Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2011-04-05
2011-04-05
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C333S190000, C333S017100, C333S193000
Reexamination Certificate
active
07920036
ABSTRACT:
A lattice tunable filtering circuit includes a first input and a second input, and a first output and a second output. The circuit includes two series branches and two parallel branches. The first and second series branches include a Tunable Resonator Component (TRC) which presents a first series resonance frequency whereas the third and fourth parallel branches present a second series resonance frequency which has a value being lower than that of the first series resonance frequency. The first and second series resonance frequencies are tunable by one analog control quantity. The filtering circuit further includes a feedback control loop for the control of the analog quantity, which feedback is based on a criterion of equality between the modulus of impedances Zs and Zp.
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Cathelin Andreia
Kaiser Andreas
Razafimandimby Stephane
Boller Timothy L.
Centre National de la Recherche Scientifique
Jorgenson Lisa K.
Seed IP Law Group PLLC
STMicroelectronics S.A.
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