Wave transmission lines and networks – Coupling networks – Frequency or time domain filters and delay lines utilizing...
Patent
1978-05-11
1981-01-13
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Frequency or time domain filters and delay lines utilizing...
307221D, 333166, 357 24, H03H 1502, H03K 5135, G11C 1928
Patent
active
042451990
ABSTRACT:
A filter in the form of a semiconductor charge coupled device (CCD) split electrode transveral filter section (10) of many transfer stages, typically of the order of 150, is characterized by a controllable detection threshold level by means of the addition of an auxiliary CCD split-electrode section (20) of but a few stages, typically one or two. Each segment of a split-electrode 209 of this auxiliary section (20) is connected to the corresponding sense line of the transveral filter section (10).
REFERENCES:
patent: 4032867 (1977-06-01), Engeler et al.
patent: 4075514 (1978-02-01), Sequin
patent: 4126836 (1978-11-01), Carnes et al.
patent: 4139783 (1979-02-01), Engeler
Baertsch et al., "The Design and Operation of Practical Charge-Transfer Transversal Filters", in IEEE Trans. on Electron Devices, vol. ED-23, No. 2, Feb. 1976, pp. 133-141.
Ibraham et al., "Multiple Filter Characteristics Using a Single CCD Structure", 1975, International Conference on the Application of Charge-Coupled Devices, Oct. 1975, pp. 245-249.
Bell Telephone Laboratories Incorporated
Caplan David I.
Nussbaum Marvin L.
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