Standard 111

IEEE Standard for Wide-Band (Greater Than 1 Decade) Transformers

Working Group Chairman: John Decramer

Phone: 507-532-3211
email: jdecramer@bhelectronics.com

Status: Balloting For Approval 1^ST Quarter 1998

Scope:

This standard pertains to electronics wide-band transformers transmitting power within a wide band of frequencies covering typically at least one decade in the frequency spectrum. It is not intended to apply to transformers optimized to operate within a narrow band of frequencies. Transformers used in or in conjunction with wire line communication facilities serving power stations are excluded due to the special protection requirements involved. Provision is made for including data for the use in the design of feedback amplifiers and control networks or other circuits in which the knowledge of transformer amplitude and phase frequency response is needed by the system designer. These transformers are required to transform voltage within specified tolerances of amplitude and phase when operating between specified impedances. Guides to application and test procedures are included. These appendices contain certain precautions and recommended practices.

This standard also pertains to hybrid transformers, primarily used in the telecommunications industry. The hybrid transformer is a wideband transformer used in a manner which makes it part of a capacitance, resistance and/or inductance network and it must have characteristics which permit it to match the network for overall performance.

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