Method and apparatus for the efficient test of the center freque

Details Method and apparatus for the efficient test of the center freque Method and apparatus for the efficient test of the center freque

1997-12-10

2000-10-03

Metjahic, Safet

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

324618, G01R 2728

Patent

active

061278297

ABSTRACT:
A method and apparatus for determining the center frequency of a bandpass filter. The center frequency of a bandpass filter is determined by applying a bias voltage to a bandpass filter circuit receiving a pair of differential input voltages and producing a pair of differential output voltages. The differential output voltages are modified to exhibit a notchband magnitude characteristic. A minimum value of the differential output voltages exhibiting the notchband characteristic over a predetermined range of frequencies is determined and corresponds to the center frequency of the bandpass filter.

REFERENCES:
patent: 3419799 (1968-12-01), Papadeas
patent: 4467271 (1984-08-01), Ruckenbauer

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