2011-03-02 Stefan Jahn * transline.tex (subsection{Losses}): Fixed documentation of conductor losses in coaxial line. 2009-05-19 Stefan Jahn * maths.tex (section{Frequency-Time Domain Transformation}): Fixed typo in IDFT equation. 2009-05-14 Stefan Jahn * transline.tex (subsection{Cutoff frequencies}): Fixed computation of cut-off frequencies 2008-02-22 Stefan Jahn * lineardevices.tex (subsection{T-parameters}): Added MNA matrix representations for T-parameters. 2008-02-21 Stefan Jahn * lineardevices.tex (section{Extended MNA stamping}): Added MNA matrix representations for A-, H- and G-parameters. 2007-12-07 Stefan Jahn * hbanalysis.tex (section{Autonomous Harmonic Balance}): Added new section. Thanks to Michael. Also fixed some description of HB analysis. 2007-10-02 Stefan Jahn * literature.bib: Fixed publication year of R. C. Compton and D. B. Rutledge, "Perspectives in Microwave Circuit Analysis". 2007-06-02 Stefan Jahn * lineardevices.tex (subsection{Mutual inductors with any number of inductors}): Corrected S-parameter section for mutual inductors. 2007-05-17 Stefan Jahn * lineardevices.tex (subsection{Mutual inductors with any number of inductors}): Added Z-parameter representation of mutual inductors. * devices.tex (subsection{Models with Implicit Equations}): Fixed sign in S-parameter equations. 2007-03-24 Stefan Jahn * maths.tex (paragraph{Zeros on the diagonal or super-diagonal.}): Finished the paragraphs about the SVD equation system solver. (paragraph{Computation of the Wilkinson shift.}): Fixed typo in the calculation formula for the Wilkinson shift. 2007-03-11 Stefan Jahn * maths.tex (subsubsection{Step 3: Diagonalization -- shifted QR iteration}): Again some more words about diagonalization during SVD. 2007-03-10 Stefan Jahn * maths.tex (subsubsection{Eigenvalues of a 2-by-2 matrix}): Added short section about eigenvalues of 2-by-2 matrices. (subsubsection{Step 3: Diagonalization -- shifted QR iteration}): Some more descriptions about the diagonalization during SVD. Not yet finished. 2007-03-07 Stefan Jahn * transline.tex (subsection{Transmission losses}): Described the transmission line loss model of the twisted-pair line. * transient.tex (subsubsection{Ideal 4-terminal transmission line}): Documented transient model of the 4-terminal line. 2007-01-27 Stefan Jahn * microstrip.tex (section{Bondwire}): Documented the bondwire model. 2007-01-21 Stefan Jahn * lineardevices.tex: Fixed S-parameters for 4-port transmission line. 2006-09-14 Stefan Jahn * devices.tex (subsection{Large signal model}): Documented the theory about the excess phase implementation in a BJT. 2006-09-10 Stefan Jahn * devices.tex (subsubsection{Original SPICE model}): Added some more comments about the original SGP model implementation and also fixed documentation regarding the transcapacitance dQbe/dVbc. 2006-07-02 Stefan Jahn * maths.tex (chapter{Mathematical background}): Moved the chapter about linear equation systems from the DC chapter here. Started to document the SVD... to be continued. 2006-05-11 Stefan Jahn * technical.tex: Fixed compatibility code for latex/pdftex. * dcanalysis.tex (section{Overall solution algorithm for DC Analysis}): Added section for DC solution flow chart. 2006-04-16 Stefan Jahn * transline.tex (section{Twisted pair}): Fixed formulas for twisted pair line. 2006-04-15 Stefan Jahn * hbanalysis.tex (subsection{Frequency-Time Domain Transformation}): Put listings into a real 'lstlisting' environment. Also fixed some typos. 2006-03-26 Stefan Jahn * transline.tex (section{Twisted pair}): Documented twisted pair analysis equations. 2006-03-18 Stefan Jahn * literature.bib: Added some books lend from library. 2006-03-05 Stefan Jahn * transient.tex (subsection{AM modulated AC source}): Documented AM and PM modulated sources in the time domain. (section{Components defined in the frequency domain}): Started to document the transient analysis of components defined in the frequency domain with constant delay times. 2006-02-21 Stefan Jahn * synthesis.tex (subsubsection{Chebyshev I}): Documented required order formulas for Butterworth, Chebychev 1+2. 2006-01-29 Stefan Jahn * coaxial.tex: Started new chapter about coaxial components. 