Active band pass filter

Details Active band pass filter Active band pass filter

1980-06-16

1982-10-26

Mullins, James B.

Amplifiers

Signal feedback

Phase shift means in loop path

330109, H03F 134

Patent

active

043564518

ABSTRACT:
An active band pass filter is provided in which the band pass or resonant frequency can be varied. The band pass filter comprises a differential amplifier having a pair of input resistors wherein the input signal is fed through both input resistors and to both the inverting and noninverting inputs of the differential amplifier. Second order feedback to the inverting input is provided through an RC parallel combination while a capacitor provides differential feedback to the noninverting input of the differential amplifier. A variable resistor is electrically connected between the non-inverting input and ground and is used to vary the pass band or resonant frequency of the band pass filter.

REFERENCES:
patent: 3946328 (1976-03-01), Boctor
patent: 3955150 (1976-05-01), Soderstrand
patent: 3972006 (1976-07-01), Ruegg
patent: 3993959 (1976-11-01), Boctor
patent: 4015224 (1977-03-01), Benzinger
patent: 4050023 (1977-09-01), Edgar
Sierra, "Active Filters Without Inductors", IBM Technical Disclosure Bulletin, vol. 15, No. 6, Nov. 1972, pp. 1788, 1789.

Affiliated with

Also associated with

Rating

Active band pass 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 Active band pass filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active band pass filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-950594