Tunable bandpass filter system and filtering method

Details Tunable bandpass filter system and filtering method Tunable bandpass filter system and filtering method

1990-12-26

1992-08-04

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333 171, 333167, H03H 700

Patent

active

051362678

ABSTRACT:
A tunable bandpass filter system and filtering method wherein the bandwidth of a tunable bandpass filter is adjusted as a function of the fundamental frequency of an input signal. Either a constant bandwidth or a constant quality factor tunable bandpass filter may be used. The center frequency of the tunable bandpass filter is adjusted in direct proportion to the product of the fundamental frequency and the number of a selected harmonic thereof. In the case of a constant bandwidth filter the bandwidth is adjusted in direct proportion to the quotient of the fundamental frequency divided by a selected filter quality factor. In the case of a constant quality factor filter, the bandwidth is indirectly controlled by adjusting the center frequency while adjusting the quality factor in inverse proportion to the harmonic number. The output amplitude of the filter is measured to determine the amount of distortion in the input signal. The fundamental frequency may be determined by measuring the input signal.

REFERENCES:
patent: 3644847 (1972-02-01), Neuman
patent: 3742395 (1973-06-01), Yoneyama
patent: 4545258 (1985-10-01), Coursolle
patent: 5019792 (1991-05-01), DiBiase et al.

Affiliated with

Also associated with

Rating

Tunable bandpass filter system and filtering method does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-781091