2006-01-16 Stefan Jahn * acanalysis.tex (subsection{Coupler}): Fixed DC MNA matrix entries for ideal coupler device. 2006-01-10 Stefan Jahn * sparameter.tex (subsection{Coupler}): Added figure showing the port numbers of the coupler device. 2006-01-06 Stefan Jahn * microstrip.tex (section{Microstrip cross}): Added remaining paper references known so far. 2005-12-15 Stefan Jahn * devices.tex (subsection{Temperature model}): Documented temperature and area dependencies for diode, JFET, MOS and bipolar transistor. 2005-12-11 Stefan Jahn * microstrip.tex (section{Microstrip via hole}): Clarified some math symbols in the via description. * devices.tex (subsection{Temperature model}): Started to document the temperature dependencies of the diode model. 2005-11-05 Stefan Jahn * Makefile.am: Added rules for final data creation: 'html' and 'technical'. 2005-09-25 Stefan Jahn * transient.tex (subsubsection{Backward Euler}): Fixed forward/backward Euler confusions. 2005-07-18 Stefan Jahn * acanalysis.tex (subsection{Non-ideal transformer}): Fixed conversion formula for non-ideal transformer. 2005-06-19 Stefan Jahn * literature.bib: Added some more books and articles. 2005-05-15 Stefan Jahn * coplanar.tex (section{Coplanar waveguide step}): Added S-, Y- and Z-parameters of coplanar step. 2005-05-11 Stefan Jahn * coplanar.tex (section{Coplanar waveguide step}): Documented coplanar waveguide impedance step. 2005-05-03 Stefan Jahn * coplanar.tex (section{Coplanar waveguide gap}): Documented coplanar series gap. 2005-05-01 Stefan Jahn * coplanar.tex (section{Coplanar waveguide open}): Documented both the open and short circuit for coplanar waveguides. 2005-04-19 Stefan Jahn * transient.tex (subsection{Depletion Capacitance}): Fixed tiny typo in documentation of depletion charge. * coplanarzl.m: Fixed wave resistance computation. * coplanar.tex (subsection{Evaluation of losses}): Fixed some typo in the documentation of coplanar waveguide. 2005-04-12 Stefan Jahn * dcanalysis.tex (subsubsection{Motivation}): Documented least square solution using QR decomposition. 2005-04-06 Stefan Jahn * microstrip.tex (section{Microstrip via hole}): Fixed typo in microstrip via hole documentation. * dcanalysis.tex (subsection{QR decomposition}): Documented QR decomposition. 2005-03-12 Stefan Jahn * devices.tex (subsection{Small signal model}): Documented SPICE small signal equivalent BJT circuit. * microstrip.tex (subsection{Strip thickness correction}): Documented strip thickness corrections for coupled microstrips. 2005-02-23 Stefan Jahn * microstrip.tex (section{Microstrip tee junction}): Added note about displacement interpretations and mentioned negative transformer ratios. * hbanalysis.tex (subsection{Creating Transadmittance Matrix}): Fixed spelling mistake and CVS conflict. 2005-02-19 Stefan Jahn * grammar-data.tex (section{Qucs dataset grammar}): Added a small comment about dataset content. 2005-02-17 Raimund 'Raimi' Jacob * grammar-data.tex: Added grammar for the dataset. Put all grammars into one appendix, share the introduction. 2005-02-16 Stefan Jahn * technical.tex: Added Raimund Jacob as author. * hbanalysis.tex (subsection{Creating Transadmittance Matrix}): Fixed some typos. * grammar-qucs.tex (chapter{Qucs netlist grammar}): Fixed comments on each grammer item as required. Fixed some typos. * acnoise.tex (section{The Algorithm}): Added a note about the transposed LU decomposed matrix during AC noise analysis. 2005-02-13 Stefan Jahn * acnoise.tex (subsection{Noise voltage source}): Documented AC noise matrices for noise voltage sources. 2005-02-13 Raimund 'Raimi' Jacob * grammar-qucs.tex (chapter{Qucs netlist grammar}): Also finished the lexical structure. Re-ordering of the syntax. 2005-02-12 Raimund 'Raimi' Jacob * grammar-qucs.tex (chapter{Qucs netlist grammar}): Begin of some documentation of the netlist file. Move this and the bibliography into an appendix. 2005-02-05 Stefan Jahn * technical.tex: Updated copyright dates. * Makefile.am (PSFILES): Added missing 'MNAnoise*.eps' files. 2004-12-08 Stefan Jahn * coplanar.tex (chapter{Coplanar components}): New file containing documentation about coplanar components. Thanks to Vincent. * technical.tex: Added copyright for Vincent. * transient.tex (subsection{MOS Gate Capacitances}): Added section about integration of the Meyer MOS capacitances. 