Transversal filter comprising an improved notch...

Details Transversal filter comprising an improved notch... Transversal filter comprising an improved notch...

2006-06-13

2006-06-13

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C310S31300R

Reexamination Certificate

active

07061346

ABSTRACT:
The invention provides a surface wave transversal filter having an input transducer and an output transducer in which the input transducer has a primary weighting which determines the transfer function and in which the output transducer is provided with a low secondary weighting in order to improve the trap characteristic.

REFERENCES:
patent: 4075582 (1978-02-01), Walker
patent: 4472653 (1984-09-01), Yamada
patent: 4910483 (1990-03-01), Mitchell et al.
patent: 53-114644 (1978-10-01), None
patent: 1-303911 (1989-12-01), None
patent: 2000655 (1993-09-01), None
Basuk et al, “Design of Low-Shape-Factor SAW Filters Having a Single Acoustic Track”,1996 IEEE International Frequency Control Symposium, pp. 291-295, Jun. 1996.

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