S-parameter output from the SPICE program

Bhattacharya

Proceedings of the 2014 IEEE Students' Technology Symposium

et al. 2014

The work in this paper presents analysis of graphene nanoribbon (GNR) as nano-interconnect for radio-frequency (RF) VLSI circuits for 16 nm technology node. A frequency dependent electrical equivalent model is developed by calculating the circuit parameters based on interconnect geometry. Using the developed model the RF performance of GNR based interconnects is investigated and compared to that of copper based interconnects for 16 nm technology node. It is shown that GNR based interconnect shows better performance for operating in and beyond 1000 THz frequency range for shorter interconnect length.

Section: Resultsmentioning

confidence: 99%

RF performance analysis of graphene nanoribbon interconnect

Bhattacharya

Proceedings of the 2014 IEEE Students' Technology Symposium

et al. 2014

Radio Frequency Circuit Design

“…In [4] the S parameters were obtained for a given circuit from SPICE for a two -port circuit in which the input and output resistances were both 50 Ω . However, the conversion circuit used to obtain the S parameters can be modifi ed so that the two ports of the circuit are at different impedance levels ( Fig.…”

Section: G2 Frequency -Domain S Parametersmentioning

confidence: 99%

Appendix G: Transformed Frequency‐Domain Measurements Using SPICE

Davis

2010

Time -domain measurements taken on an automatic network analyzer can be easily replicated theoretically for dispersionless transmission lines using the SPICE time -domain program simulation. A technique is presented here that gives the type, value, and position of a measured discontinuity directly from time -domain measurements. Furthermore, the effect of multiple discontinuities can be replicated by SPICE.Microwave impedance measurements have evolved from the slotted line to the computer -controlled automatic network analyzer. One of the major innovations of the network analyzer made possible by its broadband frequency capability was the simulation of time -domain measurements. Though fundamentally a frequency -domain machine, the network analyzer has been very useful in doing time -domain analysis of broadband circuits. This was demonstrated by the pioneering work of Hines and Stinehelfer [1] . Fundamentally, time -domain equipment such as the time -domain refl ectometer have lagged because of the requirement for fast switching devices. However, that has not been true of the software side, as the widespread use of SPICE can readily attest. Here, it will be demonstrated how time -domain measurements on the network analyzer can be simulated using the transient analysis in SPICE.There have been several studies that have shown how S parameters can be plotted using SPICE [2 -4] . SPICE can be used to model physical directional Radio Frequency Circuit Design, Second Edition, by W. Alan Davis

IEEE Trans. Circuits Syst. I

“…The poles of are the roots of . From the expressions of -parameters in terms of -or -parameters [6], it is found that the denominators, or the poles, of all -parameters are the same. Hence, is equivalent to the characteristic equation for the poles of voltage gain.…”

Section: Theorymentioning

confidence: 99%

“…However, such an approach is too complex and tedious to gain useful insights. There are methods of plugging in to determine -parameter macros on SPICE for the analog circuit [6], but they do not give the analytical forms. Therefore, in this paper, a technique to perform useful -parameter estimation using hand analysis is introduced.…”

Section: Introductionmentioning

confidence: 99%

The determination of S-parameters from the poles of voltage-gain transfer function for RF IC design

Lu¹,

Lin

Chiu

et al. 2005

A method for estimating the -parameters of active circuits using hand analysis is introduced. This method involves the determination of -parameters from the poles of voltage-gain transfer function. It is found that the information on the frequency responses of input/output return loss, input/output impedance, and reverse isolation is all hidden in the poles or equivalently in the denominator of the voltage-gain transfer function of a circuit system. The method has been applied to three commonly used RF circuit configurations and one fabricated CMOS wide-band amplifier to illustrate the usefulness of the proposed theory.