The ASIZ Program

The ASIZ program

ASIZ is a switched-current and switched-capacitor circuit analysis program. It computes transfer functions in ratio-of-polynomials form in the z-domain, poles and zeros, frequency responses, transient responses, frequency-domain sensitivities, and output signal spectrum.

Four executable versions are available: the new Windows version, the old DOS version, a somewhat faster DOS version compiled with GNU C (djgpp), and a version for Sun workstations, also compiled with GNU C and using the XView interface. All the versions are complete (with minor differences in resources), and work in the same way, with similar graphical interfaces.

The EdFil editor is included in all the versions. It provides easy circuit entry in schematic form, requiring only a minimum of information, typing, and care with the schematic layout.

The use of the ASIZ program is free for academic, noncommercial purposes. For commercial use, please contact the author.

Select a version to download below:

The files are compressed in the "zip" format.

Windows version 2.0i (22/8/2015). The most recent version, and the only one currently supported. Has the same functionality of the last DOS version, and some additions.
DOS version 1.6b. The last DOS version (4/1999), including gain sensitivity discount in the sensitivity analysis, transient analysis with arbitrary input read from a file, and more examples. Updated in 2/2004.
DOS batch-mode version (3/2004). Identical to version 1.6b, but can be run in batch mode.
DOS version 1.3a. This is a well tested old version, kept here for verification, in the case of some of the newer versions presenting some problem.
DOS version 1.4d. Computes direct signal feedthrough and group delay, and has a better transient response plot.
DOS C (djgpp V2) version. Identical to version 1.3a, but faster and with support for larger circuits. Updated in 2/2004.
Sun Unix version 1.2c. Identical to the PC version 1.3a. (Not available.)
Sun Unix version 1.3d. Almost identical to the PC version 1.4d. Requires X11 and Xview. (Not available.)
Linux version 1.3d. Binary files for the ASIZ and EDFIL programs only. Requires X11 and XView. The other files and examples are the same of the Sun distribution above. (Not available.)

There is also a small FAQ (for the old versions) with answers to common questions about ASIZ.

Screen shot from the Windows version

The DOS versions can be run under the program DosBox on modern versions of Windows, under Linux, etc. Screen from the old DOS version.

Created: 1996
Last update: 24/8/2015
Developed and Maintained by Antonio Carlos M. de Queiroz

Lamento informar que o Prof. Antonio Carlos Moreirão de Queiroz faleceu há algum tempo.
Sei que esta página é visitada constantemente. Assim, gostaria de saber se temos algum visitante (interessado) que seja da UFRJ. Se for, por favor, envie um e-mail para watanabe@coe.ufrj.br.
Comento que é impressionante ver o que Moreirão foi capaz de fazer. Ele não só projetou os circuitos, mas também fez todo o trabalho de marceneiro (melhor que muitos que já vi e eram profissionais).
Segundo Moreirão contou em uma palestra, ele só levou choque uma vez. Sem querer encostou o dedo médio em um capacitor com alta tensão que se descarregou através do dedo. A corrente ao passar por uma das articulações a danificou e doía sempre que dobrava esse dedo. Mas, segundo ele, já tinha acostumado.
E. Watanabe (ELEPOT)