Pulse transformer
A pulse transformer for use in a system which transmits digital signals in the form of pulses, e.g., an ISDN, is a wide-band transformer which is mainly intended for the waveform transmission. Pulse transformers are designed to maintain the input pulse waveform and power while transforming the source impedance to a value approximating the load impedance. In the field of electronic circuits, pulse electric technology such as digitization of electronic computers, pulse communication and measuring devices has been developed, and accordingly, there has been an increasing demand for circuit elements which exhibit a high performance in the wave-form transmission. Electrical pulse power systems are utilized in applications including infrared and radar pulse generating systems, microwave applications, and radiant energy systems, including arc lamps and lasers. A common and important application of pulse transformers is the coupling of a load resistance to a source of pulsed power. Radar transmitters, for instance, usually employ an output power tube such as a magnetron, which must be driven at a relatively high voltage and high impedance level. Like conventional transformers, pulse transformers typically consist of an input winding, an output winding, and a core structure of ferromagnetic material to transfer energy from the input winding to the corresponding output winding. Magnetic material is introduced in a special way into the central, concentric aperture of the primary and secondary windings, so that a completely transformative transducer is obtained. An electrical current flowing in the input winding creates a magnetomotive force which induces a flux flow in the ferromagnetic material. This change in flux in the magnetic circuit induces a current in the output winding and thereby effects the energy transfer.
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