Method of measuring parameters of a crystal filter

Details Method of measuring parameters of a crystal filter Method of measuring parameters of a crystal filter

1977-04-06

1978-06-06

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 57, 324 55, 324 80, G01R 2922, G01R 2726

Patent

active

040939146

ABSTRACT:
Dual resonator crystal filters have an input electrode, a common electrode, and an output electrode which provide two resonators coupled together. Mathematical formulas were derived to determine the resonator frequencies, the synchronous peak separation frequency, and the normalized center frequency. These formulas use selected frequencies or parameters which can be easily measured by applying a variable band of frequencies to the input electrode of a dual crystal filter. Measurements are made of the frequencies at which the voltage at the common electrode is a maximum when the output electrode is connected to the common electrode by capacity and when the output electrode is connected to the common electrode by a short circuit. The measured frequencies can be used in the mathematical formulas to determine the resonator frequencies, the synchronous peak separation frequency, and the normalized center frequency. Other mathematical formulas were also derived to determine the resonator frequencies, the synchronous peak separation frequency, and the normalized center frequency. These other formulas use frequencies at which maximum and minimum voltages are measured when the output electrode is connected to the common electrode by a short circuit.

REFERENCES:
patent: 2293135 (1942-08-01), Hallmark
patent: 2944215 (1960-07-01), Corson
patent: 2991436 (1961-07-01), Banton
patent: 3397359 (1968-08-01), Rohde
patent: 3445762 (1969-05-01), Wu
patent: 3963982 (1976-06-01), Roberts

Affiliated with

Also associated with

Rating

Method of measuring parameters of a crystal 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 Method of measuring parameters of a crystal filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring parameters of a crystal filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1495147