A new symbolic program package for the interactive design of analog circuits

Liberatore, A.; Luchetta, Antonio; Manetti, S.; Piccirilli, Maria Cristina

doi:10.1109/iscas.1995.523866

Cited by 26 publications

(14 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper, the Bode plots of the four network functions were derived using the program SapWin, developed by the same authors, for symbolic analysis of linear circuits [12]- [14]. This program allows for both the derivation of the network function expressions and the complete circuit simulation of linear circuits.…”

Section: A Switching Cell Equivalent Circuit Parameter Expressions Imentioning

confidence: 99%

“…A small-signal equivalent circuit cannot describe the switching waveforms of a DC-DC converter, but it is suitable for an accurate, fast, straightforward frequency-domain analysis of a converter, including parametric analysis. Moreover, it is very suitable for simulators such as SPICE and SapWin [12]- [14]. In certain cases also the MOSFET delay time must be included in the frequency domain analysis [5] and [15].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Derivation of network functions for PWM DC-DC Buck converter in DCM including effects of parasitic components on diode duty-cycle

Luchetta

Manetti

Piccirilli

et al. 2015

2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC)

View full text Add to dashboard Cite

The paper considers an open loop-operation of a PWM DC-DC Buck converter at a constant duty-cycle. Under these conditions, the converters compensate the effects of the parasitic resistances adjusting the diode duty-cycle D1. All four network functions describing the frequency-domain behavior of a discontinuous conduction mode (DCM) operated DC-DC buck converter power stage are derived considering D1 adjustments. These network functions are derived in a closed form both manually and by using a symbolic circuit simulator. Bode plots of the network functions are also given for the buck converter. These functions are derived by utilizing a small signal equivalent circuit of the switching-cell composed of controlled current sources and resistances. Experimental results confirm the accuracy of theoretical derivations.

show abstract

Section: A Switching Cell Equivalent Circuit Parameter Expressions Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Derivation of network functions for PWM DC-DC Buck converter in DCM including effects of parasitic components on diode duty-cycle

Luchetta

Manetti

Piccirilli

et al. 2015

2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC)

View full text Add to dashboard Cite

show abstract

“…1(b) has been implemented in a computer program SAPWIN [4]- [6], which is a Windows program package developed for symbolic and numerical simulation of linear, time-invariant circuits. This program has been utilized to automatically derive the sdomain expressions of the converter ac-model transfer functions and draw the related root-loci and Bode plots.…”

Section: Buck-boost Converter Circuitmentioning

confidence: 99%

Computer aided small-signal analysis for PWM DC-DC converters operated in discontinuous conduction mode

Reatti

Balzani²

2005

48th Midwest Symposium on Circuits and Systems, 2005.

View full text Add to dashboard Cite

A computer analysis of PWM dc-dc converters operated in discontinuous conduction mode DCM is presented. The analysis is based on a linearized small-signal model of the converter ideal switching-cell (ISC), which is used as a sub-circuit inside the circuit simulation program. The sub-circuit is used in computer simulation of a PWM buck-boost converter, which is based on equivalent circuits. A computer program for PWM dc-dc converters analysis, generates the symbolic expressions of the root locus and Bode plots of the control-to-output voltage transfer function, the input-to-output voltage transfer function, the input impedance, and the output impedance which are given both in symbolic and numerical expression.

show abstract

“…Several symbolic simulators exist, such as SNAP [1], FLOWUP [2], ISAAC [3], ASAP [4], BRAINS [5], SYNAP [6], SSPICE [7], MASSAP [8], SCAPP [9], EASY [10], and SAPWIN [11], in addition to programs in [12] and [13]. These programs can be used to generate the initial transfer functions for the P/G networks.…”

Section: Introductionmentioning

confidence: 99%

An algorithm for simulating power/ground networks using Pade approximants and its symbolic implementation

Shah

Younis

Sapatnekar

et al. 1998

IEEE Trans. Circuits Syst. II

View full text Add to dashboard Cite

This paper presents an event-driven algorithm and its symbolic implementation for the analysis of power and ground (P/G) bus networks. The algorithm uses frequency-domain techniques and moment matching approaches based on Padé approximants to estimate the transfer function at each node in the P/G network. Afterwards, the transient waveforms are extracted for each node. The process requires repetitive simulation of a linear and time-variant (from one time event to the next) circuit model for the P/G network which is the reason a symbolic implementation was produced. The P/G network is modeled by a hierarchical combination of mesh and tree structures that are composed of a collection of RC--segments and pulldown (or pullup) switches. The switches are symbolically represented by Boolean variables and a compiled symbolic code is generated only once for each P/G network. The transient waveforms are then produced by repetitive evaluation of the symbolic output. The results show that the symbolic implementation is an order of magnitude faster, with reasonably good accuracy, than using a traditional analog circuit simulator like SPICE.Index Terms-Padé approximants, power/ground networks, symbolic analysis, VLSI.

show abstract

A new symbolic program package for the interactive design of analog circuits

Cited by 26 publications

References 4 publications

Derivation of network functions for PWM DC-DC Buck converter in DCM including effects of parasitic components on diode duty-cycle

Derivation of network functions for PWM DC-DC Buck converter in DCM including effects of parasitic components on diode duty-cycle

Computer aided small-signal analysis for PWM DC-DC converters operated in discontinuous conduction mode

An algorithm for simulating power/ground networks using Pade approximants and its symbolic implementation

Contact Info

Product

Resources

About