2004-11-23 Stefan Jahn * dcanalysis.tex (subsection{Operational amplifier}): Also documented how non-linear DC analysis of the operational amplifier works. 2004-11-01 Stefan Jahn * microstrip.tex (section{Microstrip via hole}): Added small figure for microstrip via hole. * transient.tex (subsubsection{Minimal derivative Gmin stepping}): Finished section about continuation schemes. 2004-10-29 Stefan Jahn * Makefile.am (EXTRA_DIST): Decided to remove the postscript technical documentation from the release tarball. * technical.tex: Added hyperref package for PDF output. 2004-10-26 Stefan Jahn * transient.tex (section{Convergence}): Wrote something about limiting and continuation schemes for convergence improvements. 2004-10-25 Stefan Jahn * transient.tex (section{Convergence}): Started to document convergence issues in transient analysis. * microstrip.tex (section{Microstrip via hole}): Documented microstrip via hole equations. 2004-10-23 Stefan Jahn * devices.tex (section{MOS Field-Effect Transistor}): Fixed unit of transconductance parameter. 2004-10-19 Stefan Jahn * literature.bib: Two new references added. 2004-10-17 Stefan Jahn * transient.tex (subsection{Diffusion Capacitance}): Scribbled down charge and capacitance of the usual depletion and diffusion capacitance. 2004-10-16 Stefan Jahn * *.tex: Added copyright notice in all LaTex files. 2004-10-08 Stefan Jahn * dcanalysis.tex (subsection{Symmetrical transformer}): Fixed DC equations of the symmetrical transformer in documentation. * transient.tex (subsection{Order and local truncation error}): Scribbled down the error constants for explicit Gear method. * stabgearex.m: New file computing order, steps, error constants and stability regions of explicit Gear formulae. 2004-10-01 Stefan Jahn * technical.tex (subsection{Properties of numerical integration methods}): Added introduction to mathematical terms. (section{Predictor-corrector methods}): Started to document the predictor-corrector methods. * stabbashford.m, stabmoulton.m: Additionally displaying the error coefficients of each integration order. 2004-09-29 Stefan Jahn * Makefile.am (dist_man_MANS): Added simple man page. 2004-09-26 Stefan Jahn * technical.tex (subsection{Controlled sources}): Documented the MNA matrix entries of various AC components. 2004-09-25 Stefan Jahn * technical.tex (subsection{Depletion Capacitance}): Documented handling of depletion and diffusion capacitances during transient analysis. (subsection{Transmission line}): Fixed Y-parameters of lossless transmission line. 2004-09-22 Stefan Jahn * technical.tex (subsection{Stability considerations}): Finished section about stability of integration methods. 2004-09-20 Stefan Jahn * technical.tex (subsection{Stability considerations}): Checked zero-stability and absolute stability ranges for Adams-Moulton, Adams-Bashford and Gear. Visualized these in three new plots and included them into documentation. 2004-09-19 Stefan Jahn * technical.tex (subsubsection{Inductor}): Small section about the accompanied inductor model for transient analysis added. * technical.tex (subsubsection{Adams-Bashford}): Documented Adams-Bashford and Adams-Moulton integration formulas. 2004-09-14 Stefan Jahn * technical.tex (subsubsection{Capacitor}): Some more documentation about integration methods added. 2004-09-13 Stefan Jahn * technical.tex (chapter{Transient Analysis}): Started to document transient analysis. 2004-09-10 Stefan Jahn * technical.tex (subsubsection{Schneider}): Documented dispersion models of single microstrip by M.V. Schneider. 2004-09-09 Stefan Jahn * technical.tex (subsubsection{Schneider}): Documented all the M.V. Schneider formulae. * mszl.m: Plotting Hammerstad instead of Wheeler. 2004-09-08 Stefan Jahn * technical.tex (subsubsection{Kirschning and Jansen}): Documented dispersion of characteristic impedance of single microstrip line acording to Kirschning. (subsubsection{Kirschning and Jansen}): Filled the missing paper references for coupled microstrips. 2004-09-07 Stefan Jahn * technical.tex (chapter{AC Analysis}): Started to document the AC simulation and components. * literature.bib: Completed the 'local' entries for IEEE publications. 