Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Carolynn Bernier

Jean-Baptiste David

Quentin Bruel

A filter device including an input electronic circuit having an input load admittance Yin, an output electronic circuit having an output load admittance Yout, a lattice filter with two types of two piezoelectric resonators having a characteristic impedance Zc; those of the first type have a resonant frequency Fr1 and an antiresonant frequency Fa1; those of the second type have a resonant frequency Fr2 different from Fr1 and an antiresonant frequency Fa2 different from Fa1. The input and output impedances are matched to the reciprocal of the real part Re{Yin} of the admittance Yin and the reciprocal of the real part Re{Yout} of the admittance Yout, which are at least two to five times greater than the characteristic impedance Zc of the resonators. The frequency differences Fa1&#x2212;Fr1 and Fa2&#x2212;Fr2 are at least two to three times greater than the absolute value of the difference Fr1&#x2212;Fr2.

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Grenoble, France

Carolynn Bernier