House, Kangaroo Point, Brisbane

Original living room, looking through to new outdoor room.

Original living room, Kangaroo Point House, Kangaroo Point, Brisbane

As seen from outdoor room.

Outdoor room, Kangaroo Point House, Kangaroo Point, Brisbane

Looking towards section of original house from outdoor room area. Hand-made spotted gum columns on edge of outdoor room on right.

Battened roof to outdoor room, Kangaroo Point House, Kangaroo Point, Brisbane

Timber battened concave roof and supporting structure over outdoor room area.

Outdoor room, Kangaroo Point House, Kangaroo Point, Brisbane

Dining setting, sculptures, timber columns and curved roof in outdoor room