2004-09-06 Stefan Jahn * technical.tex (subsection{Forming the noise current correlation matrix}): Fixed the example figure for the noise correlation matrix. 2004-09-03 Stefan Jahn * technical.tex (subsubsection{Pramanick and Bhartia}): Documented dispersion model of characteristic impedance by Pramanick. 2004-09-02 Stefan Jahn * technical.tex (subsubsection{Hammerstad and Jensen}): Fixed descriptions and formulas of parallel coupled microstrip lines. 2004-08-22 Stefan Jahn * technical.tex (subsubsection{Edwards and Owens}): Documented a few more dispersion formulas for microstrip. 2004-08-20 Stefan Jahn * technical.tex (subsection{S-parameter container with additional reference port}): Documented 'spfile' class implementations. (subsubsection{Hammerstad and Jensen}): Documented Getsinger's dispersion formulas for coupled microstrips. 2004-08-19 Stefan Jahn * technical.tex (subsubsection{Hammerstad and Jensen}): Documented coupled microstrip model by Hammerstad and Jensen and transmission line losses of coupled lines. 2004-08-17 Stefan Jahn * technical.tex (section{Microstrip open}): Revisited microstrip open, step, corner and gap documentation. 2004-08-16 Stefan Jahn * technical.tex (subsection{Small signal model}): Documented excess phase parameter of BJT model. 2004-08-15 Stefan Jahn * technical.tex (subsection{Jacobi method}): Documented Schmidt and v.Mises convergence criteria. 2004-08-14 Stefan Jahn * technical.tex (subsection{Noise model}): Documented small signal and noise model of the MOSFET device. 2004-08-12 Stefan Jahn * technical.tex (subsection{Gauss-Seidel method}): Documented Gauss-Seidel and Jacobi methods for solving linear equation systems (both iterative methods). (subsection{Convergence}): Made some additional remarks about convergence helpers. 2004-08-07 Stefan Jahn * technical.tex (subsection{Physical model}): Completed the documentation about the large signal and physical model of the MOSFET level 1. 2004-08-05 Stefan Jahn * technical.tex (section{MOS Field-Effect Transistor}): Started to document the MOSFET model. 2004-08-03 Stefan Jahn * technical.tex (subsection{Large signal model}): Fixed bug in Id model of junction FET. Replaced the O of O. Jensen to the norwegian {\O}. 2004-08-01 Stefan Jahn * technical.tex (subsubsection{Mixed Two-Port matrix conversions}): Added the formulas for G to S and S to G transformations. (section{PN-Junction Diode}): Documented new model parameters 'Fc', 'Cp', 'Isr' and 'Nr'. 2004-07-31 Stefan Jahn * technical.tex (subsection{Gauss-Jordan method}): Documented Gauss-Jordan method for solving linear equation systems. (subsection{Diode}): Fixed equations for noise. 2004-07-28 Stefan Jahn * technical.tex (subsubsection{Two-Port parameters of passive devices}): New subsection about standard passive circuit topologies and their matrix representations. (subsection{Noise model}): Documented noise model of diode and SGP model of BJT. 2004-07-27 Stefan Jahn * technical.tex (subsection{Noise model}): Documented noise model of junction FET. (section{Noise Correlation Matrix Transformations}): How noise correlation matrix conversions work. 2004-07-21 Stefan Jahn * technical.tex: Changed some latex statements for better readablity. 2004-07-18 Stefan Jahn * technical.tex (subsection{Strip thickness correction}): Added a section about the strip thickness effects on quasi- static characteristics of a microstrip line. 2004-07-17 Stefan Jahn * technical.tex (subsection{S-parameter of the single microstrip line}): Added this section documenting the calculation of the microstrip line S-parameters. 2004-07-16 Stefan Jahn * technical.tex (section{Dispersion}): Added some comments about the various dispersion models of microstrip. * mscomparezl.m: Using Hammerstad and Jensen as reference when comparing quasi-static impedances of microstrip. 2004-07-11 Stefan Jahn * technical.tex (subsection{Small signal model}): Documented the SGP small signal model. 2004-07-10 Stefan Jahn * technical.tex (subsection{Large signal model}): Documented the SGP large signal model properly. 2004-07-06 Stefan Jahn * technical.tex (section{Noise Wave Correlation Matrix in CAE}): Fixed two of the formulas for noise correlation matrix elements. 