Apparatus and method for resonance reduction

• US 7,119,607 B2
• Filed: 12/31/2002
• Issued: 10/10/2006
• Est. Priority Date: 12/31/2002
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Zhao, Cangsang, Huang, Mingwei
• Primary Examiner(s): Feild, Lynn
• Assistant Examiner(s): RUTLAND WALLIS, MICHAEL
• Application Number:
  US10/331,659
• Publication Number:
  US 20040124715A1
• Time in Patent Office: 1,379 Days
• Field of Search: 333/12, 257/433, 323/208, 363/39, 327/47, 327/256, 327/257, 327/551, 326/30
• US Class Current: 327/551
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: H03K 5/151 with two complementary outputs

Abstract

A system is provided that includes a power distribution network to provide a switching current and a resonance reduction circuit to sense the switching current within a frequency range and to generate a resonance reduction signal having a current component at substantially a same frequency and substantially 180 degrees out of phase from the sensed switching current. The power distribution network may combine the switching current with the resonance reduction signal to provide a total switching current that may be provided to a processor as the powering signal.

Claims

1. A circuit comprising:

a first portion to sense a signal within a frequency range; and

a second portion to generate a signal having a current component at substantially a same frequency and substantially 180 degrees out of phase from the sensed signal; and

a combining circuit to provide a total switching signal to power a device by combining a switching signal corresponding with the sensed signal and the signal having the current component.

2. The circuit of claim 1, wherein the second portion generates the signal when a resonance amplitude is greater than a designated threshold.

3. The circuit of claim 1, wherein the second portion comprises a transistor to output the signal having the current component.

4. The circuit of claim 1, wherein the total switching signal has less resonance than the switching signal.

5. The circuit of claim 1, further comprising a band-pass portion to provide a bias point for a band-pass filter and to provide a sensing signal.

6. The circuit of claim 5, further comprising an amplifier portion to receive the sensing signal from the band-pass portion.

7. The circuit of claim 6, wherein the second portion turns ON when the sensing signal is greater than a threshold of the amplifier portion.

8. The circuit of claim 7, wherein the second portion turns OFF when the sensing signal is less than the threshold of the amplifier portion.

9. The circuit of claim 1, wherein the circuit turns ON when the sensed signal has a component within a frequency range and when a voltage fluctuation magnitude is greater than a threshold, and the circuit turns OFF when the sensed signal is outside of the frequency range.

10. A system comprising:

a power distribution network to provide a switching current;

a resonance reduction circuit to sense the switching current within a frequency range and to generate a resonance reduction signal having a current component at substantially a same frequency and substantially 180 degrees out of phase from the sensed switching current; and

wherein the power distribution network provides a total switching current to power a device by combining the switching current and the resonance reduction signal.

11. The system of claim 10, further comprising a processor coupled to the power distribution network, the processor being powered by the total switching current.

12. The system of claim 10, wherein the resonance reduction circuit generates the resonance reduction signal when a resonance amplitude is greater than a designated threshold.

13. The system of claim 10, wherein the resonance reduction circuit comprises a transistor to output the resonance reduction signal.

14. The system of claim 10, wherein the resonance reduction circuit includes a band-pass portion to provide a bias point for a band-pass filter and to provide a sensing signal.

15. The system of claim 14, wherein the resonance reduction circuit further includes an amplifier portion to receive the sensing signal from the band-pass portion.

16. The system of claim 15, wherein the resonance reduction circuit turns ON when the sensing signal is greater than a threshold of the amplifier portion.

17. The system of claim 16, wherein the resonance reduction circuit turns OFF when the sensing signal is less than the threshold of the amplifier portion.

18. The system of claim 10, wherein the resonance reduction circuit turns ON when the sensed switching current has a component within a frequency range and when a voltage fluctuation magnitude is greater than a threshold, and the circuit turns OFF when the sensed switching current is outside of the frequency range.

19. A system comprising:

a circuit to generate a resonance reduction signal having a current component at substantially a same frequency and out of phase from a switching signal; and

a power distribution network to provide the switching signal and to provide a total switching current to power a device by combining the switching current and the resonance reduction signal.

20. The system of claim 19, wherein the resonance reduction signal is substantially 180 degrees out of phase from the switching signal.

21. The system of claim 19, further comprising a processor coupled to the power distribution network, the processor being powered by the total switching current.

22. The system of claim 19, wherein the circuit generates the resonance reduction signal when a resonance amplitude is greater than a designated threshold.

23. The system of claim 19, wherein the circuit comprises a transistor to output the resonance reduction signal.

24. The system of claim 19, wherein the circuit includes a band-pass portion to provide a bias point for a band-pass filter and to provide a sensing signal.

25. The system of claim 24, wherein the circuit further includes an amplifier portion to receive the sensing signal from the band-pass portion.

26. The system of claim 25, wherein the circuit turns ON when the sensing signal is greater than a threshold of the amplifier portion.

27. The system of claim 26, wherein the circuit turns OFF when the sensing signal is less than the threshold of the amplifier portion.

28. The system of claim 19, wherein the circuit turns ON when the sensed current has a component within a frequency range and when a voltage fluctuation magnitude is greater than a threshold, and the circuit turns OFF when the sensed current is outside of the frequency range.

29. A method comprising:

sensing a switching signal within a frequency range;

generating a resonance reduction signal having a current component at substantially a same frequency and substantially 180 degrees out of phase from the sensed switching signal; and

powering a device using a power signal, the power signal combining the switching signal and the resonance reduction signal.

30. The method of claim 29, wherein generating the resonance reduction signal comprises determining when a resonance amplitude is greater than a designated threshold.

31. The method of claim 29, wherein powering the device includes providing a total switching signal by combining the switching signal corresponding with the sensed signal and the resonance reduction signal.

32. The method of claim 29, wherein generating the resonance reduction signal comprises turning ON a device when the sensed signal has a component within a frequency range and when a voltage fluctuation magnitude is greater than a threshold, and turning OFF the device when the sensed signal is outside of the frequency range.

33. The method of claim 29, wherein generating the resonance reduction signal comprises turning ON a transistor when the sensed signal is greater than a threshold.

34. The method of claim 33, further comprising turning OFF the transistor when the sensed signal is less than the threshold.