Boots – shoes – and leggings
Patent
1996-11-08
1998-09-15
Teska, Kevin J.
Boots, shoes, and leggings
395500, G06F 1100
Patent
active
058089152
ABSTRACT:
A method for simulating the response of a circuit to one or more stimulating signals using a digital computer. The circuit is represented by N nodes. Each node is connected to one or more devices. The nodes are held at a set of potentials represented by ##EQU1## where X.sub.n,-h =X.sub.n,h.sup.*, n runs from 1 to N, and H is an integer greater than 0. The method of the present invention determines the values . . . , X.sub.1H, X.sub.20, . . . , X.sub.2H, . . . , X.sub.N0, . . . X.sub.NH ! from a previous estimate for X based on F.sub.nh, for n from 1 to N and h from 0 to H. Here, F.sub.nh is the net current flowing into node n at frequency .omega..sub.h. The net current at node n includes a non-linear resistive component r.sub.n (x(t)) and a non-linear charge storage component q.sub.n (x(t)), where x(t) is a vector having components x.sub.n (t). The method of the present invention defines a set of mapped frequencies {.omega..sub.k } wherein 0.ltoreq.k.ltoreq.S-1, S.gtoreq.H+1. There is a integer valued function .mu.(h) such that, .omega..sub.h is mapped to .omega..sub..mu.(h), where 0.ltoreq..mu.(h).ltoreq.S-1 for h=0 to H. Here, .omega..sub.k is an integer, and .omega..sub.k .noteq..omega..sub.k' if k.noteq.k'. The present invention iteratively , F.sub.2H, . . . , F.sub.N0, . . . F.sub.NH ! I=0. In each iteration, the quantities, ##EQU2## where .alpha. and .beta. run from 1 to N, for s=0 to 2S-1 are generated. The quantities (.sup..alpha..beta. .LAMBDA..sub.0, .sup..alpha..beta. .LAMBDA..sub.1, . . . , .sup..alpha..beta. .LAMBDA..sub.s) are then generated from (.sup..alpha..beta. .lambda..sub.0, .sup..alpha..beta. .lambda..sub.1, . . . , .sup..alpha..beta. .lambda..sub.2S-1) by taking the Fourier transform of (.sup..alpha..beta. .lambda..sub.0, .sup..alpha..beta. .lambda..sub.1, . . . , .sup..alpha..beta. .lambda..sub.2S-1). Similarly, the quantities (.sup..alpha..beta. .PHI..sub.0, .sup..alpha..beta. .PHI..sub.1, . . . , .sup..alpha..beta. .PHI..sub.S) are generated from (.sup..alpha..beta. .phi..sub.0, .sup..alpha..beta. .phi..sub.1, . . . , .sup..alpha..beta. .phi..sub.2S-1) by taking the Fourier transform of (.sup..alpha..beta. .phi..sub.0, .sup..alpha..beta. .phi..sub.1, . . . , .sup..alpha..beta. .phi..sub.2S-1). It can be shown that only a subset of {.sup..alpha..beta. .LAMBDA..sub..xi. } and {.sup..alpha..beta. .PHI..sub..xi. } need be stored.
REFERENCES:
patent: 4791593 (1988-12-01), Hennion
patent: 5588142 (1996-12-01), Sharrit
patent: 5666367 (1997-09-01), Troyanovsky
"Efficient Multi-Tone Distortion Analysis of Analog Integrated Circuits", by R. Melville, P. Feldmann, and J. Roychowdhury; Proceedings of the 1995 IEEE Custom Integrated Circuits Conference, May, 1995; pp. 241-244.
"Frequency Domain Continuation Method for the Analysis and Stability Investigation of Nonlinear Microwave Circuits" by D. Hente and R.H. Jansen; IEE Proceedings, vol. 133, Pt. H, No. 5, Oct. 1986; pp. 351-362.
Hewlett--Packard Company
Roberts A. S.
Teska Kevin J.
LandOfFree
Method for reducing the memory required to simulating a circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for reducing the memory required to simulating a circuit , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for reducing the memory required to simulating a circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-95259