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AN-138: SPICE-Compatible Op Amp Macro-Models: AN-138
Analog Devices Application Notes (app note added 6/06)
AN23 Zetex SPICE Models: Understanding Model Parameters and Applications
Limitations: Zetec Semiconductors Applications Notes This report describes basic Gummel-Poon model as used as a basis
for analog circuit simulations. An overview of model parameters and ir derivation, as well as guidelines for model manipulation for
specific cases are also included. A number of typical application circuits are suggested with resultant SPICE predictions of operation.
(app note added 2/06)
Analyze LED characteristics with PSPICE: 01/18/01 EDN Design Ideas / (addes
08/05) Recent advances in LED technology have lead to LEDs' widespread use in outdoor-signal applications, such as in traffic and
railroad signals. A typical LED signal consists of an LED array and a power supply. When a low-voltage power supply is eir desirable or
mandatory, series/parallel combinations of LEDs become inevitable. However, analyzing and optimizing series/parallel combinations of LEDs with
varying forward characteristics can be complicated. Using parametric and Monte Carlo capabilities of PSpice greatly simplifies this
task.
Circuit Protects FPGAs from killer SPICEs : 04/23/98
EDN-Design Ideas / (added 6/06) [Note: File contains many circuits, scroll to find this one] A project using Xilinx FPGAs brought
an interesting problem to light. When you turn on the board, one FPGA in three succumbs to this problem. A lot of frustration and testing
uncovered a negative-going spike (Figure 1) in the 5V line from the dc/dc converter. The system uses a dc/dc converter to convert 48V to 5V
and other voltages. The spike occurs before the converter delivers its intended 5V. Spikes greater than 5V would kill the FPGA with the
shortest path to the converter. The circuit in Figure 2 solves the problem.....
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