H - Electricity – 03 – H
Patent
H - Electricity
03
H
356/119, 328/0.4
H03H 17/00 (2006.01) H03H 15/02 (2006.01)
Patent
CA 1134458
ABSTRACT OF THE DISCLOSURE A monolithically integrated filter circuit having low transmission losses and a high upper cutoff frequency has at least one charge transfer device with a self-contained transmission channel provided on a doped semicon- ductor body to which transmission channels of other charge transfer devices are connected at predetermined nodal points. Each charge transfer device has shift electrodes arranged over an insulating layer over a limiting surface of the semiconductor body which are charged with clock voltages. Shift electrodes in the immediate proximity of a nodal point are charged with the same clock voltage but are separately allocated to different transmission channels and have a pre-determined surface area ratio with regard to each other and the sum of their surface areas is equal to the surface area of an adjacent shift electrode which is allocated to the self-contained transmission channel. The transmission channel formed by the electrodes at a nodal point is disposed at an angle with respect to the transmission direction of the self- contained transmission channel which is approximately 45°.
348648
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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