Fully symbolic analysis of large analog integrated circuits

Author

Hsu, Jer-Jaw ; Sechen, Carl

Author_Institution

Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA

fYear

1994

fDate

1-4 May 1994

Firstpage

457

Lastpage

460

Abstract

Our fully symbolic analysis algorithms relax the circuit size limitation (due to exponential time and storage complexity) of previously known methods. Our implementation (AnalogSifter) will output simplified symbolic expressions in the desired frequency range for any desired transfer function, including input resistances, output resistances, as well as current and voltage gains. Symbolic pole and zero expressions were extracted accurately in the desired frequency range. Very compact symbolic expressions for the voltage gains of the two-stage CMOS and 741 operational amplifiers were obtained in less than 40 CPU seconds on a SUN SPARCstation 2, and the simplified results match well with the exact numerical values up to the unity gain frequencies in both the magnitude and phase versus frequency plots

Keywords

CMOS analogue integrated circuits; circuit analysis computing; operational amplifiers; poles and zeros; transfer functions; AnalogSifter; CMOS; SUN SPARCstation 2; circuit size limitation; current gain; input resistances; large analog integrated circuits; operational amplifiers; output resistances; pole expressions; symbolic analysis; transfer function; unity gain frequencies; voltage gain; zero expressions; Admittance; Algorithm design and analysis; Analog integrated circuits; Equations; Frequency; Integrated circuit modeling; Poles and zeros; Transfer functions; Vectors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 1994., Proceedings of the IEEE 1994

Conference_Location

San Diego, CA

Print_ISBN

0-7803-1886-2

Type

conf

DOI

10.1109/CICC.1994.379682

Filename

379682