EMI filter circuit

Details EMI filter circuit EMI filter circuit

2005-05-24

2005-05-24

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

Reexamination Certificate

active

06898092

ABSTRACT:
Techniques for reducing noise generated by a circuit include a common mode filter and a differential mode filter. The common mode filter includes an input for sensing a common mode signal between a power source and the circuit, an output, and active circuitry for producing an offset signal on the output. The differential mode filter includes an input, an output, and active circuitry for sensing a differential mode signal and producing variations in resistance between the input and output to offset the differential signal.

REFERENCES:
patent: 5321373 (1994-06-01), Shusterman et al.
patent: 5734259 (1998-03-01), Sisson et al.
patent: 5781390 (1998-07-01), Notaro et al.
patent: 5804859 (1998-09-01), Takahashi et al.
patent: 5831842 (1998-11-01), Ogasawara et al.
patent: 5939867 (1999-08-01), Capici et al.
patent: 5945816 (1999-08-01), Marusik
patent: 6137267 (2000-10-01), Kates et al.
patent: 6232755 (2001-05-01), Zhang
patent: 6236194 (2001-05-01), Manabe et al.
patent: 6269011 (2001-07-01), Ohshima
patent: 6642672 (2003-11-01), Hu et al.
patent: 6775157 (2004-08-01), Honda
patent: 20010045863 (2001-11-01), Pelly
patent: 2 738 086 (1997-02-01), None
N.K. Poon, et al., “Techniques for Input Ripple Current Cancellation: Classification and Implementation,” IEEE Transactions on Power Electronics, vol. 15 (6), Nov. 2000, pp. 1144-1152.
L. LaWhite et al., “Design of Active Ripple Filters for Power Circuits in the 1-10 MHz Range,” IEEE Transactions on Power Electronics, vol. 3 (3), Jul. 1998, pp. 310-317.
Y-C Son and S-K Sul, “A Novel Active Common-mode EMI Filter for PWM Inverter,” Proceedings of the 7thIEEE Applied Power Electronics Conference and Exposition 2002, vol. 1, ISBN 0-7803-7404-5, pp. 545-549.
S. Ogasawara et al., “An Active Circuit for Cancellation of Common-Mode Voltage Generated by a PWM Inverter,” IEEE Transactions on Power Electronics, vol. 13 (5), Sep. 1998, pp. 835-841.
A.L. Julian et al., “Active Filtering for Common Mode Conducted EMI Reduction in Voltage Source Inverters,” IEEE Trans. Industrial Applications, 1998, pp. 934-939.
H.W. Ott, Noise Reduction Techniques in Electronic Systems, John Wiley & Sons, Inc., 1988.
L.E. LaWhite, “Active Filters for 1MHz Power Circuits Under Strict Ripple Limitations,” MS Thesis, Massachusetts Institute of Technology, Cambridge, MA, 1987, pp. 1-99.
L.E. LaWhite, M.F. Schlecht, Active Filters for 1-MHz Power Circuits with Strict Input/Output Rippel requirements, IEEE Transactions on Power Electronics, vol. PE-2, No. 4, 1987, pp. 282-290.

Affiliated with

Also associated with

Rating

EMI filter circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with EMI filter circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and EMI filter circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3406634