Node List Tolerance Analysis: Enhancing SPICE Capabilities by Robert R. Boyd

By Robert R. Boyd

Built at UC Berkeley greater than 20 years in the past, SPICE software program is the software of selection for acting nominal research for digital circuits. in spite of the fact that, makes an attempt to exploit SPICE for worst-case research (WCA) exhibit numerous shortcomings, together with: a 400-sample restrict for Monte Carlo research (MCA); loss of Rot-Sum-Square (RSS) research, uneven part tolerances, speedy MCA, or AC sensitivity potential; no single-run approach to tolerancing inputs; and no predefined beta (skewed) or bimodal (gapped) distributions for MCA. whereas numerous advertisement types of SPICE can have corrected a few of these obstacles, they nonetheless stay really expensive.

Based on large adventure in WCA, Node checklist Tolerance research: improving SPICE services with Mathcad provides software program tools that conquer the numerous barriers of SPICE WCA utilizing less costly instruments. the writer demonstrates right and fallacious equipment of utmost worth research, demonstrates the need of tolerancing a number of inputs, and gives output histograms for strange inputs. He additionally exhibits tips to realize non-monotonic parts, which reason serious mistakes in all WCA tools other than MCA. The ebook additionally comprises demonstrations of tolerance research of three-phase AC circuits.

Node record Tolerance research: improving SPICE functions with Mathcad calls for no circuit research arithmetic, delivering unique tools of nominal circuit research utilizing node lists. it truly is excellent for acting potent analyses whereas adhering to the cheap

Show description

Read or Download Node List Tolerance Analysis: Enhancing SPICE Capabilities with Mathcad PDF

Best circuits books

Analog VHDL

Analog VHDL brings jointly in a single position vital contributions and up to date examine leads to this fast paced quarter. Analog VHDL serves as a very good reference, delivering perception into one of the most hard examine concerns within the box.

Node List Tolerance Analysis: Enhancing SPICE Capabilities with Mathcad

Built at UC Berkeley greater than twenty years in the past, SPICE software program is the instrument of selection for appearing nominal research for digital circuits. although, makes an attempt to take advantage of SPICE for worst-case research (WCA) exhibit a number of shortcomings, together with: a 400-sample restrict for Monte Carlo research (MCA); loss of Rot-Sum-Square (RSS) research, uneven part tolerances, quick MCA, or AC sensitivity potential; no single-run approach to tolerancing inputs; and no predefined beta (skewed) or bimodal (gapped) distributions for MCA.

Electrical Contacts: Principles and Applications, Second Edition

Overlaying the speculation, software, and trying out of touch fabrics, electric Contacts: ideas and purposes, moment version introduces an intensive dialogue on making electrical touch and call interface conduction offers a common define of, and size innovations for, very important corrosion mechanisms considers the result of touch put on whilst plug-in connections are made and damaged investigates the impact of skinny noble steel plating on digital connections and relates the most important issues for making excessive- and low-power touch joints.

Signal Integrity: Applied Electromagnetics and Professional Practice

This textbook teaches easy methods to layout operating structures at very excessive frequencies. it's designed to introduce laptop engineers to the layout of super excessive pace electronic structures. Combining an intuitive, physics-based method of electromagnetics with a spotlight on fixing real looking difficulties, the writer provides thoughts which are crucial for laptop and electric engineers this present day.

Extra info for Node List Tolerance Analysis: Enhancing SPICE Capabilities with Mathcad

Sample text

Fill in the coefficients from the LH sides for W, and for the RH sides for Q per the column headings: iC1 iC 2  0  0  W :=  R2  1 + R1   1 vC1 1   0    1 1 R2  Q :=  −  + +   1 4 1 ⋅ R4  R R R   −1  R4  eL 3 eL 4 0 0 1 0 0 0 −1 0 0 1   0  0 vC 2 iL 3 iL 4 0 1 0 0 −1 R1 1 R3 R2   − 1 +   R1  0 0   0   1  −1 S is created from the only Ein term in the third equation: P is an {N N} diagonal array in the same C and L order as W and Q. fm Page 20 Thursday, January 19, 2006 11:15 AM 20 Node List Tolerance Analysis: Enhancing SPICE Capabilities with Mathcad Because the output is vC2, we place a 1 in the second column of the {K N} array vC1 vC 2 iL 3 D := ( 0 1 0 iL 4 0) Because there are no input terms Ein in the output: E := 0 Prior to this shortcut method [*], the algebra would have to continue as follows.

See, for example, Intermediate Network Analysis, Shlomo Karni, Allyn & Bacon, 1971. mcd A, B, D, and E are not returned. , the determinant of A is zero, and the inverse of A is undefined. Insert R2 to break ACL. R1 V1 R2 Ein C3 V3 V2 R3 C2 C1 V4 L4  99 RR : =  1   3 1 CC : =  2   3 U := 4 Y := 4 LL := (4 0 1 2 4 0 3 0 R1  R 2  R 3 C1  C 3  C2  L3) Reinsert subprogram for new node lists. 5 4 Log freq(Hz) Y=4 REFERENCES 1. R. Boyd, State Space Averaging with a Pocket Calculator, High Frequency Power Conversion Conference Proceedings, Santa Clara, CA, 1990, p.

That is CC = (99 1 C1) or LL = (98 2 L1) are not allowed. This will be a minor inconvenience as every real-world capacitor and inductor has an ESR. Also, every real-world voltage source has some finite internal source impedance which includes resistance. Hence, the simulation will be more realistic with ESR included. 05 Ω for inductors. 4. The nodes Vp or Vn of two or more VCVS’s (EE) must not be common. That is 2 EE =  2 1 0 12 3 4 4 4 2  is not allowed. In the NDS method, this results in “node contention,” and the solution will not be correct.

Download PDF sample

Rated 4.47 of 5 – based on 38 votes