Definition: | one of the two frequencies of a piezoelectric resonator in association with a series or parallel load capacitance, under specified conditions, at which the electrical impedance of the combination is resistive Note 1 to entry: The load resonance frequency is the lower of the two frequencies when the load capacitance is in series and the higher when it is in parallel. Note 2 to entry: This entry was numbered 561-02-12 in IEC 60050-561:1991.
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