Transversal filter

Details Transversal filter Transversal filter

H - Electricity

01

L

328/0.4

H01L 27/12 (2006.01) H03H 17/00 (2006.01)

Patent

CA 1132666

ABSTRACT OF THE DISCLOSURE A transversal filter has at least one analog shift register which includes a number of parallel inputs and one series output. A further number of individual, predeterminable evaluator circuits are provided, each evaluator circuit having at least one signal input for the input of the signal to be filtered and at least one output, and each evaluator circuit comprises a pair of capacitors arranged on a surface of a substrate. The substrate has at least one substrate terminal and comprises doped semiconductor material which carries a first insulating layer or blocking layer capacitor which contacts an oppositely doped zone located on the surface of the substrate and which is provided with a terminal contact. A second insulating layer or blocking layer capacitor is arranged beside the first capacitor, the second capacitor connectible, via a switching element, to an associated parallel input. At least one evaluator circuit is designed such that its doped zone has a recess into which the first insulating layer or blocking layer capacitor is disposed, the first capacitor likewise having a recess into which the second capacitor is disposed so that the second capacitor is surrounded by the doped zone and by the first capacitor.

384335

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