You can then optimize your design in-circuit or by using a circuit-analysis tool, such as Spice. Simple approximations quickly produce a workable design. Luckily, you can realize high-performance designs with minimal effort by applying some simple design rules. Your requirements probably mandate a transformer with fast rise and fall times along with a minimum of overshoot and ringing. Taking the mystery out of pulse-transformer design means first understanding the fundamentals. Typical applications of pulse transformers include voltage- and current-level transformation, dc isolation, matching impedances, polarity inversion, and providing gate-drive-to-FET or base-drive-to-bipolar transistors. As engineers work with increasingly higher frequencies, they must take greater care when designing pulse transformers. The pulse is usually rectangular, and maintaining the fidelity of its shape is important. In general, a pulse transformer transfers a pulse of current or voltage from the primary, or generating, side of the circuit, to the secondary, or load, side of the circuit. PSpice modeling shows you how to verify your design. A step-by-step design procedure walks you through all the basic stages. This article enables you to quickly and easily design pulse transformers for various applications. Both analog and digital designers use pulse transformers to perform a multitude of functions.
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