Back to results
US 2003/0151906 A1Published application
Electromagnetic noise suppression device
AssigneeIntel Corporation
InventorMichael J. Schaffer
Life of this patent
Estimating the term…
Abstract
Briefly, in accordance with one embodiment of the invention, an electromagnetic interference (EMI) reduction device may include a circuit and at least one heatsink. The circuit may include analog devices coupled to reduce EMI signals received by the heatsink. The devices may be specifically adapted to substantially invert or phase-shift by 180° the EMI signals received by the heatsink.
Claims26
1:
- An apparatus comprising:
- a circuit and
- at least one heatsink;
- said at least one heatsink and said circuit coupled so as to at least partially reduce electromagnetic interference (EMI) signals received by said at least one heatsink during circuit operation.
1 more element
2:
- The apparatus of claim 1, wherein said circuit further comprises at least one active analog device, said at least one active analog device being capable of generating a signal to at least partially reduce said EMI signals.
3:
- The apparatus of claim 2, wherein said at least one active analog device comprises an operational amplifier.
4:
- The apparatus of claim 2, wherein said at least one analog device substantially produces an inversion of said EMI signals received by said at least one heatsink during circuit operation.
5:
- The apparatus of claim 4, wherein the superposition of said EMI signals received during operation by said at least one heatsink with said inversion of said EMI signals results in a near cancellation of said EM signals.
6:
- The apparatus of claim 1, wherein said active circuit is coupled so as to at least partially reduce said EMI signals selected from a group consisting essentially of frequencies above, below, and equal to a substantially predetermined frequency threshold.
7:
- The apparatus of claim 4, wherein said circuit is coupled to dynamically adjust said inversion of EMI signals during circuit operation.
8:
- The apparatus of claim 7, wherein said circuit is coupled to dynamically adjust the amplitude of said inversion of EMI signals during circuit operation.
9:
- The apparatus of claim 1, wherein said circuit is coupled to receive electrical power from an electrically powered cooling device coupled to said at least one heatsink.
10:
- An integrated circuit (IC) to be coupled to at least one heatsink comprising:
- a circuit;
- said circuit having an electrical configuration so that when said circuit is in operation, said circuit at least partially reduces the electromagnetic interference (EMI) signals received by said at least one heatsink.
11:
- The integrated circuit (IC) of claim 10, wherein said circuit and said at least one heatsink are physically attached.
12:
- The integrated circuit (IC) of claim 10, wherein said circuit further comprises at least one active analog device, said at least one active analog device being capable of least partially reducing said EMI signals.
13:
- The integrated circuit (IC) of claim 12, wherein said at least one analog device comprises an operational amplifier.
14:
- The integrated circuit (IC) of claim 12, where said at least one analog device substantially produces an inversion of said EMI signals received by said at least one heatsink during circuit operation.
15:
- The integrated circuit (IC) of claim 10, wherein said circuit is coupled so as to at least partially reduce said EMI signals selected from a group consisting essentially of frequencies above, below, and equal to a substantially predetermined frequency threshold.
16:
- The integrated circuit (IC) of claim 10, wherein said circuit is coupled to dynamically adjust said inversion of EMI signals during circuit operation.
17:
- The integrated circuit (IC) of claim 10, wherein said circuit is coupled to receive electrical power from an electrically powered cooling device coupled to said at least one heatsink.
18:
- A system comprising:
- a computing platform, including
- a component to process instructions,
- a memory to store instructions;
- a circuit and
- at least one heatsink;
- said heatsink and said circuit coupled so as to at least partially reduce electromagnetic interference (EMI) signals produced by said computing platform and received by said at least one heatsink during circuit operation.
4 more elements
19:
- The system of claim 18, wherein said circuit further comprises at least one active analog device, said at least one active analog device being capable of least partially reducing said EMI signals.
20:
- The system of claim 18, wherein said at least one heatsink and said circuit are integrated so as to form an individual component.
21:
- The system of claim 18, wherein said circuit is coupled to dynamically adjust said inversion of EMI signals during circuit operation.
22:
- The system of claim 21, wherein said at least one heatsink is additionally configured to implement passive EM signal reduction.
23:
- A method of using a heatsink comprising:
- receiving electromagnetic interference (EMI) signals via said heatsink;
- producing an electromagnetic signal to at least partially reduce said EMI signals.
24:
- The method of claim 23, wherein producing an electromagnetic signal to partially reduce said EMI signals comprises substantially inverting said received EMI signals.
25:
- The method of claim 23, wherein producing an electromagnetic signal to partially reduce said EMI signals comprises dynamically adjusting said electromagnetic signal during operation to at least partially reduce said EMI signals.
26:
- The method of claim 23, wherein producing an electromagnetic signal to at least partially reduce said EMI signals comprises producing an electromagnetic signal selected from a group consisting of essentially of frequencies above, below, and equal to a substantially predetermined frequency threshold.