Record RF performance of standard 90 nm CMOS technology

We have optimized 3 key RF devices realized in standard logic 90 nm CMOS technology and report a record performance in terms of n-MOS maximum oscillation frequency f/sub max/ (280 GHz), varactor tuning range and varactor and inductor quality factor

Cross sections for collision-induced rotational transitions of NH3

Contains fulltext : mmubn000001_027051307.pdf (publisher's version ) (Open Access)Promotor : A. Dymanus127 p

A PSP-based small-signal MOSFET model for both quasi-static and nonquasi-static operations

In this paper, a small-signal MOSFET model is described, which takes the local effects of both velocity saturation and transverse mobility reduction into account. The model is based on the PSP model and is valid for both quasi-static and nonquasi-static (NQS) operations. Recently, it has been found that, in the presence of velocity saturation, the low-frequency capacitances cannot be determined from the Ward-Dutton charge-partitioning scheme. By use of the small-signal model developed in this paper, it is demonstrated that, in the presence of velocity saturation, no terminal drain and source charges exist, from which the capacitances can be derived. The small-signal model enables the determination of the correct capacitive behavior in the presence of velocity saturation. Furthermore, it is demonstrated how the small-signal model can be used to determine the number of collocation points needed in the large-signal NQS PSP model. Finally, inclusion of the local variation of mobility reduction due to the vertical electrical fields provides insight into the approach commonly applied in compact modeling, where these fields are replaced by global ones depending on the terminal voltages only

Compact modelling of high-voltage LDMOS devices

In this paper various modelling approaches for Laterally Double-Di used MOS (LDMOS) devices are discussed. Characterisation results for the new compact LDMOS model called MOS Model 20 are presented. Measurements of the dc-current, its conductances and the capacitances obtained from Y -parameters of an LDMOS device, show that MOS Model 20 provides accurate descriptions in all regimes of operation. For future developments, the inclusion of quasi-saturation in MOS Model 20 is demonstrated. Finally, the consequence of the lateral non-uniformity of the LDMOS device for compact modelling is discussed

PSP-based compact FinFET model describing dc and RF measurements

We present a new, PSP-based compact model for symmetric 3-terminal FinFETs with thin undoped or lightly doped body, which is suitable for digital, analog, and RF circuit simulation. The model is surface potential based and is demonstrated to accurately describe both TCAD data and measured FinFET currents, conductances, and capacitances