TopSpice is an affordable integrated computer-aided circuit design software package offering advanced native mixed-mode mixed-signal analog/digital/behavioral simulation based on the industry standard SPICE simulator program.
TopSpice is a true analog/digital/behavioral mixed-mode circuit simulator for the PC. It offers the most advanced SPICE simulator in its price range, compatibility, an easy to use integrated design environment from schematic capture to graphical waveform analysis, and full 64-bit operation for faster performance and larger memory space.
With TopSpice you have the choice to design from schematic drawings, text netlist (SPICE) files or both. All design and simulation functions are available from either the schematic or netlist editor front-ends.
TopSpice includes a native full-featured mixed-mode mixed-signal circuit simulator capable of simulating circuits containing any arbitrary combination of analog devices, digital functions and high-level behavioral blocks. With TopSpice you can verify and optimize your design from the system to the transistor level. By using the built-in logic simulator to simulate the digital sections of your circuit instead of analog equivalents, mixed-mode simulation times can be reduced by orders of magnitude.
TopSpice offers industry standard PSpice and HSPICE compatible* simulation. TopSpice works with most PSpice netlists, manufacturer SPICE model libraries and IC foundry HSPICE libraries.
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* Compatibility is limited only to the set of HSPICE features and functions implemented in TopSpice.
Advanced simulation and plotting functions.
SPICE has become the de facto industry standard for analog circuit simulation. It offers the advantages of a large user base, large number of existing device models, modeling support by component manufacturers, and compatibility between CAD vendors. However, SPICE is an analog only simulation technology. State-of-art mixed technology circuit designs require a hierarchical top-down design environment with a circuit simulator capable of handling different levels of abstraction simultaneously.
TopSpice implements a fully integrated mixed-mode simulation technology. The analog electrical simulation and the logic simulation algorithms are merged into a single simulator architecture. Both algorithms operate under a single event scheduler to most efficiently solve time advancement, backup, signal conversion and convergence issues in mixed-mode simulation.
The logic simulator implemented in TopSpice is fully event-driven. The digital section of the circuit is only evaluated when a logic event takes place during the simulation. Since logic simulation is most efficiently handled in terms of discrete time steps, TopSpice uses independent time steps for simulating the analog and digital sections of the circuit. TopSpice also implements a common SPICE like input syntax for both analog and digital sections for getting those designers familiar with SPICE rapidly on board.
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TopSpice offers advanced frequency response analysis of switching circuits.
The analog behavioral modeling capability allows the designer to describe electronic components and circuit functional blocks using transfer functions. This "black box" approach is a very powerful tool for modeling complex devices, speeding up simulation of large systems and developing a top-down design methodology.
The following options for specifying transfer functions are available in TopSpice: arbitrary equations of V, I, time and temperature; built-in math functions; look-up tables; Laplace transforms; frequency response tables; s-parameter tables; logical and relational expressions.
| *Behavioral model of comparator ECOMP 1 0 TABLE {V(in)} = (-1mV,0.2V) (1mV,3.6V) RES 1 0 150 ;source load *Transmission line used as a delay line TDLY 1 0 delay 0 (ZO=150 TD=20ns) RTL delay 0 150 ;termination *Digital D flip-flop element U1 DFF outlo outhi $D_HI $D_HI in delay FFD .MODEL FFD UEFF (TPCLKLH=2ns TPCLKHL=2ns) |
TopSpice mixed-mode description of a FSK demodulator.
TopSpice offers a fully integrated environment to capture, simulate, and analyze your circuit designs. Its flexible architecture allows the designer to integrate all the design tools, including third party tools and model libraries, into a complete EDA system.
The schematic editor front-end provides an easy way to create and edit circuit drawings. TopSpice Schematic features:
TopSpice offers both an easy to use interface for beginners and maximum flexibility for expert SPICE users. Most simulation analysis commands can be specified by selecting menu options. Experienced SPICE users also have the option of entering commands in text form directly on the schematic drawing or a separate command file.
TopView interactive graphical SPICE post-processor program to plot and analyze SPICE output data features:
Powerfun waveform and data analysis functions.
Extensive simulation model library of over 35,000 analog and digital parts. TopSpice is also compatible with most SPICE model libraries supplied by component manufacturers and other SPICE vendors, and many IC foundry process model libraries.
The model library includes discrete parts, analog IC parts, optoelectronic devices,, magnetic parts, digital logic families, power semiconductors, SMPS design models, cables, vacuum tubes, models from component vendors, and many more.
To view the complete list of models included, browse the Model Library Catalog file (library.txt). Or, download and install the Demo version. Then, open the "Model Library Database" icon in the TopSpice Demo program folder, or select Tools|Model libraries|Model Database command from either the Schematic Editor or Circuit File Editor menu.
Complete manuals (over 600 pages) available in PDF format, online help, over 400 example circuit files, and complete device model library database.
We provide comprehensive and prompt support for our products to registered users:
2 Limitations apply, see
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for full details.
Penzar Development makes frequent product updates in response to technology advances and user feedback. Service Updates and Patches for the current version are free to registered users. Major updates are offered as version upgrade products at a substantial discount over the full product price.
Prices and product specifications are subject to change without notice.
PSpice is a registered trademark of Cadence Design Systems, Inc.
HSPICE is a registered trademark of Synopsys Inc.
Other company and product names are trademarks or registered trademarks
of their respective holders.
Pricing and Ordering Information
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