EE310 Integrated Circuits Seminar, 11/27/01

Ann Guerra guerra at
Wed Nov 21 23:10:51 PST 2001

EE310 Integrated Circuits Technology and Design Seminar

     "A Cool Cooling Fan Controller"

	     Jeroen Fonderie

	Tuesday, November 27, 2001
		4:15 p.m.
	Building 380, Room 380X


Controlling the speed of cooling fans in servers, desktop computers and even
notebooks increases the fan's lifetime, reduces audible noise and lowers power
consumption. This presentation deals with design considerations for a fan
controller that linearly regulates and monitors the fan's speed. On a system
level, the feedback loop around the fan will be discussed and it will be shown
that a phase-locked loop design does not work for this application. On a
transistor level, several of the analog sub-circuits (opamps, comparators, a
simple 10-bit DAC) will be analyzed.

Bruce Wooley wrote:

> Jeroen,
> Great.  November 27 it is.  I'll look for the title and abstract next week
> or so.
> Thanks.
> Bruce

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