Our Technology: Electric Filters Design

Electric Filters Design

Intensive research is carried out for the design of high stable, high accuracy filters based on Film Bulk Acoustic Resonators (FBAR). An application for the patent of a new filter structure has been filed (International Patent Application No. PCT/IB2009/006083). The filter structure has the following properties:

• The circuit consists of resonators and amplifiers;
• A smaller number of resonators used compared to the existing FBAR filter structures with similar selectivity;
• Easier adjustment of filter pass-band through the use of amplifier parameters;
• Ability to create and tune in wide frequency range of transmission zeros in the filter stop-band by varying the amplifier parameters only;
• Moderate requirements concerning amplifiers since they are not involved in feedbacks.

The area of application of the new filter is in the analog front end of RF transceivers.

Previous products: Design and producing of high accuracy extremely narrow band quartz-crystal filters for FDM phone systems.