272-1970 - IEEE Standard for Computer-Type (Square-Loop) Pulse Transformers
Description: This standard pertains to computer-type pulse transformers. These pulse transformers are characterized by their use of a 'square-loop' core material as defined, with normal operation into the saturation flux density regions and with typical operation using a specifically defined current input pulse. These transformers exploit the memory characteristic of square-loop core material that makes the output pulse dependent upon the immediate history of the core flux. This type of transformer is used in shift registers, memory access switches, memory readout circuits, transformer logic matrices, and other storage-type devices. The first appendix contains a core analysis, transformer equivalent circuit, and definitions of associated terms. The second appendix contains definitions pertaining mainly to characteristic testing of computer-type pulse transformers.