I.sub.cc current electromagnetic interference choke with multipl

Details I.sub.cc current electromagnetic interference choke with multipl I.sub.cc current electromagnetic interference choke with multipl

1998-07-17

1999-12-21

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

327276, H03K 514

Patent

active

060054298

ABSTRACT:
An apparatus for and method of reducing electromagnetic interference of an integrated circuit by providing multiple choking levels are disclosed. A choking circuit includes a choking level select signal generator, a pulse choking circuit connected to the choking level select signal generator, and a modulation control circuit connected to the pulse choking circuit. The choking level is increased when modules of the integrated circuit are less active, which reduces electromagnetic interference. The choking level is decreased when modules of the integrated circuit are more active, which maintains the voltage supplied to the power bus above a desired level.

REFERENCES:
patent: 5317207 (1994-05-01), Mortensen
patent: 5422919 (1995-06-01), Graham
patent: 5444402 (1995-08-01), McMahon et al.
patent: 5561792 (1996-10-01), Ganapathy
patent: 5650739 (1997-07-01), Hui et al.
patent: 5675832 (1997-10-01), Ikami et al.

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