Charge-coupled transversal filter

Details Charge-coupled transversal filter Charge-coupled transversal filter

H - Electricity

03

H

328/0.4

H03H 15/02 (2006.01) G05F 3/22 (2006.01) H01L 29/765 (2006.01)

Patent

CA 1243734

ABSTRACT. Charge-coupled transversal filter. The invention relates to a charged-coupled transversal filter of the parallel-in series-out (PISO) type having a buried channel of the one type and zones diffused into the channel of the other type, which constitute the clock electrodes. The inputs also comprise a zone of the one conductivity type which is provided in the associated zone of the second conductivity type. The weighting factors are formed by means of the sizes of these zones, which constitute the emitters of bipolar tran- sistors, whose bases are constituted by the clock electrodes and whose collector is constituted by the channel. The signal to be filtered is introduced by first converting the signal into a current and by then distributing the latter over the various emitters. Stages having positive and negative weighting factors can be readily combined to form a CCD. Fig.2.

476163

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