2004-07-03 Stefan Jahn * technical.tex (subsubsection{Mixed Two-Port matrix conversions}): Added S to H and its reverse transformation. (subsubsection{Two-Port matrix conversion based on current and voltage}): Scribbled down the five different matrix forms. 2004-07-02 Stefan Jahn * technical.tex (subsubsection{Two-Port matrix conversion based on current and voltage}): Added some more twoport theory. 2004-07-01 Stefan Jahn * technical.tex (subsection{Two-Port transformations}): Documented some twoport matrix transformations. 2004-06-30 Stefan Jahn * technical.tex (subsection{S-parameters in CAE programs}): Documented use of signal flow graphs and the nontouching-loop rule for solving them. 2004-06-27 Stefan Jahn * technical.tex (subsection{Operational amplifier}): Added a note about OPAMP feedback impedance. 2004-02-07 Michael Margraf * added some noise formulas * added description for phase shifter DC model 2004-06-22 Stefan Jahn * radius.m, mszl.m, mscomparezl.m: Using the epstk for producing eps files. 2004-06-19 Stefan Jahn * technical.tex (section{Junction FET}): Documented modelling the junction capacitances of JFET diodes. (subsection{Convergence}): Documented a convergence problem solution. 2004-06-10 Stefan Jahn * technical.tex (section{Junction FET}): Scribbled down S-parameters of junction FET and added the small signal equivalent circuit. 2004-06-09 Stefan Jahn * technical.tex (section{PN-Junction Diode}): Documented large and small signal parameters of pn-junction diode. 2004-06-06 Stefan Jahn * technical.tex (section{Junction FET}): Started to document Shichman-Hodges equations and derivatives fo JFET model. 2004-06-03 Stefan Jahn * technical.tex (section{Non-linear DC Analysis}): Started to document non-linear DC analysis using Newton-Raphson. 2004-05-21 Stefan Jahn * technical.tex (subsection{A comparison}): Added a table comparing algorithms for solving equation systems. 2004-05-20 Stefan Jahn * technical.tex (subsection{Gaussian elimination}): Documented the Gaussian eliminiation algorithm for solving linear equations systems. (subsection{LU decomposition}): Documented Crout's LU decomposition. * literature.bib: Added some more IEEE papers and books. 2004-05-16 Stefan Jahn * Makefile.am (MATHFILES): New files added. Octave is now needed in order to rebuild the documentation. 2004-05-12 Stefan Jahn * technical.tex (chapter{Microstrip components}): New chapter. Started to document microstrip models. * msline.fig: New figure. 2004-05-09 Stefan Jahn * literature.bib: Added some microstrip related IEEE sources. 2004-04-28 Stefan Jahn * technical.tex (section{Matrix conversions}): Documented matrix conversion algorithms. 2004-02-18 Stefan Jahn * literature.bib: Added reference for natural constants. 2004-02-15 Stefan Jahn * technical.tex (section*{Solving linear equation systems}): Started writing a section about solving linear equations systems. (subsection*{Gyrator}): Fixed description of gyrators MNA matrix represention. 2004-02-10 Stefan Jahn * technical.tex: Fixed descriptions of MNA stamps of operational amplifier, ccvs, cccs, vccs and vcvs. 2004-02-07 Michael Margraf * technical.tex: Add noise correlation matrix for noise sources and diode. 2004-02-05 Stefan Jahn * technical.tex: Added a simple example to the MNA documentation. 2004-02-04 Stefan Jahn * technical.tex (section*{Modified Nodal Analysis}): Wrote documentation about basic idea of MNA. 2004-01-31 Stefan Jahn * technical.tex (subsection*{Symmetrical transformer}): Added figures for symmetrical trafo and normal two winding trafo. Documented MNA entries for symmetrical transformer. Switched over to IEEtran bibliography style. 2004-01-30 Stefan Jahn * technical.tex (subsection*{Transformer}): Documented DC simulation of ideal transformer. 2004-01-29 Stefan Jahn * Makefile.am: Added rules for bibliography creation. * technical.tex (subsection*{Current controlled voltage source}): Added description of CCVS for use in DC analysis. Added figures for VCCS, VCVS, CCVS and CCCS. Added bibliography. 2004-01-28 Stefan Jahn * technical.tex (section*{Extensions to the MNA}): Documented VCCS, VCVS and CCCS for use in DC analysis. 2003-12-26 Stefan Jahn * Makefile.am (CLEANFILES): Updated clean files.