Charge-coupled transversal filter

Details Charge-coupled transversal filter Charge-coupled transversal filter

1985-03-12

1986-09-16

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Frequency or time domain filters and delay lines utilizing...

357 24, 333166, 377 60, H03H 1502, H03K 5153

Patent

active

046125213

ABSTRACT:
The invention relates to a charged-coupled transversal filter of the parallel-in series-out (PISO) type having a buried channel of one conductivity type and zones diffused into the channel of the other conductivity type, which zones 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 selecting the sizes of these zones, which constitute the emitters of bipolar transistors, whose bases are constituted by the clock electrodes and whose collectors are 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.

REFERENCES:
patent: 4233578 (1980-11-01), Knauer et al.
patent: 4321002 (1980-10-01), Knauer et al.
Baba et al-"A New Weighting Method For CCD Analog Samped Filter", Japanese Journal of Applied Physics, vol. 16 (1977), supplement 16-1.

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