Semi-active notch filter

Details Semi-active notch filter Semi-active notch filter

1982-11-30

1984-08-07

Mullins, James B.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330306, 328167, H03F 368

Patent

active

044646372

ABSTRACT:
A plurality of passive filters in combination with a corresponding plurality of operational amplifiers form an individual series of quasi low-pass, bandpass, and quasi high-pass filters which when their outputs are summed in an operational amplifier summer, constitute a "semi-active" notch filter having a low frequency phase shift of substantially zero, and a notch frequency which can be adjusted independently of the low frequency phase shift. The existence of the notch is also independent of the properties and limitations of the operational amplifiers used.

REFERENCES:
patent: 3594650 (1971-07-01), Henoch
patent: 3648187 (1972-03-01), Saunders
patent: 3849677 (1974-11-01), Stacey et al.
patent: 4045748 (1977-08-01), Filliman
Jablonski, "Improved Josephson Analogue System for Modeling Superconductive unneling", Navy Technical Disclosure Bulletin, vol. 7, No. 4, Jun. 1982.

Affiliated with

Also associated with

Rating

Semi-active notch filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-605232