Acoustic surface wave filters

Details Acoustic surface wave filters Acoustic surface wave filters

1975-09-25

1977-06-14

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

310 82, 310 98, 333 30R, H03H 904, H03H 906, H03H 926, H03H 932

Patent

active

040300501

ABSTRACT:
An acoustic surface wave filter for use as an intermediate frequency filter in a P.A.L. color television receiver comprising input and output transducers each having fingers of conductive material supported on a piezoelectric substrate the fingers of each transducer being electrically connected to a pair of terminal pads so that the fingers connected to one pad interleave with the fingers connected to the other pad, the transducers being mutually offset in a direction orthogonal to the direction of acoustic surface wave propagation and coupled by means of a multistrip coupler.

REFERENCES:
patent: 3376572 (1968-04-01), Mayo
patent: 3633132 (1972-01-01), Hartemann
patent: 3663899 (1972-05-01), Dieulesaint et al.
patent: 3699364 (1972-10-01), Gerard
patent: 3753166 (1973-08-01), Worley et al.
patent: 3792381 (1974-02-01), Bristol
patent: 3803520 (1974-04-01), Bristol et al.
patent: 3836876 (1974-09-01), Marshall et al.
patent: 3870975 (1975-03-01), Vasile
Marshall et al., "Surface Acoustic Multistrip Components and Their Applications", in IEEE Trans. on Microwave Theory an Techniques, vol. MTT21, No. 4, Apr. 1973, pp. 216-225.

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